Publications

The automatic graphitization system (AGE3) by IonPlus is very popular among radiocarbon dating laboratories. Usually, solid samples are burnt in an elemental analyzer (EA), and the gaseous CO2 is transferred for graphitization. Our system is coupled also with an isotope ratio mass spectrometer (IRMS), which measures the δ¹³C and δ¹⁵N of that gas. Some less routine pretreatment protocols require the production of gaseous samples and prevent the possibility of using the EA-AGE3 system, as the EA is used for solid samples only. In order to use that system, including the measurements of stable isotopes, we developed a glass tube cracker that connects to the EA. The device is routinely used in our laboratory and is mainly built from Swaglok catalog parts. We show that the background (blank) levels of a marble standard are indistinguishable between using the cracker and burning solid marble using the EA. We further demonstrate that the δ¹³C values are consistent and that the extraction efficiency when using the device is above 93%. Full descriptions, drawings, and working protocol are supplied.

Identification of the sex of modern, fossil and archaeological animal remains offers many insights into their demography, mortality profiles and domestication pathways. However, due to many-factors, sex determination of osteological remains is often problematic. To overcome this, we have developed an innovative protocol to determine an animals sex from tooth enamel, by applying label-free quantification (LFQ) of two unique AmelY peptides LRYPYP (AmelY;[M+2]2+ 404.7212 m/z) and LRYPYPSY (AmelY;[M+2]2+ 529.7689 m/z) that are only present in the enamel of males. We applied this method to eight modern cattle (Bos taurus) of known sex, and correctly assigned them to sex. We then applied the same protocol to twelve archaeological Bos teeth from the Neolithic site of Beisamoun, Israel (8-th7-th millennium BC) and determined the sex of the archaeological samples. Since teeth are usually better preserved than bones, this innovative protocol has potential to facilitate sex determination in ancient and modern bovine remains that currently cannot be sexed.

With a rich, well-dated Early Upper Palaeolithic layer, the Mughr el-Hamamah cave site is key for understanding the Middle-Upper Palaeolithic transition in the Levant. The archaeological deposit consists of two units. Layer A resulted from pastoral activities during the 20th century and Layer B dated between 44.5 and 40.0 ky BP. During Layer A's formation, shepherds disturbed Layer B, redepositing Early Upper Palaeolithic sediments and lithic artefacts in Layer A matrix. Activity from Layer A's formation also resulted in spatially patchy percolation and bioturbation, leaving microarchaeological traces such as dung spherulites in some areas in Layer B. In contrast, contemporaneous chemical diagenetic processes from Layer B's primary formation caused spatially uneven post-depositional dissolution of animal bone. In this article we present a multi-proxy microarchaeological approach to investigate the post-depositional processes in Layer B, focussing on possible impacts on the plant archaeological record. The identification of intrusive spherulites from shepherds activities define the limits of disturbance in Layer B. Micromorphological analyses have identified four intact micro-facies in Layer B, representing an interplay of natural and anthropogenic factors. Micromorphological details in bedded combustion features favour the interpretation that associated phytoliths represent fuel traces. Dicot fruit phytoliths occur in the western area of the cave, where well-preserved charred wood and seeds were also found. Grass-diagnostic phytoliths correspond to C₃ and C₄ taxa, indicating an overall humid environment with dry spells. Microarchaeological analysis identifies traces of both bedded and dispersed hearth materials, mixed with variable plant resources for food, fuel, and possibly other uses. This strengthens the interpretation of Mughr el-Hamamah Layer B as a dense, complicated palimpsest of recurring activities, formed over many millennia.

The site of Manot Cave in western Galilee, Israel, has been a focus of research on the Levantine Upper Paleolithic since its discovery in 2008. Thick archaeological accumulations and good preservation of organic remains, including charcoal fragments, provided a stable base for the study of the Upper Paleolithic chrono-cultural sequence, alongside the paleoenvironmental conditions at the time of human occupations. Past research indicated the presence of at least three cultural entities in the cave: Early Ahmarian, Levantine Aurignacian, and a younger entity temporarily referred to as post-Levantine Aurignacian, while radiocarbon and isotope dating provided a preliminary chronological frame ca. 4634 ky calBP. This paper presents a comprehensive study of the unpublished, in-situ occupation layers identified near the entrance to the cave (Area E). This study, encompassing stratigraphic reconstruction and lithic analysis of eight distinct occupation layers, presents a refined chronological frame and revised cultural affiliations. It suggests a division of the sequence from Area E into three main occupation phases: Phase 3, containing a combination of technological and typological attributes comparable to both the Early Ahmarian and Levantine Aurignacian, to which a secure cultural affiliation is pending further research; Phase 2, containing classic Levantine Aurignacian industries, dated ca. 37.536.0 ky calBP; and Phase 1, contains industries with increasing microlithic dominance, and the prominent presence of truncation burins and items with lateral carination, affiliated here with the Atlitian of the Levantine Mediterranean region. Radiocarbon chronology indicates a maximum age of ca. 34.533.1 ky calBP for this occupation phase. This study establishes Manot Cave as a key site for the study of Levantine Upper Paleolithic cultural dynamics, providing a unique, well-dated sequence and comparable techno-typological data of the flint industries.

Spatial and temporal variations in the atmospheric bomb radiocarbon make it a very useful tracer and a dating tool. With the introduction of more atmospheric bomb radiocarbon records, the spatial and temporal changes in bomb radiocarbon are becoming clearer. Bomb radiocarbon record from a pine tree in the northern Israel region shows that the Δ¹⁴C level in the region is closer to the northern hemisphere zone (NH) 1 as compared to the northern hemisphere zone (NH) 2. A comparison of this pine's Δ¹⁴C record with a nearby olive tree's Δ¹⁴C values also highlights changes in the growing season of the olive wood from one year to the other. The observation suggests that olive wood ¹⁴C ages can show offset compared to the IntCal curve, and thus they should be interpreted cautiously.

The Epipalaeolithic Natufian Culture (latest Pleistocene Levant, ca. 15,00011,500 cal bp) represents relatively sedentary and complex foraging societies, but the plant communities near their most intensively occupied hamlets (in the Mediterranean region of the southern Levant) are not well known. Here we present the charcoal and seed assemblages, and direct radiocarbon dating of select specimens, from el-Wad Terrace, Mount Carmel, Israel, a thick and multi-layered Early to Late Natufian sequence. Wood remains indicate an East Mediterranean oak forest/maquis, with varying ratios of evergreen and deciduous oak types as primary components of the local environment, as well as almond and buckthorn. The highest density of remains is in the architectural phase of the Early Natufian, when the site was very intensively inhabited (15,00013,800 cal bp). In this phase, wood and seed remains are distributed all over the residential area, conforming to patterns of other finds that show primary discard and no rigid partitioning of space. Comparison of the seed assemblages to Kebara Cave, a Middle Palaeolithic site in the same geographic setting, points to an elevated use of cereals in the Natufian. Our data provide insights into several chronological, spatial and behavioural patterns, which emerge along the Natufian sequence at the site.

Evidence of fire is one of the most important features for identifying and characterizing destruction events. Analysis of microscopic remains of fire has developed exceedingly in recent years, enabling archaeologists to examine new questions relating to the intensity of destruction events and to the circumstances of the creation of destruction layers. One of the most crucial events in the history of the Southern Levant is the Babylonian destruction of Judah and its capital Jerusalem in 586 BCE, which shaped the biblical narrative and theology for generations to come. Building 100 was an extraordinarily large and rich elite building, thoroughly destroyed during the Babylonian campaign. This paper presents a study of the destruction layer excavated within the rooms of the building. FTIR spectrometry and archaeomagnetic analysis were combined in the micro-archaeological study of the remains in order to create a detailed reconstruction of the destruction event. This reconstruction sheds new light on how the Babylonian destruction was manifested in reality in the elite buildings of Jerusalem.

The north-western Negev is an under-researched ecotonal region. We excavated two late Middle Palaeolithic open-air sites and recovered rich lithic industries that could be refitted, as well as remains of fauna, and charcoal. Palaeoenvironmental information and dates indicate interesting inter-site differences.

The Kos Plateau Tuff (KPT), was an enormous caldera forming eruption originating from a vent within the Kos/Nisyros/Yali volcanic complex, occurring at 161 ka. It is the largest recognised Late Quaternary eruption in the Eastern Mediterranean. With its distinctive, highly silicic chemical composition, the resulting ash deposits have been used both as a synchronous marker for palaeoenvironmental records in the region, and to provide information on eruption processes and magnitude. Here, we describe ash layers detected at multiple sites (deep-sea sequences and a terrestrial archaeological site) with ages generated by radiometric dating and sapropel correlation, to demonstrate the existence of a later, but geochemically similar eruption from the Kos volcano which has not previously been identified in proximal volcanic units. This eruption is dated to MIS 5e (-124-129 ka), i.e. -40 kyr younger than the KPT. This tephra marks the start of MIS5e, and presents a rare opportunity to independently and precisely align paleoenvironmental records and archaeological sites during a time of rapid warming and sea level rise analogous to the present day. The presence of multiple tephras also implies the possibility of multiple eruptions during this period. This adds to our knowledge of the active and hazardous nature of Kos/Nisyros/Yali volcanic complex. (c) 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Recent excavations of Late Antiquity settlements in the Negev Highlands of southern Israel uncovered a society that established commercial -scale viticulture in an arid environment [D. Fuks et al., Proc. Natl. Acad. Sci. U.S.A. 117, 19780-19791 (2020)]. We applied target-enriched genome- wide sequencing and radiocarbon dating to examine grapevine pips that were excavated at three of these sites. Our analyses revealed centuries long and continuous grape cultivation in the Southern Levant. The genetically diverse pips also provided clues to ancient cultivation strategies aimed at improving agricultural productivity and ensuring food security. Applying genomic prediction analysis, a pip dated to the eighth century CE was determined to likely be from a white grape, to date the oldest to be identified. In a kinship analysis, another pip was found to be descendant from a modern Greek cultivar and was thus linked with several popular historic wines that were once traded across the Byzantine Empire. These findings shed light on historical Byzantine trading networks and on the genetic contribution of Levantine varieties to the classic Aegean landscape.

The excavation of Har Harif 45, a campsite radiometrically dated to the 6th5th millennia BCE, in the Negev highlands (Israel) uncovered many charcoals determined as Phoenician juniper (Juniperus phoenicea). Today, Phoenician juniper is absent from the Negev desert and can only be found on the ridges of northern Sinai (Egypt) and Jordan. Based on the relative abundance of polished stone axes and adzes found in Har Harif 45 in comparison to other contemporaneous sites, we suggest that the extinction of juniper trees from the Negev highlands was caused mainly by intensive and selective cutting of this highly beneficial woody species. On a wider view, the disappearance of Juniperus phoenicea from the Negev Desert provides a good example of human impact on the natural environment during the transition from hunter-gather societies to late Pottery Neolithic (and later periods of the 6th5th millennia BC) pastoralist societies, where a greater population density increased the demand for natural resources such as juniper wood. We show that the archaeological evidence from Har Harif 45 combined with the archaeobotanical data sheds new light on the human influence on the Negev highland environment during the late 6th and 5th millennia BC.

Charred olive pits are frequently preserved in archaeological sites in Israel, from ca. 5000 BCE. As olive fruits grow during one season, the carbon comprising their pits reflects their year of growth, making charred olive pits found in situ ideal for radiocarbon dating of archaeological contexts. An additional aspect, up until now not explored, is utilizing the ratio between the stable carbon isotopes (delta 13C) in these charred olive pits as a proxy for climate. Olive pits provide multiple advantages as a proxy, allowing for higher resolution of climate reconstruction, both spatially and temporally, reflecting the environment in which the olive trees were growing, and humans were living. Here we show firstly, an analysis of modern olive pits and assess the connection between pit cellulose delta 13C and aridity index. Specifically, we identify the threshold Delta 13C for olive trees under severe drought stress as below 15.5 +/- 0.5 parts per thousand. Next, as olive pits are usually found charred in archaeological contexts, we evaluated the effect of charring on the delta 13C signal of the modern olive pits. Finally, we present Delta 13C values of more than 500 charred olive pits from 51 archaeological sites in Israel, spanning similar to 6000 years. Based on these values we have identified periods of arid conditions and wet conditions in the past.

Vast burial fields, some with hundreds of burials, categorize the southern Levants Intermediate Bronze Age period (IBA). This phenomenon contrasts with a limited number of burials found from the preceding Early Bronze III period. This paper presents the first radiocarbon dating research of sampled bones from shaft tombs from five IBA burial sites across Israel: Yehud, Jebel Qaaqir, Sheikh-Danon, Hazorea, and Kefar-Veradim. Prescreening methods, including Fourier transform infrared analysis, were applied to identify best-preserved collagen in archaeological bones for radiocarbon dating. Overall, the measured date ranges cover the IBA timeline, supporting the observation that the IBA signature shaft tombs are a fundamental tradition of the IBA culture, at least in Israel. A single IBA shaft tomb at Jebel Qaaqir which contained remains of multiple humans, supplied different dates for various people, spanning over a few hundred years. These results suggest a tribal or family-oriented IBA community with a long-lasting tradition reflected in centuries of collective burial practices.

Routine quarrying activity at the Nesher-Ramla Quarry, in the Judean Lowlands, Israel, has recently exposed a new Early Holocene archaeological site located in a small natural sinkhole, one of many dolines scattered in the area, dated to the Early Pre-Pottery Neolithic B (EPPNB). It is the first site of this period to be uncovered in the narrow strip of land between the Judean Mts. and the coastal plain. This site, dubbed NRQN, contains lithic artifacts, groundstone tools, shells and beads as well as botanical and faunal remains. Here we combine data from a series of studies on the site's stratigraphy and radiometric dating, paleoenvironment, sediments and material culture, with the aim of understanding the role of the site in the EPPNB sphere. Various human activities took place in or immediately adjacent to the sinkhole, predominantly domestic in nature, including stone-tool making and food consumption. However, some of the sediments deep within the sinkhole underwent intense in situ combustion, possibly associated with episodes of lime-plaster production. The filling of the sinkhole appears to have occurred rapidly, not exceeding a few hundred years (ca. 10,50010,300 cal. BP) and was driven by both geogenic and anthropogenic sedimentation processes. Good preservation of microvertebrate, macrovertebrae, short-lived plants and wood remains at the site, provides a unique opportunity to study the environmental characteristics of this geographical area during the Early Holocene, which appears to have been of an open grassy landscape with patchy Mediterranean forest, resembling the current environmental conditions. Studying the characteristics of Early Holocene human activity at the site, its paleoenvironment, and the site formation mechanisms, also provides useful comparisons with the nearby NRQ Middle Paleolithic site (this issue).

Teeth are usually targeted for dating archaeological sites because they are less prone to dissolution, in com-parison with bones. However, despite this apparent resistance, teeth do undergo diagenesis, which needs to beaccounted for in order to obtain accurate ages. In particular, the uptake of trace elements such as uranium indental tissues needs to be considered for dose rate determination when dated using electron spin resonance(ESR). Characterising the mineralogy and structural integrity of samples prior to dating may thus provideimportant information related to their state of preservation, especially in the case of teeth whose U content cansignificantly affect the dose rate.In this study, we dated five teeth of small-sized bovids using combined ESR/U-series dating. They werecollected at the Middle Stone Age site of Lovedale, located in the central interior of South Africa. Micromor-phology provided sedimentary context to the samples, which were recovered from a layer of gravel rich in faunalremains. Using cathodoluminescence, laser-induced fluorescence, Fourier transform infrared spectroscopy andRaman micro-spectroscopy we assessed the degree of preservation of the enamel. Results reveal that carbonatehydroxyapatite underwent post-depositional alteration, based on its molecular structure and elemental compo-sition. Although the teeth all originate from the same layer and were sampled in the same 1-m square and at asimilar elevation, U-content in the enamel differs highly from one tooth to the other, with values ranging from1.7 to 29.6 ppm. These values are correlated with equivalent doses (De) from 228 to 923 Gy and are consistentwith variations in crystallinity determined with vibrational spectroscopy. We also investigated the possiblesaturation of the ESR signal, by repeating measurements with microwave power values from 1 to 20 mW.Despite such diversity in U-content, the ages calculated assuming an early uptake of U all fall within the samerange, from 63 ± 8 ka to 68 ± 15 ka and may only represent a minimum estimate.

Olive (Olea europaea) trees in the arid Negev Desert of southern Israel are important relicts on the ancient agricultural landscape. Among them are a cluster of several trees located in Wadi Zetan, at the heart of the Shivta horticulture terroir, with its abundant agricultural runoff remains. Two isolated olive bearing trees stand in a sheltered beneath cliff in the upper part of the wadi. Radiocarbon dating of an internal part of the trunk of one of these living trees estimates its minimum age as the mid-16th early 17th century CE (∼500 years old). Archaeological excavations conducted beneath the trees and the adjacent dam revealed OSL samples of loess accumulation dated to the Early Islamic period (8th-9th centuries CE). The stratigraphy and chronology of this sediment deposition indicate its rapid and short accumulation. Palynological analysis of the same OSL dated samples indicates that grapevines and olive trees were cultivated in the immediate vicinity of the site during the Early Islamic period. The lack of pollen of cultivated taxa from the latter part of the sequence points to cessation of the agricultural activity, probably a few hundred years later. Leaf samples for DNA profiling of the trees in comparison to other local old olive trees around the country, indicate that the trees in Wadi Zetan are genetically close to a known cultivar common among ancient olive trees. The trees have survived for at least a few hundred years, in an arid area, due to the local conditions and enhanced drainage from the man-made upper runoff system. These old olive trees bear a powerful and symbolic significance, indicating the endurance and sustainability of ancient desert runoff agriculture. Moreover, the survival of their relicts in Wadi Zetan suggests their potential as cultivars greater resilience to the harsh growing conditions of arid environments.

From 1985-2014, the Leon Levy Expedition to Ashkelon excavated a trench on the north side of Ashkelons central mound (Grid 38) exposing a Bronze and Iron Age sequence over an area of some 450 m2. By combining different radiocarbon sampling strategies used over the years of excavation, an absolute chrono-cultural scheme is constructed for the latter half of the 2nd millennium B.C.E. with a focus on the transition to the Iron Age. This chronology is then synchronized with several nearby sites.

The Byzantine funerary chapel decorated with the \u201cBirds Mosaic\u201d was discovered in 1894, during construction activities north of the city walls in Jerusalem, in the Musrara neighbourhood (Anon. 1894; Schick and Bliss 1894; Séjourné 1894; Murray 1895; Owsepian 1895; Guthe 1895; Bliss and Dickie 1898:253259). Its mosaic floor (Fig. 1), one of the best exemplars of Byzantine craftsmanship, decorated with a vine scroll springing from an amphora and populated with various birds, was accompanied by a memorial Armenian inscription (Stone 2002; CIIP I/2: No. 812).¹ A private house was built upon the findspot, as planned, and the ground-floor containing

Tel Hazor is one of only a few sites in Israel where remains of the Intermediate Bronze Age (IBA) in the second half of the 3rd millennium BC were found on top of Early Bronze III (EB III) city remains. A probe excavation was held at Hazor in 2017 to explore the chronological relation between the EB III and the IBA occupation. The radiocarbon (14C) absolute dates generated from this probe excavation show that following the EB III city demise, the site was abandoned for up to a few hundred years before it was resettled in the IBA. 14C dates obtained from the last level of the EB III city are well before 2500 BCE, fully aligned with the recent \u201cHigh Chronology\u201d for the EBA in the southern Levant. The excavation also produced dates associated with IBA \u201cBlack Wheel-Made Ware\u201d vessels, which were found in large numbers at Hazor.

The following paper presents the results of radiocarbon (14C) dating of Middle Bronze Age (MB) contexts in Jerusalem. The dates, sampled with microarchaeology methods from three different locations along the eastern slopes of the citys ancient core, reveal that Jerusalem was initially settled in the early phases of the period, with public architecture first appearing in the beginning of the 19th century BC and continued to develop until the 17th century BC. At that time, a curious gap in settlement is noted until the 16th century BC, when the site is resettled. The construction of this phase continued into the early 15th century BC. The dates presented are discussed in both the site-level, as well as their far-reaching implications regarding MB regional chronology. It is suggested here that the high chronology, dating the Middle Bronze Age between 2000 and 1600 BC is difficult to reconcile with dates from many sites. In contrast, a more localized chronology should be adopted, with the Middle Bronze Age continuing into the early 15th century BC in certain parts of the southern Levant, such as the region of Jerusalem.

In OctoberNovember 2015 and 2016, excavations were conducted at the prehistoric site of Nahal Aqev, situated in the En Avedat nature reserve in the Negev (Licenses No. G-27/2015; G-88/2016; map ref. 1820030/5244050; Fig. 1). The excavations, on behalf of the Israel Antiquities Authority and Weizmann Institute of Science, were directed by O. Barzilai and E. Boaretto, with the assistance of E. Heims (administration), M. Oron (area supervision and flint implements), S. Weiner (micromorphology), N. Porat (OSL dating), L. Weinblum and L. Regev (recording software), C. Amit (studio photography), T. Tsuk and Y. Haimi (planning and consultation) and students from the Weizmann Institute and Ben-Gurion University of the Negev.

Abstract The volcanic eruption of Santorini in the Bronze Age left detectable debris across the Mediterranean, serving as an anchor in time for the region, synchronizing chronologies of different sites. However, dating the eruption has been elusive for decades, as radiocarbon indicates a date about a century earlier than archaeological chronologies. The identification of annual rings by CT in a charred olive branch, buried alive beneath the tephra on Santorini, was key in radiocarbon dating the eruption. Here, we detect a verified annual growth in a modern olive branch for the first time, using stable isotope analysis and high-resolution radiocarbon dating, identifying down to the growing season in some years. The verified growth is largely visible by CT, both in the branchs fresh and charred forms. Although these results support the validity of the Santorini branch date, we observed some chronological anomalies in modern olive and simulated possible date range scenarios of the volcanic eruption of Santorini, given these observed phenomena. The results offer a way to reconcile this long-standing debate towards a mid-sixteenth century BCE date.

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We present here the earliest evidence for large-scale table olive production from the mid-7^th millennium BP inundated site of Hishuley Carmel on the northern Mediterranean coast of Israel. Olive pit size and fragmentation patterns, pollen as well as the architecture of installations associated with pits from this site, were compared to finds from the nearby and slightly earlier submerged Kfar Samir site. Results indicate that at Kfar Samir olive oil was extracted, while at Hishuley Carmel the data showed that large quantities of table olives, the oldest reported to date, were prepared. This process was most probably facilitated by the sites proximity to the Mediterranean Sea, which served as a source of both sea water and salt required for debittering/pickling/salting the fruit, as experimentally demonstrated in this study. Comparison of pit morphometry from modern cultivars, wild-growing trees and the archaeological sites, intimates that in pit morphology the ancient pits resemble wild olives, but we cannot totally exclude the possibility that they derive from early cultivated trees. Our findings demonstrate that in this region, olive oil production may have predated table olive preparation, with each development serving as a milestone in the early exploitation of the olive.

Recent radiocarbon (14C) research demonstrates that the urban culture of Early-Bronze III in the southern Levant ends around 2500 BC, and not around 2300 BC as was widely assumed. This should extend the Intermediate Bronze Age by 200 years. Charred olive pits from Intermediate Bronze Age contexts in the site of Khirbat el-Alya Northeast in the Judean Shephelah region (Israel) were 14C dated, resulting in calibrated dates around 2500 BC. The date range of Khirbat el-Alya Northeast samples is an indication that in the Mediterranean parts of the southern Levant, the Intermediate Bronze Age material culture appeared around the time of the decline of the preceding culture of Early-Bronze IIIaround 2500 BC or somewhat earlier. Possible Intermediate Bronze settlement pattern and the sites relation to the nearby Early-Bronze city of Tel Yarmuth are discussed based on previous Intermediate Bronze and Early-Bronze related research in the surrounding area.

The discovery of an Early Upper Palaeolithic rockshelter, Nahal Rahaf 2, in the southern Judean Desert revives the debate about whether the Levantine Aurignacian extended into the arid regions of the Southern Levant.

The Tel Yarmuth acropolis Sounding 2 was excavated during six seasons, exposing a series of levels and contexts from which material was recovered for radiocarbon dating.A total of ten samples were selected for final radiocarbon dating using either the decay counting method or the accelerator mass spectrometry method. Under the supervision of Dr Israel Carmi four samples were measured by decay counting (RT labelled samples in Tables 23.123.2) in 1998 and six were measured by Prof. Elisabetta Boaretto by accelerator mass spectrometry (AMS) with the D-REAMS accelerator (RTD labelled samples in Tables 23.1 and 23.3) in 2013.

Far'ah II is an open-air site in the north western Negev desert (Israel). Previous excavations in the 1970's revealed a rich, in situ Middle Paleolithic (MP) assemblage composed of flint and limestone artifacts, animal bones and charcoal. Renewed excavation at the site were undertaken in 2017, to re-date it and provide a more accurate constrain to the sites' age, as well as collect samples for paleoclimatic proxies. Our new Optically Stimulated Luminescence and C-14 ages together with the stable oxygen isotope signature of the loess sediments, constrain the age of the upper archaeological horizon to

Pottery kilns are usually recognizable in the archaeological record based on their prominent and characteristic architectural features, evidence of exposure to high temperatures and associated waste products. Here we describe how we identified a kiln that has no readily recognizable architectural features, but does have an upper chamber full of broken pottery, and a lower chamber full of ash. The typology of the pottery in the upper chamber and radiocarbon dating show that the kiln was constructed after around 600 CE and was used until the early 7th century. The confining structures around these two chambers are sediments, some of which were deliberately brought to the site. A detailed study of the section through the kiln using on-site and off-site microarchaeological techniques revealed much about the firing conditions. The ash is composed almost entirely of phytoliths with a small amount of calcite. Surprisingly the diversity of phytolith morphotypes identified was low, and many of the phytoliths are unusually large multicells. The phytolith analysis shows that the fuel was mainly the stalks/chaff of domesticated grasses, most probably wheat, and probably not animal dung. Many of the phytolith morphologies are distorted and charred due to exposure to high temperatures, and show birefringence. Infrared spectra show that the phytoliths have partially recrystallized into the high temperature silicate mineral cristobalite. Slags formed close to the inner surfaces of the confining sediments presumably from melted phytoliths, and some of the clay-rich sediment close to these surfaces is clearly heat altered. These observations show that the temperatures in the firing chamber ranged from around 700 to 900 °C. The calcite in this ash is extremely disordered at the atomic level, based on the grinding curve analysis. A partial reconstruction of the kiln structure shows that the pottery chamber is above the firing chamber, and there is no constructed partition that separates the two chambers. The identification and characterization of this unusual kiln depended significantly on the use of the microarchaeological approach.

Radiocarbon (C-14) dating of anthropogenic carbonates (CaCO3) such as ash, lime plaster and lime mortar, has proven a difficult task due to the occurrence of a number of contaminants embedded within the CaCO3 pyrogenic binder. These include C-14-free geologic components and/or secondary phases bearing an unknown amount of C-14, and thus the alteration of the original pyrogenic isotopic signature of the material results in major age offsets when carbon recovery is performed through acid hydrolysis. Here we present a characterization/quantification approach to anthropogenic carbonates that includes Fourier transform infrared spectroscopy (FTIR), X-ray diffraction, thin section petrography, thermogravimetric analysis and scanning electron microscopy coupled with high-resolution cathodoluminescence, with which we identified the pyrogenic CaCO3 fraction in an aerial lime plaster and two hydraulic mortars. The preserved pyrogenic component was then isolated by density separation and its purity checked again using FTIR. Carbon was recovered through thermal decomposition in vacuum. The resulting C-14 age matches the expected age of the lime plaster, whereas hydraulic mortars are slightly offset due to the carbonation of calcium hydroxide lumps. This approach highlights the importance of a dedicated characterization strategy prior to dating and may be applied to aerial lime plasters to obtain accurate ages.

The ongoing increase in human population and the subsequent freshwater demands raise conflicts regarding conservation of riparian ecosystems. Identifying anthropogenic effects on these vulnerable nature resources is crucial for preventing future damages. Here we measured tree-ring width and isotopic carbon composition (delta C-13) in stem wood of protected Platanus orientalis trees at the Kziv Nature Reserve, a Mediterranean riparian ecosystem in northern Israel. In this reserve, water was pumped for human needs during 1976-2006 from the major spring feeding the stream. We show a negative exponential correlation between stem growth and pumped water amounts. Spring drawdown had a significant negative effect on growth even in years when amounts were reduced to similar to 2.10(6)m(3) year(-1), leveling off at around 5.10(6) m(3) year(-1). Precipitation and spring volume effects on growth were exposed only after pumping stopped, further indicating its role in inhibiting tree growth. During the pumping years, stem wood delta C-13 was up to 1.8%0 higher than after pumping cessation, indicating the drought stress imposed on trees. Our results provide an unequivocal evidence for the adverse effect of water pumping on riparian Platanus orientalis tree growth. Such effects, and their related tree mortality risk, must be considered in sustainable water management planning.

In the Mediterranean basin, diffuse-porous, semi-ring-porous and ring-porous tree species coexist in the same regions. Climate change might differently affect these types, but a mechanistic understanding of drought effects on their xylem structure is lacking. We investigated tree-ring width and xylem functional traits in ring-porous Quercus boissieri, semi-ring-porous Q. ithaburensis and diffuse-porous Q. calliprinos, at xeric (Galilee) and mesic (Golan) sites in the South-Eastern Mediterranean basin. We quantitatively assessed how dry and wet years affect growth and xylem traits in different porosity type oaks, and evaluated whether porosity type is preserved or altered during these years. We measured, counted or computed tree-ring width, vessel number, maximum lumen area, frequency, tree-ring and xylem theoretical hydraulic conductivity along 40-year ring series of 50 trees in total. We also quantified ring porosity in each year using two indices, the Gini coefficient and the porosity ratio of vessel area, and described vessel area intra-ring variations by distribution profiles. We then compared these parameters in the live driest and live wettest years of the 40-year period. Radial growth and functional trait variations were more similar between species in the same site (strong drought effects in Q. ithaburensis and Q. calliprinos in Galilee, moderate effects in Q. boissieri and Q. calliprinos in Golan) than between sites for the same species (Q. calliprinos was more affected in Galilee than in Golan). Ring porosity indices and distribution profiles showed that diffuse-porous xylem structure of Q. calliprinos was maintained even under dry conditions at both sites. However, Q. boissieri xylem shifted from ring-porous in wet and normal years to semi-ring-porous in dry years, i.e. the porous ring cannot be completely built under water constraint. This suggests that ring porous strategy, typical of temperate regions with strong seasonality, might not be realized under future drier conditions in the Mediterranean basin. (C) 2019 Elsevier B.V. All rights reserved.

The Central Balkans, in present-day Serbia, was a potentially dynamic zone during the Middle and Upper Paleolithic (MP-UP), as it is situated between hypothesized dispersal routes of modern humans and refuges of late Neanderthals. However, the population history of the region remains poorly understood because there are lithe chronometric data from Late Pleistocene sites in Serbia. Here, we review the existing paleoanthropological record for the MP-UP in the Central Balkans and surrounding areas. Then, we add to it by reporting radiocarbon dates from two Serbian cave sites, Pegturina and Hadzi Prodanova, which contain Middle Paleolithic and Gravettian assemblages. The results provide reliable human occurrence-dates older than 39 ka calibrated radiocarbon years before present (cal BP) and between 34 and 28 ka cal BP. As shallow palimpsest deposits with low artifact yields, the sites are not ideal contexts for establishing chrono-cultural stratigraphy. However, it is proposed that the occupants before 39 ka cal BP were Neanderthals producing MP artifacts, while those after 34 ka cal BP were modern humans with Gravettian traditions.

A magnificent new jewelry hoard was uncovered on July 11, 2010 in Area H of the northwestern sector of Tel Megiddo. This site in the Jezreel Valley (Israel) is one of the most important in the southern Levant thanks to four archaeological expeditions that have thoroughly excavated the mound and rapidly published the results of their digs (Ussishkin 2018). All expeditions unearthed hoards of different types from the Late Bronze and Iron Ages (Hall 2016). This new hoard was unearthed in a destruction debris, securely dated to the Early Iron Age I, ca. 1070 BCE (local Level H-11, which equals University of Chicagos Stratum VIIA). During this period, part of a building (remnants of two rooms and an inner courtyard surrounded by three large open courtyards) was found in this area (figs. 12; Finkelstein et al. 2017: 26769). The building is positioned only about 30 m from Canaanite Palace 2041 of the city of Stratum VIIA. This article offers a preliminary publication of the hoard; a full report will soon be published in the Megiddo VI volume (Arie forthcoming a).

The historic event of the Late Antique Little Ice Age (LALIA) was recently identified in dozens of natural and geological climate proxies of the northern hemisphere. Although this climatic downturn was proposed as a major cause for pandemic and extensive societal upheavals in the sixth-seventh centuries CE, archaeological evidence for the magnitude of societal response to this event is sparse. This study uses ancient trash mounds as a type of proxy for identifying societal crisis in the urban domain, and employs multidisciplinary investigations to establish the terminal date of organized trash collection and high-level municipal functioning on a city-wide scale. Survey, excavation, sediment analysis, and geographic information system assessment of mound volume were conducted on a series of mounds surrounding the Byzantine urban settlement of Elusa in the Negev Desert. These reveal the massive collection and dumping of domestic and construction waste over time on the city edges. Carbon dating of charred seeds and charcoal fragments combined with ceramic analysis establish the end date of orchestrated trash removal near the mid-sixth century, coinciding closely with the beginning of the LALIA event and outbreak of the Justinian Plague in the year 541. This evidence for societal decline during the sixth century ties with other arguments for urban dysfunction across the Byzantine Levant at this time. We demonstrate the utility of trash mounds as sensitive proxies of social response and unravel the time-space dynamics of urban collapse, suggesting diminished resilience to rapid climate change in the frontier Negev region of the empire.

The Late Bronze Age to Iron Age transition in the Levant includes the appearance of new material culture that is similar in styles to the Aegean world. In the southern Levant, the distribution of early styles of Aegean-like pottery, locally produced, is limited to the coastal areas of Canaan, making synchronization with the rest of the region difficult. Radiocarbon (C-14) dating provides a high-resolution absolute chronological framework for synchronizing ceramic phases. Here, absolute C-14 chronologies of the Late Bronze to Iron Age transition in the sites Tel Beth Shean, Tel Rehov, Tel Lachish, and Tel Miqne-Ekron are determined. Results show that the ranges of transitions vary in an absolute time frame by 50-100 years between different sites and that the range of the Late Bronze Age to Iron Age transition in Canaan spans the 13th-11th centuries BC plateau. These chronologies, based on a site-by-site approach for dating, show that the change between early types of Aegean-like pottery (Monochrome) to developed types (Bichrome), occurred over 100 years in Canaan and that the transition occurred in southern sites prior to sites in the north. These ranges show that not only is the Late Bronze to Iron Age not contemporaneous, but also synchronization between sites based on their ceramic assemblages is problematic.

The site of el-Wad Cave, and especially the adjacent terrace, is one of the deepest and most complex Natufian sites in the Mediterranean Levant. The northeast terrace of el-Wad has been excavated by us since 1994, revealing a rich Late Natufian layer and thick, multi-phased Early Natufian deposits. Here we focus on the 20072012 excavation seasons at el-Wad Terrace (EWT) and provide a detailed, updated account of the stratigraphy, sedimentology and dating of the site, the abundant Early Natufian architectural features and lithics, the ground stone tools assemblage and a primary burial of an adult woman. The Late Natufian appears as a relatively thin layer devoid of architectural features but containing a concentration of graves. Below it are thick Early Natufian sediments. Their upper part displays a few stone features. Their lower attained part represents the main \u201carchitectural stage\u201d of the site. Architectural remains consist of a terrace wall and smaller walls, as well as stony floors, some of which abut the walls and likely constitute structure remains. Other features include large heaps of stones, lithics and bones, smaller stone installations (typically circles or pits), and distinct concentrations of finds or sediment patches.The sediments ofEWT are the result of complex depositional and post depositional processes. Various geoarchaeological data, including magnetic susceptibility and micromorphological analyses of the sediments indicate intensive in-situ anthropogenic activity such as fire use and/or trampling, especially in the architectural stage.A large Early Natufian lithic sample from the two phases of the main architectural stage is described here in relation to its architectural context and through time. The ratios of tools, the distribution of the main tool categories, the dominance of lunates and Helwan retouch amongst the microliths, and the wealth of burins of various types resemble those of other Early Natufian assemblages. No temporal trends are apparent but a peak in flint densities was identified, coinciding with the transition between the two architectural phases. Additionally, the excavation has yielded one of the largest Natufian ground stone tool assemblages, encompassing nearly a thousand ground stone tools and tool fragments. The assemblage shows no noticeable differences between the Early and Late Natufian. These assemblages highlight the dominance of pestles and the related preference for compact basalt used to produce these items. Pestle discard patterns reflect the clear removal of the pestle active ends from the site in both periods.Our excavation results bring to light the existence of a massive and repeatedly (perhaps continuously) occupied living compound at the site during the Early Natufian. The good preservation of numerous architectural levels enabled us to study the artifactual assemblages in great detail, both temporally and spatially. Studies of different materials all show that items that went out of use were discarded within the Natufian living compound and underwent complex taphonomic processes by human action (primarily fire use and trampling) and geogenic processes. While changes in site use (especially building activities vs. interments) are apparent throughout the sequence, changes in material culture are less obvious. Overall, the deep Natufian sequence presented here, with the repeated structure construction, numerous features, huge densities of finds and ample indications for intensive, recurring habitations mark EWT as a significant Natufian hamlet, one of the few major hamlets in the Mediterranean zone during the Early Natufian.

Pits and silos are storage features that often occur at prehistoric archaeological sites. Their shape, size and content may show a large degree of variability, and their function may be related to a number of behaviors that can provide valuable insight into the occupational history of a site. Such structures are usually investigated through the study of their macroscopic content, which may include stone, ceramic and metal artifacts, charred remains, and plant material in the case of good preservation conditions. However, pits and silos are generally characterized by complex life cycles that encompass also the partial or total removal of fill deposits, and the reuse of earlier structures, which hinder a proper interpretation of their function. This requires the application of a microarchaeological approach to the study of the sedimentary matrix of fill deposits, especially when macroscopic remains are absent or not uniquely related to a specific human activity. Here we present the study of a series of pits from the Late Bronze Age levels at Ashkelon, Israel, which were characterized by multiple fills layers. Using a combination of infrared spectrometry, phytolith analysis, and micromorphology of sediments, we show that one of the pits was used as grain silo and maintained through time. Radiocarbon dating of charred wheat seeds recovered from the primary depositional context thus identified caused a fundamental re-evaluation of the stratigraphy of the excavation area and a better understanding of its chronology.

Flint is one of the most common rock types used for producing stone tools. During flint knapping huge amounts of microscopic sized flint particles are produced. Thus the presence of high concentrations of microflint in a sedimentary layer, could be a good indication that flint was knapped at that location. We have developed and tested a method for quantification of microflint concentrations in sediments. The method involves concentrating the microflints in specific density fractions, and then counting a representative proportion of the flint fragments using a polarized light microscope. We show that the method successfully identifies a knapping layer in an Initial Upper Palaeolithic level at the site of Boker Tachtit, Israel. This level also contains macroscopic flint debitage, including refitted artifacts. Microflint quantification can aid in identifying knapping areas and be useful for better understanding site formation processes. (C) 2018 Elsevier Ltd. All rights reserved.

Excavations at Huqoq in Israel's eastern Lower Galilee are bringing to light a Late Roman synagogue, a medieval public building, and the remains of ancient and modern (pre-1948) villages. In this interim report, we describe the major discoveries of the 20142017 seasons, including the extraordinary figural mosaics decorating the synagogue floor. Our discoveries provide evidence of a Galilean Jewish community that flourished through the 5th and 6th centuries C.E.a picture contrasting with recent claims of a decline in Jewish settlement under Byzantine Christian rule. The possibility that the medieval public building might also be a synagogue has important implications for understanding Galilean Jewish settlement in the Middle Ages, about which almost nothing is known. The excavations also shed light on the last phase of the settlement's long history: the development of the modern village of Yakuk in the 19th through 20th centuries.

The Late Epipalaeolithic Natufian (similar to 14,600 - 11,500 cal BP) is a key period in the prehistory of southwest Asia. Often described as a complex hunting and gathering society with increased sedentism, intensive plant exploitation and associated with an increase in artistic and symbolic material culture, it is positioned between the earlier Upper-and Epi-Palaeolithic and the early Neolithic, when plant cultivation and subsequently animal domestication began. The Natufian has thus often been seen as a necessary pre-adaptation for the emergence of Neolithic economies in southwest Asia. Previous work has pointed to the Mediterranean woodland zone of the southern Levant as the 'core zone' of the Early Natufian. Here we present a new sequence of 27 AMS radiocarbon dates from the Natufian site Shubayqa 1 in northeast Jordan. The results suggest that the site was occupied intermittently between similar to 14,600 - 12,000 cal BP. The dates indicate the Natufian emerged just as early in eastern Jordan as it did in the Mediterranean woodland zone. This suggests that the origins and development of the Natufian were not tied to the ecological conditions of the Mediterranean woodlands, and that the evolution of this hunting and gathering society was more complex and heterogeneous than previously thought.

Chemical analyses of ancient organic compounds absorbed into the pottery fabrics from sites in Georgia in the South Caucasus region, dating to the early Neolithic period (ca. 6,000-5,000 BC), provide the earliest biomolecular archaeological evidence for grape wine and viniculture from the Near East, at ca. 6,000-5,800 BC. The chemical findings are corroborated by climatic and environmental reconstruction, together with archaeobotanical evidence, including grape pollen, starch, and epidermal remains associated with a jar of similar type and date. The very large-capacity jars, some of the earliest pottery made in the Near East, probably served as combination fermentation, aging, and serving vessels. They are the most numerous pottery type at many sites comprising the so-called "Shulaveri-Shomutepe Culture" of the Neolithic period, which extends into western Azerbaijan and northern Armenia. The discovery of early sixth millennium BC grape wine in this region is crucial to the later history of wine in Europe and the rest of the world.

Insoluble bone collagen is one of the most common materials used for high-resolution radiocarbon (14C) dating. Unfortunately, in some bones, poor preservation of the insoluble collagen excludes the possibility of dating. During the burial of the bone the collagen sometimes degrades into peptides. These peptides are soluble in the acid used to dissolve the bone mineral. It is known that under appropriate conditions, collagen has the ability to self-assemble. Here we exploit this capability and present a method for reassembling the soluble collagen peptides in archaeological bones and dating them. We treated the acid fraction generated during the demineralization of the bone by desalting and neutralizing the solution by dialysis. During the dialysis, the soluble collagen peptides reassemble and precipitate in the dialysis bag. We used FTIR spectroscopy to determine that the precipitated material is indeed collagen. The 14C dates obtained from the reassembled collagen were compared to the dates of "standard" insoluble collagen, extracted in parallel from the same bone. Although there are some divergences of the dates, 3 out of 10 samples could have been dated only by the reassembled collagen. This shows that collagen peptides reassembly can be a valuable tool for dating bones with little or no insoluble collagen.

Archaeological surveys of the Negev Highlands show that the settlement history of this arid environment oscillated widely over time. This observation is almost entirely based on scant sherd assemblages from surveys, with only a few chronometric ages from one or two archaeological features at a given site. The reasons for the scarcity of chronometric ages include insufficient attention to radiocarbon dating in past research, low amounts of datable organic material for radiocarbon dating and issues related to low rate of site accumulation, and incomplete preservation of activity remains. In order to overcome these problems, we present here the results of a detailed chronometric radiocarbon and optically stimulated luminescence (OSL) dating study exploring the development of Negev archaeological sites in the third millennium BCE. The study included micromorphological analyses to aid identification of sedimentological and post-depositional processes at the studied sites. At Nahal Boqer 66, one of many small Negev third millennium BCE sites, seven radiocarbon ages were determined from archaeological contexts that suggest repeated discontinuous activity throughout the Early Bronze (EB) and early part of the Intermediate Bronze Age (IBA) (c. 33002350 BCE). At Ein Ziq one of a few large sites in the region seven samples were dated; they show a very short period of activity in the beginning of the IBA (c. 24502200 BCE). OSL age determinations at this site provided evidence for the rapidity of site burial by sediment accumulation. Also, OSL ages from secure depositional contexts verified via micromorphology are in agreement with those obtained by radiocarbon dating. Taken together, the results provide new systematic evidence for the timing of EBIBA activity in the arid Negev Highlands.

The Pre-Pottery Neolithic B (PPNB) is the first period in human cultural evolution that is characterized by the extensive production of lime plaster for architectural, decorative and ritual purposes. The production of large quantities of lime plaster requires the operation of a lime kiln, a structure where limestone cobbles are heated to high temperatures (> 600 degrees C) to obtain quicklime, which is then mixed with water to form a moldable lime putty. However, little is known about lime kilns and plaster production processes during the PPNB. This may be because the technology used at that time was simple and left few traces that are unique to lime plaster production. These include combustion features rich in lime plaster and heat-altered sediments, which are difficult to identify through only a visual inspection of the archaeological context. Here we report the study of a small sinkhole at the Nesher-Ramla quarry in Israel, which yielded Early PPNB artifacts. Using infrared spectrometry and micromorphology of sediments, we identified in-situ deposits of heat-altered sediments rich in fragments of burnt limestone, lime plaster, and wood ash in the form of charcoal, phytoliths and siliceous aggregates, which are features consistent with the operation of a lime kiln. Charred botanical remains were characterized and used for radiocarbon dating, which determined the age of the site at 10,400 cal BP. We therefore conclude, based on the examination of the microscopic archaeological record, that this sinkhole was used as a lime kiln during the Early PPNB.

Objectives: Early evidence for the treatment of dental pathology is found primarily among food-producing societies associated with high levels of oral pathology. However, some Late Pleistocene hunter-gatherers show extensive oral pathology, suggesting that experimentation with therapeutic dental interventions may have greater antiquity. Here, we report the second earliest probable evidence for dentistry in a Late Upper Paleolithic hunter-gatherer recovered from Riparo Fredian (Tuscany, Italy). Materials and Methods: The Fredian 5 human consists of an associated maxillary anterior dentition with antemortem exposure of both upper first incisor (I¹) pulp chambers. The pulp chambers present probable antemortem modifications that warrant in-depth analyses and direct dating. Scanning electron microscopy, microCT and residue analyses were used to investigate the purported modifications of external and internal surfaces of each I¹. Results: The direct date places Fredian 5 between 13,000 and 12,740 calendar years ago. Both pulp chambers were circumferentially enlarged prior to the death of this individual. Occlusal dentine flaking on the margin of the cavities and striations on their internal aspects suggest anthropic manipulation. Residue analyses revealed a conglomerate of bitumen, vegetal fibers, and probable hairs adherent to the internal walls of the cavities. Discussion: The results are consistent with tool-assisted manipulation to remove necrotic or infected pulp in vivo and the subsequent use of a composite, organic filling. Fredian 5 confirms the practice of dentistryspecifically, a pathology-induced interventionamong Late Pleistocene hunter-gatherers. As such, it appears that fundamental perceptions of biomedical knowledge and practice were in place long before the socioeconomic changes associated with the transition to food production in the Neolithic.

New discoveries of legumes in the lower Galilee at the prehistoric site of Ahihud in Israel shed light on early farming systems in the southern Levant. Radiocarbon dating of twelve legumes from pits and floors indicate that the farming of legumes was practiced in southern Levant as early as 10.240-10.200 (1 sigma) ago. The legumes were collected from pits and other domestic contexts dated to the Early Pre-Pottery Neolithic B. The legumes identified include Vicia faba L. (faba bean), V. ervilia (bitter vetch), V. narbonensis (narbon vetch), Lens sp. (lentil), Pisum sp. (pea), Lathyrus inconspicuus (inconspicuous pea) and L. hirosolymitanus (jerusalem vetchling). Comparison with coeval sites in the region show how the presence of peas, narbon vetches, inconspicuous peas, jerusalem vetchlings and bitter vetches together with faba bean and lentils is unique to the Pre-Pottery Neolithic, and might indicate specific patterns in farming or storing at the onset of agriculture.

New radiocarbon dates are reported for Late Middle Paleolithic (MP) layers of Ciemna and Oblazowa Caves in Southern Poland. The sites present methodological challenges for radiocarbon dating related to post-depositional mixing, materials preservation, and radiocarbon measurements near the detection limit. We describe strategies to address these issues, which allowed for estimation of the timing of lithostratigraphic layers. At Ciemna, bones associated with LateMP artifacts are older than 50 ka. At Oblazowa, bones associated with LateMP artifacts produced dates 50-45 ka cal BP and a possible Szeletian phase occurred sometime 45-39 ka cal BP. These new dates add to the regional chronology and strengthen the case that a number of distinct archaeological industries appeared in Southern Poland and Moravia during Marine Isotope Stage 3. (C) 2016 Elsevier Ltd. All rights reserved.

Obtaining accurate age determinations from minerals in archaeological ash is a major unsolved issue in radiocarbon (¹⁴C) dating. This is because the original¹⁴C content of calcite, the main component of ash, is altered by isotopic exchange. Pyrogenic aragonite, another mineral phase recently discovered in ash, might preserve its¹⁴C signature through time. Using a new method based on density separation and step combustion, we were able to isolate and date aragonitic ash from an archaeological destruction horizon of known age. Here we show that the¹⁴C age of aragonite matches the age of the destruction horizon. Our results demonstrate that pyrogenic aragonite is a short-lived material suitable for¹⁴C dating and directly related to human activities involving the use of fire, thus bearing major implications for the establishment of absolute chronologies for the past 50,000 yr.

Phytolith-rich layers in archaeological sites constitute well defined stratigraphic horizons that would be invaluable if absolutely dated. Previous attempts to radiocarbon date phytoliths produced inconsistent results using plants with known ages. In this study a new approach to extract and analyze the silica occluded carbon was tested on well-dated archaeological contexts in Beth Shemesh and Tell es-Safi/Gath, and on modern wheat plants that grew in a controlled environment. Results show that by dissolving the silica using mild conditions, phytolith insoluble fractions can be extracted and their radiocarbon contents analyzed reproducibly. After phytolith dissolution, the remaining insoluble fractions with 1030%C have radiocarbon concentrations that are statistically similar to associated charred seeds (within 2σ), and insoluble fractions with 40%C show concentrations that are identical to the seeds. These results show that the insoluble fraction of phytoliths is a suitable material for answering chronological questions.

The understanding of crop domestication is dependent on tracking the original geographical distribution of wild relatives. The faba bean (Vicia faba L.) is economically important in many countries around the world; nevertheless, its origin has been debated because its ancestor could not be securely identified. Recent investigations in the site of el-Wad (Mount Carmel, Israel), provide the first and, so far, only remains of the lost ancestor of faba bean. X-ray CT scan analysis of the faba beans provides the first set of measurements of the biometry of this species before its domestication. The presence of wild specimens in Mount Carmel, 14,000 years ago, supports that the wild variety grew nearby in the Lower Galilee where the first domestication was documented for Neolithic farmers 10,200 years ago.

Three engraved limestone plaquettes from the recently excavated Epipaleolithic open-air site Ein Qashish South in the Jezreel Valley, Israel comprise unique evidence for symbolic behavior of Late Pleistocene foragers in the Levant. The engravings, uncovered in Kebaran and Geometric Kebaran deposits (ca. 23ka and ca. 16.5ka BP), include the image of a bird- the first figurative representation known so far from a pre-Natufian Epipaleolithic-along with geometric motifs such as chevrons, crosshatchings and ladders. Some of the engravings closely resemble roughly contemporary European finds interpreted as "systems of notations" or "artificial memory systems"-records related to timing of seasonal resources and associated aggregation events of nomadic groups. Moreover, similarly looking signs and patterns are well known from the context of the local Natufian-a final Epipaleolithic culture of sedentary or semi-sedentary foragers who started practicing agriculture. The investigation of the engravings found in Ein Qashish South involves conceptualizations developed in studies of European and local parallels, a selection of ethnographic examples and preliminary microscopic observations of the plaquettes. This shows that the figurative and non-figurative images comprise a coherent assemblage of symbols that might have been applied in order to store, share and transmit information related to social and subsistence realms of mobile bands. It further suggests that the site functioned as a locality of groups' aggregation and indicates social complexity of pre-Natufian foragers in the Levant. While alterations in social and subsistence strategies can explain the varying frequency of image use characterizing different areas of the Late Pleistocene world-the apparent similarity in graphics and the mode of their application support the possibility that symbol-mediated behavior has a common and much earlier origin.

The Holocene sequence of the Kebara wetlands, a groundwater-surface water interaction zone ecosystem, was studied in a borehole (Core A), retrieved from the eastern trough of the Carmel coast of Israel. A multi-proxy approach was used for environmental reconstruction, and new ages were added for reassessment of the chronology. The fauna (mainly ostracods), flora, and palaeo-salinity estimates indicate marginal wetland that experienced shrinkage and enlargement, reflecting changing hydrological and climatic conditions. New luminescence ages of sediments and radiocarbon dating of terrestrial seeds in the upper part of the sequence provide a more reliable and accurate chronology. The lower part of the core, between about 14,000 and about 7000 BP, indicates mainly wetter conditions, while the upper part, dated to the last 7000 BP, suggests drier conditions in general, with a few wetter episodes. The almost total disappearance of the fauna in the core after about 6000 BP is in agreement with regional climate records that document increasing aridity in the Levant. A comparison of modern δ¹⁸O and δ¹³C (water and ostracod) values from the Timsah ponds, the present remnants of the wetland, with the values derived from ostracods in the drilling indicates that, like today, the past wetlands were fed mainly by the karstic carbonate-rich Yarkon-Taninnim mountain aquifer. This paper emphasizes the importance of understanding the sources of the water feeding the wetlands for the re-assessment of previous chronology that was based on total organic carbon (TOC) ¹⁴C dating.

Ciemna Cave is one of the most important archaeological sites documenting Middle Palaeolithic settlement in Central Europe. It has been excavated since the beginning of the 20^th century, providing rich materials commonly known for their bifacial component linked with the Micoquian. Since 2007 a new project has been underway focusing on the Main Chamber, which had so far been unexplored. The outcome is a much more complex picture environmental context and cultural affinities of the site. This article aims to present key questions concerning the record in the Main Chamber, but also to propose a new interpretation of Ciemna Cave as an extensive, diversified cave system. Using 3D modelling of the bedrock of cave systems surrounding area, we propose that dynamic filling of the cave impacted settlement there. It was proved also that the sediments in the Main Chamber are homogenous, which enables radiocarbon dating of the undisturbed sequence layers. Although new radiocarbon determinations were made using state-of-the-art pretreatment methods, we still could not fully resolve the problem of dating the upper part of the section, due to age-limit of this method.

Even though the faba bean (Vicia faba L.) is among the most ubiquitously cultivated crops, very little is known about its origins. Here, we report discoveries of charred faba beans from three adjacent Neolithic sites in the lower Galilee region, in the southern Levant, that offer new insights into the early history of this species. Biometric measurements, radiocarbon dating and stable carbon isotope analyses of the archaeological remains, supported by experiments on modern material, date the earliest farming of this crop to ∼10,200 cal BP. The large quantity of faba beans found in these adjacent sites indicates intensive production of faba beans in the region that can only have been achieved by planting non-dormant seeds. Selection of mutant-non-dormant stock suggests that the domestication of the crop occurred as early as the 11 th millennium cal BP. Plant domestication| Vicia faba L.| Pre-Pottery Neolithic B| radiocarbon dating| Δ13 C analysis.

Feasting events may serve a diverse set of social, political and/or economic functions. Acknowledgement of the important role they played in past societies is reflected in the plethora of publications reporting occurrences of feasting in the Levantine archaeological record. These range in time from the Epi-Paleolithic through the Iron Age and have been reported primarily from ritual contexts (e.g., Goring-Morris and Horwitz 2007; Lev-Tov and McGeough 2007; Zuckerman 2007; Twiss 2008; Ben-Shlomo et al. 2009; Munro and Grosman 2010; London 2011).

The establishment of an absolute chronology for the Late Bronze and Iron Ages in the southern Levant would make it possible to use changes in material culture in order to study the impact of trade, dissemination of knowledge, and the impact of climate on historical processes. To achieve this, a detailed absolute chronology is needed for individual sites and on a regional scale with a resolution that can differentiate events within a century. To realize this challenging goal, only samples from well-established primary contexts ought to be studied. Such primary contexts (with \u201cdating assemblages\u201d) can be identified by combining macroscopic with microscopic observations. Chronological studies at the sites of Qubur el-Walaydah, Tel es-Safi, and in particular, Megiddo, demonstrate that high-resolution dating can be achieved, with very few outliers in the data sets. The major limitation on applying this approach is the fact that we are currently constrained to dating short-lived samples (charred seeds and olive pits) and collagen from bones. Thus, an immediate goal of radiocarbon research is to develop the ability to date other short-lived materials, such as organic material occluded in siliceous plant phytoliths, wood ash, and possibly organic residues preserved in pottery vessels.

The history of lake-level changes at the Dead Sea during the Holocene was determined mainly by radiocarbon dating of terrestrial organic debris. This article reviews the various studies that have been devoted over the past 2 decades to defining the Dead Sea levels during the Bronze and Iron Ages (~5.5 to 2.5 ka cal BP) and adds new data and interpretation. In particular, we focus on research efforts devoted to refining the chronology of the sedimentary sequence in the Zeelim Gully, a key site of paleoclimate investigation in the European Research Council project titled Reconstructing Ancient Israel. The Bronze and Iron Ages are characterized by significant changes in human culture, reflected in archaeological records in which sharp settlement oscillations over relatively short periods of time are evident. During the Early Bronze, Intermediate Bronze, Middle Bronze, and Late Bronze Ages, the Dead Sea saw significant level fluctuations, reaching in the Middle Bronze an elevation of ~370 m below mean sea level (bmsl), and declining in the Late Bronze to below 414 m bmsl. At the end of the Late Bronze Age and upon the transition to the Iron Age, the lake recovered slightly and rose to ~408 m bmsl. This recovery reflected the resumption of freshwater activity in the Judean Hills, which was likely accompanied by more favorable hydrological-environmental conditions that seem to have facilitated the wave of Iron Age settlement in the region.

Jordan River Dureijat (JRD), an Epipaleolithic site on the banks of the Jordan River south of its outlet from the Hula Valley, was discovered as a result of a drainage operation in the year 1999. The site, located 1.2 km north of the Benot Ya'aqov Bridge, is 14 C dated to between 14,000 and 15,000 Cal BC. This paper presents the results of a survey and test excavation conducted during the summer of 2002 and their bearing on our understanding of the Epipaleolithic of the region, of which very little is known to date. As with all sites on the banks of the Jordan River in this vicinity, the sediments of JRD show exceptional preservation of organic remains, in particular, botanic finds. The paper describes the chronology of the site, the lithic assemblage, the fauna with special emphasis on the fish and mollusc remains, and the seeds and fruits retrieved from this preliminary excavation. The findings obtained from JRD have already yielded a wealth of environmental data and contributed significantly to our understanding of human presence in the region. Jordan River Dureijat - A New Epipaleolithic Site in the Upper Jordan Valley. Available from: https://www.researchgate.net/publication/292984156_Jordan_River_Dureijat... [accessed Jul 27, 2017].

Mediterranean landscapes have been characterized by the ongoing interaction between natural processes and anthropogenic activities over several thousands of years. However, separating the relative contributions of these two factors in shaping the landscape has proved to be difficult. With reference to three excavated probes located in the environs of the archaeological site of Tell es-Safi/Gath (central Israel), we outline a methodological approach that may aid in distinguishing between the impact of natural and anthropogenic agencies on the accumulation of sediment fills. We conclude that at Tell es-Safi/Gath, natural geomorphic processes were the major factors that shaped the landscape, but anthropogenic activity is expressed in a brief period of time as evidenced by a high sedimentation rate, combined with high δ13C values, a relatively high quantity of phytoliths, and a high concentration of charred particles. This anthropogenic signature is interpreted as resulting from the destruction of the site by Hazael, King of Aram Damascus (ca. late 9th century BCE). This research demonstrates how high-resolution multi-disciplinary sampling of probes for dating, C isotopic composition, phytolith characterization, pollen analysis and assessment of sedimentation rates, in combination with the study of human cultural history at an archaeological site, may facilitate the distinction between natural and anthropogenic causes of sedimentation.

Wood ash found at archaeological sites is the most direct evidence of the presence of combustion features. The preservation of wood ash within archaeological deposits is often poor due to diagenetic processes and therefore its identification requires the use of spectroscopic methods. FTIR spectrometry is able to detect the main calcite component of wood ash, unless this is mixed with other calcitic phases of geologic origin. Using FTIR spectrometry we identified non-biogenic aragonite in archaeological heat-altered sediments and lime plasters. The presence of aragonite in such conditions is unusual, as it is unlikely to crystallize at ambient temperatures and pressures or in absence of Mg. The experimental conditions which favor the nucleation of this aragonite phase were investigated with FTIR spectrometry, XRPD and SEM imaging of modern lime plaster and quicklime samples prepared in the laboratory using different calcium carbonate starting materials. We show that aragonite forms at ambient temperatures and pressures upon carbonation of calcium oxide and calcium hydroxide together with calcite and its nucleation and growth are influenced by environmental parameters, such as carbon dioxide partial pressure, relative humidity and temperature. This pyrogenic aragonite is a reliable indicator for calcareous materials exposed to temperatures above 600°C, and therefore it can be used to determine the presence of heat-altered sediments and ash in the absence of structured combustion features. This mineral phase could have applications in radiocarbon dating as well.

Cooking installations are among the most abundant features in Bronze and Iron Age archaeological sites in the southern Levant, yet until now their study has been mostly descriptive. We present a study of 11 purported archaeological cooking installations from three different Bronze and Iron Age sites in Israel in which we deployed a variety of microarchaeological techniques. We provide direct physical evidence, based on Fourier Transform Infrared (FTIR) spectroscopy demonstrating that the archaeological installations were operated with temperatures as high as 900°C. Using this technique we also demonstrate that all the mud-constructed installations studied by us were internally-fueled and therefore should be identified as Tannurs rather than the externally- fueled Tabuns. We studied in detail the quantities of ash-related microscopic remains, including opaline phytoliths, calcitic wood ash pseudomorphs and dung spherulites. We show that phytolith morphotype analysis cannot distinguish between wood-dominated and dung-dominated fuel materials, while a newly developed method that calculates the ratio of ash pseudomorphs to dung spherulites (PSR method) makes such a distinction possible.Moreover, we experimented with the effect of partial dissolution on fuel ash PSR values and utilize the results to explain taphonomy and diagenesis associated with two types of archaeological cooking installations - pebble hearths and baking ovens. In addition, we identified micromorphological criteria that can be used to assess whether ash deposits in or above a cooking installations are in situ and/or disturbed. Taken together, all lines of evidence used in this study indicate that wood was the major fuel material across time and space in the studied archaeological contexts, while dung was a secondary source of fuel. This observation also cross-cuts different culture-historical entities (Philistines, Canaanites, Israelites and Egyptians). In addition, wood was preferred as fuel irrespective of environmental differences among the studied sites. This study is yet another demonstration of the value of integrating microarchaeological techniques and approaches to traditional macroscopic archaeology.

The close association of metal ingots to the smelting operation and hence to the ore deposit makes them good candidates for provenance studies which in turn can be used for reconstructing paths of metal trade. A unique group of ingots from Hazor, Israel and two ingot groups retrieved during underwater explorations off the Carmel coast (Israel) were subjected to microstructure, chemical and lead isotope analysis. Ingots from Timna, Bir Nasib and Deir Alla, previously studied, were also subjected to bulk chemical and lead isotope analysis (LIA). The results enabled us to follow changes in the supply of copper to sites of this part of the Levant between two main copper producers: Cyprus and the Arabah (Timna and Faynan). The analyses showed that two of the ingot assemblages correspond to two different phases of Cypriot copper exportation in the second millennium BCE. The earlier phase, identified here for the first time, dated to the Middle Bronze Age II - Late Bronze Age I, consisted of trade in black copper in the form of relatively small plano-convex ingots, as suggested by the evidence from Hazor. The later phase, dated to the Late Bronze Age II, during which Cypriot copper was traded in the form of large oxhide-shaped ingots, is well-known and is evidenced by oxhide ingots recovered off the Carmel coast. A third assemblage from Neve Yam, off the same coast, consisting of 54 ingots of similar shape and composition, is identified here as the hitherto unknown product of the large-scale operations at Faynan in the Iron Age.

Megiddo (Israel) is a key site for the study of the stratigraphy, chronology, and history of the Bronze and Iron ages in the Levant. The article presents a Bayesian chronological model for seven ceramic typology phases and 10 stratigraphic horizons at this site, covering the Late Bronze and much of the Iron Age. The model is based on 78 samples, which provided 190 determinations- the most thorough set of radiocarbon determinations known so far in a single site in the Levant. This set of data provides a reliable skeleton for the discussion of cultural processes and historical events in the region and beyond, including the periods of the Egyptian Empire in Canaan and the Northern Kingdom of Israel.

The relative chronology of the Aegean Iron Age is robust. It is based on minute stylistic changes in the Submycenaean, Protogeometric and Geometric styles and their sub-phases. Yet, the absolute chronology of the time-span between the final stages of Late Helladic IIIC in the late second millennium BCE and the archaic colonization of Italy and Sicily toward the end of the 8th century BCE lacks archaeological contexts that can be directly related to events carrying absolute dates mentioned in Egyptian/Near Eastern historical sources, or to well-dated Egyptian/Near Eastern rulers. The small number of radiocarbon dates available for this time span is not sufficient to establish an absolute chronological sequence. Here we present a new set of short-lived radiocarbon dates from the sites of Lefkandi, Kalapodi and Corinth in Greece. We focus on the crucial transition from the Submycenaean to the Protogeometric periods. This transition is placed in the late 11th century BCE according to the Conventional Aegean Chronology and in the late 12th century BCE according to the High Aegean Chronology. Our results place it in the second half of the 11th century BCE. Copyright:

The microstructure and chemical composition of eight faience beads from an early Iron Age (12th century BCE) assemblage found in the ancient city port of Ashkelon (Israel) are determined by means of FTIR spectrometry, pXRF, microRaman and SEM-EDS analysis. The results are compared with published data of Egyptian and Near Eastern artifacts. Each sample exhibits a hue which is obtained by adding a specific colorant to the glazing mixture. A new gray chalcopyrite-manganese-based colorant was identified. Cementation glazing was most likely used in the manufacturing process of the specimens analyzed, except for the blue bead, which is an Egyptian blue frit. The results suggest that these objects represent a unique assemblage, quite different from contemporary Egyptian and Near Eastern materials, and provide new information regarding the Iron Age faience evidence in the southern Levant.

Remarkably, the largest archaeological game traps ever recorded in the Near East are found in arid landscapes, both on plains and in hilly terrains. This paper describes the construction methods used on steep slopes in the Negev Highland. Apparently, in some cases a massive rampart (rather than a free-standing wall) was built around the trap's head. The details reflect careful planning and heavy-duty work, including leveling and then using more than 100 t of stone for the rampart construction. New C-14 data date the Sayarim site to the Early Bronze Age (minimum age), and the Pitam site to pre-Late Bronze Age. (C) 2012 Elsevier Ltd and INQUA. All rights reserved.

Although a chrono -cultural sequence , including a Chalcolithic period followed by an Early Bronze Age has long been accepted for the Southern Levant , relatively little was understood of the transition between those two distinct entities. Recent discoveries , particularly in the area of the western piedmont of the Judea- Samaria incline (the Shephela), have yielded substantial evidence of continuity in occupation and thus, the nature of the transition for that region and its relationship to the greater Southern Levant. This paper examines the radiocarbon evidence from the site of Modi' in in the Shephela , which indicates the transition there to have occurred in the first half of the 4th millennium BC. Using Bayesian analyses of the data , it further considers additional radiocarbon dates from other sites in the greater region , while offering a practical guide for evaluating validity of individual data to date archaeological deposits to which they have been ascribed

Ancient cooking installations yield important evidence for cooking technology and human diet. A cooking installation termed the Philistine pebble hearth is associated with the arrival of the Philistines at the beginning of the Iron Age in the southern Levant (ca. early/mid-12th century B.C.). These installations have been studied using traditional methods, focusing on a description of form and style in relation to the pottery of the period. Here we present a study using an experimental approach. We prepared three sets of experimental pebble hearths to study the pebbles' thermal behavior in relation to their volume. The comparison of these results with observations of Iron Age I archaeological hearths reveals different patterns in pebble shattering and soot patterns, indicating that the archaeological hearths were used in a different manner than the experimental ones. The experiments highlight the utility of shattered pebbles as an indicator of the use of fire directly on Philistine hearths, even in the absence of ash and/or charcoal. They also demonstrate that these installations may have been used with open fire or live embers. The results are applicable to the study of hearths worldwide, with implications for appropriate excavation methods and basic identification of ancient pyrotechnologies.

A metallurgically-oriented excavation in Area A at Tell es-Safi/Gath yielded evidence for iron and bronze production dating to the early Iron Age IIA. Two pit-like features, which differed considerably from one another in colour, texture and content, were excavated. Evidence shows that each feature represents a different in situ activity related to iron production, inferred by the presence of hammerscales, slag prills and slag. An upturned crucible was found on top of one of the features. Analysis of the crucible slag showed that it was used for bronze metallurgy. Tuyères, both round and square in cross-section, were found in and around the two features. The presence of the two industries together presents a unique opportunity to explore the relationship between copper and iron working. This is especially important against the background of the scarcity of evidence for iron production in the Levant during the early phases of the Iron Age.

The chronology of the Early Bronze Age (EBA) in the southern Levant and the synchronization between the sites, considering seriation and radiocarbon dates, have shown large inconsistencies and disagreement. We have assembled 420 ¹⁴C dates, most of them previously published and a few provided directly by the excavators. The dates have been re-evaluated on the basis of their archaeological context and using analytical criteria. Bayesian modeling has been applied to the selected dates in relation to the given seriation of the EBA subperiods (EB I, II III, IV). Sites with 2 or more sequential sub-phases were individually modeled in order to define the transitions between the subperiods. The new chronology indicates that the EB I-II transition occurred site-dependently between 3200-2900 BC, with EB II-III around 2900 BC, and EB III- IV ~2500 BC.

The Pre-Pottery Neolithic B (PPNB) site of Yiftahel, Israel, contains abundant plaster floors. We surveyed the states of preservation of the plasters using an infrared spectroscopic assay that characterizes the extent of disorder of the atoms in the calcite crystal lattice. We identified the 3 best-preserved plaster samples that had disorder signatures most similar to modern plaster. We then studied the surface layers, fine-grained matrices, and large aggregates of these samples using micromorphology, Fourier transform infrared (FTIR) microscopy, stable carbon and radiocarbon concentrations. Even though some of the plaster components have a geogenic appearance in micromorphology slides and in FTIR spectra, the ¹⁴C analyses show that all components were exposed to high temperatures and as a result were equilibrated with the ¹⁴C content of the atmosphere ~10,000 yr ago. This implies that the plasters at Yiftahel were produced entirely from heat-altered calcite. We also show that these plasters have undergone significant diagenesis. The plaster component with the most disordered atomic signature, and hence the most similar in this respect to modern plaster, did indeed produce a ¹⁴C date close to the expected age.

The Natufian (15-11.5 kyr BP) sites in the southern Levant are characterized by a lack of macrobotanical remains, including charcoal, and poor preservation of bone collagen. As a result, only about 30 reliable radiocarbon dates are available for building a chronology of the Natufian period. Here, we present new ¹⁴C data from the Natufian site of el-Wad terrace that fall in the range of the Early Natufian period. Using Fourier transform infrared (FTIR) analysis, we investigated the environmental factors that influenced the preservation of material for ¹⁴C dating of the site, and we tested a modified pretreatment method for poorly preserved charcoal samples. The normal pretreatment protocol for ¹⁴C samples (W-ABA) removed more charcoal material than the modified method, which omits the first acid treatment (W-BA). This first acid step seems to enhance the extraction of humic substances during the subsequent base step. We found that the poor preservation of charcoal could be attributed to the presence of calcite, and therefore an alkaline pH of sediments. The most important factor determining bone collagen preservation may have been the hydrological setting, i.e. fluctuating water levels due to oversaturation of the dense sediments after rainfall.

The Middle to Upper Paleolithic transition (MP-UP transition) is considered a major technological and cultural threshold, at the time when modern humans spread " out of Africa" , expanded from the Levant into Europe and possibly into central and northern Asia. The dating of this techno-cultural transition has proved to be extremely difficult because it occurred sometime before 40,000 radiocarbon years before present (¹⁴C years BP), which is close to the end of the effective dating range of radiocarbon. Other dating methods such as Thermoluminescence (TL) or Electron Spin Resonance (ESR) are not sufficiently precise to date the recorded archaeological MP-UP transition in the Levant. Here we report a consistent set of stratified radiocarbon ages on freshly excavated charcoal from Kebara Cave, Mt. Carmel (Israel), that span the late Middle Paleolithic (MP) and Early Upper Paleolithic (EUP) This study applied novel strategies to improve sample preparation techniques and data analysis to obtain high-resolution radiocarbon models. From this study it is proposed that the MP-UP transition for this site can be placed immediately after 45,200 ± 700 ¹⁴C years BP and before 43,600 ± 600 ¹⁴C years BP or from 49/48 to 47/46 radiocarbon calibrated years before present (years Cal BP).

The report announces the important radiocarbon-dated sequence recently obtained at Dzudzuana Cave in the southern Caucasus foothills. The first occupants here were modern humans, in c. 34.5-32.2 ka cal BP, and comparison with dated sequences on the northern slope of the Caucasus suggests that their arrival was rapid and widespread. The rich, well-dated assemblages of lithics, bone tools and a few art objects, coloured fibres, pollen and animal remains deposited at Dzudzuana through 20 millennia provide an invaluable point of reference for numerous other sites previously excavated in western Georgia. Detailed information has been placed in a supplementary excavation report online. The data support the significance of these excavations for a better understanding of modern human dispersals.

Ash is formed when plant calcium oxalate crystals (CaC₂O₄) decompose to form calcite (CaCO₃). We found that ash does retain the original calcium oxalate radiocarbon concentration, but in addition, there is another minor ¹⁴C source. This is shown by the presence of a consistent small shift in the pMC and δ¹³C levels when comparing cellulose and ash from modern and archaeological woods. Possible mechanisms for ¹⁴C exchange during combustion or due to diagenesis are considered in order to define parameters for identifying better-preserved wood ash samples.

Hydraulic plasters or mortars prior to the Roman period are rare. Here, we report the identification and characterization of 3000 year old (Iron Age) hydraulic plaster surfaces from the site of Tell es-Safi/Gath. This site, located in central Israel, was occupied almost continuously from prehistoric through modern times, and is identified as the Canaanite and Philistine city of Gath. A survey using an on-site Fourier transform infrared spectrometer (FTIR) identified the presence of amorphous silicates, in addition to calcite, in each of two superimposed plaster layers. This suite of minerals is characteristic of hydraulic plaster. An in-depth characterization of the plasters using FTIR, acid dissolution, X-ray fluorescence (XRF), X-ray powder diffractometry (pXRD), heating experiments and scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (SEM-EDS), shows that special silicate-containing minerals were brought from some distance to the site in order to produce these plaster surfaces. We therefore conclude that the plasters were deliberately produced, and were not the result of a fortuitous addition of local silicate minerals. A layer of around 150μm thick enriched in carbonate hydroxylapatite was found in both plaster surfaces, and the same mineral was identified by infrared spectrometry in the surrounding sediments. This suggests that organic materials were used on these surfaces. These surfaces are among the oldest hydraulic plasters known.

This work presents an attempt to date brines and determine flow rates of hypersaline groundwater in the extremely dynamic system of the Dead Sea (DS), whose level has dropped in the last 30 yr by ~20 m. The processes that affect the carbon species and isotopes of the groundwater in the DS area were quantified in order to estimate their flow rate based on radiocarbon and tritium methods. In contrast to the conservative behavior of most ions in the groundwater, the carbon system parameters indicate additional processes. The dissolved inorganic carbon (DIC) content of most saline groundwater is close to that of the DS, but its stable isotopic composition (δ¹³C_DIC) is much lower. The chemical composition and carbon isotope mass balance suggest that the low δ¹³C_DIC of the saline groundwater is a result of anaerobic organic matter oxidation by bacterial sulfate reduction (BSR) and methane oxidation. The radiocarbon content (¹⁴C_DIC) of the saline groundwater ranged from 86 pMC (greater than the ~82 pMC value of the DS in the 2000s) to as low as 14 pMC. The similarity between the ¹⁴C_DIC value and Na/Cl ratio of the groundwater at the DS shore and that of the 1980s DS brine indicates that the DS penetrated to the aquifer at that time. The low ¹⁴C_DIC values in some of the saline groundwater suggest the existence of ancient brine in the subaquifer.

A rapid phytolith extraction procedure is described, that allows phytolith concentrations and morphotype assemblages to be analyzed within hours. This procedure enables the results of these analyses to be used during an archaeological excavation, in order to better understand how plants were used. The new procedure was tested using a standard phytolith extract and two experimental phytolith-sediment blends and found to be both accurate and precise. The reliability of partial slide counting was evaluated and found to be as accurate and precise as existing phytolith quantification methods. The new extraction and counting procedures were applied to an archaeological site, Tell es-Safi/Gath, Israel. The results demonstrate how information on phytolith concentrations in sediments that are available from one day to the next, can be used during an excavation to more effectively document the local features of interest and obtain better information.

Local sea level curves are obtained by using various methods, from land as well as from sea records and are based on different indicators. The most updated Holocene sea level curve for the coast of Israel, Eastern Mediterranean, from about 9500 cal years ago up to about 700 hundred years ago (the end of the Crusaders period) is based mainly on coastal archaeological remains. For the last Millennia an attempt was made to use bio-constructions along the present-day abrasion platforms as a tool for reconstructing past sea levels. Here we present radiocarbon dating of pre-bomb mollusks from the intertidal zone in order to determine the reservoir age of the bio-construction.

Yuchanyan Cave in Daoxian County, Hunan Province (People's Republic of China), yielded fragmentary remains of 2 or more ceramic vessels, in addition to large amounts of ash, a rich animal bone assemblage, cobble and flake artifacts, bone tools, and shell tools. The artifacts indicate that the cave was a Late Paleolithic foragers' camp. Here we report on the radiocarbon ages of the sediments based on analyses of charcoal and bone collagen. The best-preserved charcoal and bone samples were identified by prescreening in the field and laboratory. The dates range from around 21,000 to 13,800 cal BP. We show that the age of the ancient pottery ranges between 18,300 and 15,430 cal BP. Charcoal and bone collagen samples located above and below one of the fragments produced dates of around 18,000. These ceramic potsherds therefore provide some of the earliest evidence for pottery making in China.

Radiocarbon dating has had an enormous impact on archaeology. Most of the dates are obtained using charred materials and, to a lesser extent, collagen from bones. The contexts in which charred materials and bones are found are often, however, not secure. There are 3 other datable materials that are usually in secure contexts: plaster/mortar, phytoliths, and the organic material in the ceramic of whole vessels. The plaster/mortar of walls and floors are often in very secure contexts. Phytoliths are abundant in archaeological sites and in some situations form well-defined surfaces. Whole vessels are usually found in secure contexts and their typologies are indicative of a specific period. Dating each of these materials has proved to be difficult, and solving these technical problems represents major future challenges for the ¹⁴C community. The effective use of charcoal and bone collagen for dating can also be improved by paying careful attention to the micro-contexts in which they are found, such as in clusters or as part of well-defined features. Pre-screening to identify the best preserved material can also contribute to improving the accuracy of the dates obtained. A general objective should be to have an assessment of the quality of the material to be dated so that the potentially invaluable information from outliers can be exploited.

Infrared spectroscopy provides information not only on the type of calcium carbonate polymorph, but also on the extent of atomic order. In calcite, three major infrared absorption peaks are identified: ν₃, ν₂, and ν₄. It was shown that the ratio between ν₂ and ν₄ bands reflects the order of the calcite crystal structure. In this paper we analyse this ratio in geologically formed calcites, archaeological plasters, modern plasters and experimentally prepared plasters. For the geological calcite, the values of the ν₂/ν₄ ratio are around 3, whereas for the experimentally prepared plasters, the values are around 6.5. The ν₂/ν₄ ratio for archaeological plasters varies from 3 to 6. This shows that a high ratio is indicative of disorder in the crystal, and implies that the calcite was formed from calcium oxide at high temperatures. It also implies that this disorder can be preserved for at least 14,000 years. The ν₂/ν₄ ratio of calcite from archaeological sites can thus be used to differentiate between anthropogenic calcite, such as in plaster, mortar and wood ash, from geogenic calcite, such as in limestone. The ratio may also be used to identify plaster or ash that still retains its original crystals and therefore carbon-14 content.

The presence of many phytolith-rich layers in late Bronze and Iron Age deposits at Tel Dor, Israel, are indicative of specific locations where plants were concentrated. Detailed studies of six of these phytolith-rich layers and associated sediments from Tel Dor show that the phytoliths were derived mainly from wild and domestic grasses. The most common domestic grass was the cereal Triticum aestivum (bread wheat). Three of these layers have a microlaminated microstructure, associated dung spherulites and phosphate nodules; characteristics that all point to the phytolith-rich layers having formed from dung in animal enclosures. In two of the layers, the microlaminated structure is absent while dung spherulites and phosphate nodules are present, suggesting that these too originate from dung that was not deposited in an enclosure. The sixth layer is microlaminated but does not contain spherulites. We thus cannot suggest a parsimonious explanation of its observed properties. Concentrations of burnt phytoliths are present in three locations, implying that dung was either burnt in situ or the ashes from burnt dung were redeposited. The transformation of dung accumulations into phytolith-rich layers involves a loss of organic material and hence a significant reduction in sediment volume, which is clearly apparent in the stratigraphy of some of the locations examined. The volume reduction can be observed in the macrostratigraphy and has important implications with regard to macrostratigraphic interpretation. The presence of abundant phytolith-rich layers on the tell has significant implications for the concept of 'urbanism' during these periods.

Vacuum distillation is shown to be useful for the quantitative extraction of dissolved inorganic carbon (as CO₂) and water from sediments of the unsaturated zone in the Coastal Aquifer of Israel. Several tests of vacuum extractions from tap water and sediments are presented, including standard addition, which show that the distillation procedure is quantitative, with minimal or no carbon isotope fractionation. The optimal temperature of the sediment during the extraction was also defined. Examples of vacuum extractions of sediments are shown.

The early Holocene sedimentary succession exposed at the 3.77 m-high marine terrace on the south coast of Potter Cove (King George Island/ Isla 25 de Mayo, South Shetland Islands, Antarctica) contains marine invertebrates, seaweed and bones of seals and penguins. Radiocarbon dating on penguin bones from this succession yielded 7,562 cal yr BP and 7,414 cal yr BF. These dates suggest that the bones are among the oldest remains of Holocene vertebrates found in South Shetland Islands, and may be considered as minimum ages of penguin occupation of coastal areas on the islands during the early Holocene. This indicates interglacial conditions in this time, with climate/sea ice situation similar to the present and seasonally open marine conditions.

As the analytical precision of radiocarbon dating has improved to ±30 years, it is now possible to address chronological questions in the sub-century range. The uncertainty, however, depends upon other factors in addition to the analytical uncertainty. First and foremost it depends on the archeological macro- and micro-contexts: radiocarbon dating therefore starts in the field. The accuracy and precision of a radiocarbon date also depend on the type of material and on being able to characterize the material quality of the sample before and after the chemical pre-treatment. Only by addressing all these aspects can radiocarbon dating become a powerful tool in archaeological research.

The geographical evolution of Haifa Bay and Zevulun Plain, Israel, from the late Pleistocene to the Holocene, is based on detailed analysis of drilled cores. At the beginning of the Holocene the Bay area was still under terrestrial conditions. Only about 9500 to 9000 cal. yr BP, when sea level rose to about 35-30 m below present sea level (b.s.l.), did Nile-derived sand start to bypass the Carmel headland and Haifa Bay come into existence as a morphological feature. Between 8000 and 7150 cal. yr BP, when sea level was 14-10 m b.s.l., the invading sea crossed the present-day coastline. At about 6800 to 6600 cal. yr BP sea level rose to about 5 m b.s.l. and flooded the Zevulun Plain up to 2 km inland, and the River Qishon estuary up to 4 km inland. It is still unknown exactly when the sea reached its maximum penetration inland but later, about 4000 years ago, the coastline in the research area was still east of the present-day coast, up to 3 km in the Zevulun Plain and 4.8 km in the River Qishon estuary. When the coastline started to retreat westward, the reclamation was followed by intensive deposition of shallow marine sand and aeolian dunes, while to the east, different wetland conditions developed. The archaeological data indicate that during the Early Bronze Age I and Early Bronze Age II, dated to between 5600 and 4700 cal. yr BP, and even later, during the Middle Bronze Age II period, about 4600 to 3500 cal. yr BP, the coastline was still east of the present-day coast, but it never actually reached the bases of most of the tells, as has been suggested, except for Tel Akko and Tel Abu Hawam.

The structures and compositions of modern and fossil charcoal samples were compared in order to evaluate charcoal degradation processes in archaeological sites. Modern charcoal samples produced in campfires contain two major phases: graphite-like microcrystallites and a non-organized phase. These phases create a mosaic-like structure with differing relative proportions depending on the taxonomic source of the wood used. Fossil charcoal samples (Tel Dor, Israel: 3000 years BP and Kebara Cave, Israel: 40,000 years BP) also contained the graphite-like microcrystallites and the non-organized phases, but were clearly altered compared to modern charcoal. The graphite-like phase of the fossil charcoal has much higher electrical resistivity, and its ESR properties show that it has markedly altered surface electronic states. Infrared spectra show the presence of additional carboxylate groups. Oxidation has therefore altered the structure. This appears to be a "self-humification" process that affects the graphitic component, and probably the non-organized phase as well.

The olive tree (Olea europaea) was domesticated by vegetative propagation of selected wild individuals with superior fruit. Later, new cultivars were established repeatedly from feral trees or from crosses between wild, feral, and domesticated trees. Thus the genetic background of many contemporary domesticated lines is a mixture of ancient cultivars and local wild trees. Ancient DNA may illuminate the complicated process of olive domestication because such DNA sequences provide data about ancient genomes that existed closer to the domestication events. Well preserved DNA must be available for such studies, even though in the Mediterranean region, where olive cultivation took place, the climatic conditions are not favorable for DNA preservation. To select for well preserved pits we measured their proportions of lignin by IR spectroscopy, and correlated this with parameters of DNA quality such as template length in an olive-specific repeat array, and template quantity as determined by real-time PCR amplification. Archaeological pits that passed these tests did contain high quality ancient DNA. We present the first ancient olive DNA sequences and compare them to modern wild, feral and domesticated lines.

The in situ produced cosmogenic beryllium isotope, ¹⁰Be, in flint artifacts from different layers in prehistoric caves can provide information on flint procurement. The buildup of ¹⁰Be in a flint matrix is related to the exposure time of the flint to cosmic rays. Although this exposure history can be complex, the ¹⁰Be content of flint assemblages can show whether the raw material was obtained from shallow mining and/or surface collection as opposed to sediments two or more meters below the surface. Flint artifact assemblages from two Palaeolithic caves in Israel, Tabun and Qesem, were analyzed. In Tabun cave the flint artifacts from Lower Layer E (Acheulo-Yabrudian, around 400 000-200 000 yr) contain very small amounts of ¹⁰Be, which is consistent with flint procured from sediments two or more meters deep. Artifacts from above and below Tabun Lower Layer E show a more complex distribution, as do artifacts from all layers of Qesem cave (Acheulo-Yabrudian). This is probably due to the fact that they were surface collected and/or mined from shallow (less than 2 m) depths. We show here that artifact assemblages have different concentrations of ¹⁰Be, indicating different raw material procurement strategies.

Nearly a decade ago, a different chronology than the conventional absolute chronology for the early Iron Age in Israel was suggested. The new, lower chronology "transfers" Iron Age I and Iron Age IIA contexts in Israel, traditionally dated to the 11th and 10th centuries BCE, to the 10th and 9th centuries, respectively. Thus, it places the Iron I|IIA transition at about 920-900 BCE. This alternative chronology carries important implications for Israelite history, historiography, and Bible research, as well as for the chronologies of other regions around the Mediterranean. Relevant radiocarbon data sets published to date, which were measured at different sites by different laboratories, were claimed to be incompatible. Therefore, the question of agreement between laboratories and dating methods needs to be addressed at the outset of any study attempting to resolve such a tight chronological dilemma. This paper addresses results pertaining to this issue as part of a comprehensive attempt to date the early Iron Age in Israel based on many sites, employing different measuring techniques in 2 laboratories. The intercomparison results demonstrate that: a) the agreement between the 2 laboratories is well within the standard in the ¹⁴C community and that no bias can be detected in either laboratory; and b) calculating the Iron I|IIa transition in 3 different ways (twice independently by the measurements obtained at the 2 labs and then by combining the dates of both) indicates that the lower chronology is the preferable one.

The development of mining to acquire the best raw materials for producing stone tools represents a breakthrough in human technological and intellectual development. We present a new approach to studying the history of flint mining, using in situ-produced cosmogenic Be-10 concentrations. We show that the raw material used to manufacture flint artifacts approximate to300,000 years old from Qesem Cave (Israel) was most likely surf ace-collected or obtained from shallow quarries, whereas artifacts of the same period from Tabun Cave (Israel) were made of flint originating from layers 2 or more meters deep, possibly mined or quarried by humans.

In this study, we aim to characterize the main processes controlling ¹⁴C_DIC concentrations in porewater at the shallow shelf (water depth less than 120 m) off the Mediterranean coast of Israel. At these water depths, we expected to find evidence for seawater penetration toward the coast, since this area was flooded by seawater only some 18,000 yr ago (the end of the Last Glacial period). Measurements of the chemical composition ( ¹⁴C_DIC) and stable carbon isotopic composition (δ¹³C_DIC) were performed in several sediment cores (40-250 cm long) at water depths between 6 and 115 m. At water depths of 60 m, represented by a 2.5-m-long sediment core, the porewater ¹⁴C _DIC levels (85-87 pMC) were lower than the corresponding sediment values in each layer (92-95 pMC), mainly due to the oxidation of relatively old organic matter (about 70 pMC) with no evidence to advection. In contrast, sediment cores from water depths shallower than 50 m showed only slight anaerobic oxidation and high ¹⁴C_DIC values of approximately 100 pMC, indicating possible downward advection. These geochemical observations support the perception that the penetration of seawater into the coastal aquifer occurs at the shallow water zone (

Core profiles in the deep SE Mediterranean Sea revealed a significant ?14C excess in the total dissolved inorganic carbon (DIC) of porewater as compared to the ?14C of the sediments, below the bioturbation zone down to core bottom (>2 m). The main observation was that the age difference between porewater and sediments, as calculated from the excess, was not constant but rather increasing with depth. The porewater apparent age was younger by 10% than the age of the sediment at the core top and gradually became younger by about 70% at the bottom of the core. Flux calculations and mass balances of the chemical and isotopic data suggest that this 14C excess stems from a downward diffusive flux of 95 ± 15 atoms of 14CDIC m?2 s?1 from the bioturbation zone and overlying bottom water into the sediment. The 14CDIC flux is opposite in direction to the DIC flux out of the sediment. It is suggested here that the 14CDIC flux may severely interfere with age determination of small submarine ?brine lakes? formed in the deep Mediterranean. In addition, the 14C excess should show up in authigenic carbonate phases precipitating within the sediment and, hence, may serve as a tool to identify the extent and duration of authigenic carbonate precipitation.

The nuclide 44Ti(T1/2=59.2 yr) has recently become an important asset to nuclear astrophysics through the measurement of its cosmic radioactivity, yielding significant information on fresh 44Ti nucleosynthesis in supernovae. We propose to use AMS to determine the production rate of 44Ti by the main channel believed to be responsible for 44Ti astrophysical production, namely 40Ca(α,γ). A preliminary experiment conducted at the Koffler 14UD Pelletron accelerator demonstrates a sensitivity of 1×10−14 for the 44Ti/Ti ratio. The AMS detection was performed using 44Ti− ions sputtered from a TiO2 sample, reducing considerably the 44Ca isobaric interference. The present limit corresponds effectively to 44Ti production with resonance strength in the range 10100 meV for a one-day 40Ca(α,γ) activation. Several such resonances are known to be responsible for 44Ti production in the astrophysical temperature range and should be amenable to experiment with the proposed method.

A method of study of weakly-formed negative ions by excitation in laser light and accelerator mass spectrometry is described. Measurement of the photoelectric detachment cross section of the extra electron as a function of the photon energy gives information on the electron affinity. Absolute cross sections for photodetachment of negative ions of La, Ce, Th and U have been measured at the fundamental wavelength (1064 nm) of a Nd: YAG laser. To demonstrate the feasibility of determination of the electron affinity by this method, measurements near the threshold of photodetachment in Te with known electron affinity (1.971 eV) were performed.

Eleven rainwater samples from Israel have been analyzed for their isotopic36Cl/Cl ratios and their soluble salt content. The rains display a range of36Cl/Cl ratios between1.8 × 10−15 and50 × 10−15, and chloride ion concentrations of between 0.3 and 4.2 meqCl/−l. The ratios between the concentrations of Na+, Mg2+ and Cl− in the samples demonstrate a clear marine origin for these ions in the rainwater. Although the stable35Cl isotope in rainwater is marine in origin, while the accompanying36Cl radioisotope is non-marine, both are linearly and positively correlated in chloride-rich (1meqCl/l) rains. The36ClCl seawater solute relationship may be explained as result of a mixing process between two chloride-bearing sources: (a) sea-spray laden air with a low36Cl/Cl ratio, and (b) a Cl-rich mineral dust reservoir, with a high36Cl/Cl ratio. Both are introduced and admixed into the atmosphere during storms. The possibility of a high36Cl/Cl ratio stratospheric end-member is rejected in view of the non-marine nature of the chlorine therein.

Negative ions can be neutralized by detaching their additional electron through interaction with a laser beam. By properly choosing the laser wavelength, the process is highly selective; it can in principle enhance the discrimination power of an accelerator mass spectrometry system for ions of different elements (e.g. isobaric background) by allowing their separation prior to their injection into a tandem accelerator. We demonstrate this process in the case of the ⁵⁹Ni- ⁵⁹Co pair with the AMS system based on the Rehovot 14UD Pelletron accelerator and a pulsed Nd-YAG laser at the fundamental wavelength (1064 nm). A photodetachment cross section of (0.6 ± 0.3) × 10^-17 cm² was measured for ⁵⁹Co^- and a suppression factor of 125 for the ⁵⁹Co isobaric background was achieved in a ⁵⁹Ni AMS measurement. The duty factor due to the pulsed laser was about ^10-4. The laser-AMS system was also applied to the study of rare negative ions in the actinide region. Preliminary results on the laser interaction with uranium negative ions are reported.

A method is described whereby the chloride concentration and the ratio of 36Cl to total chloride of a given water body are compared with those of precipitation to determine the fraction of the original precipitation which was lost by evapotranspiration before it reached that water body. This method was applied to 11 water sources in the upper Jordan River basin, and the evapotranspirative loss was generally found to be in the range 4090%. This method, which is much simpler than the other methods for determining regional evapotranspiration, will enable us to monitor the changes in the hydrological cycle which are expected to result from the greenhouse effect.