CRC806-Database Data Feed (RSS) Data feed of the CRC806-Database A new Dead Sea pollen record reveals the last glacial paleoenvironment of the southern Levant The southern Levant is a key region for studying vegetation developments in relation to climate dynamics and hominin migration processes in the past due to the sensitivity of the vegetation to climate variations and the long history of different anthropogenic occupation phases. However, paleoenvironmental conditions in the southern Levant during the Late Pleistocene were still insufficiently understood. Therefore, we investigated the vegetation and fire history of the Dead Sea region during the last glacial period. We present a new palynological study conducted on sediments of Lake Lisan, the last glacial precursor of the Dead Sea. The sediments were recovered from the center of the modern Dead Sea within an ICDP campaign. The palynological results suggest that Irano-Turanian steppe and Saharo-Arabian desert vegetation prevailed in the Dead Sea region during the investigated period (ca. 88,000–14,000 years BP). Nevertheless, Mediterranean woodland elements significantly contributed to the vegetation composition, suggesting moderate amounts of available water for plants. The early last glacial was characterized by dynamic climate conditions with pronounced dry phases and high but unstable fire activity. Anatomically modern humans entered the southern Levant during a climatically stable phase (late MIS 4–MIS 3) with diverse habitats, constant moisture availability, and low fire activity. MIS 2 was the coldest phase of the investigated timeframe, causing changes in woodland composition and a widespread occurrence of steppe. We used a biome modeling approach to assess regional vegetation patterns under changing climate conditions and to evaluate different climate scenarios for the last glacial Levant. The study provides new insights into the environmental responses of the Dead Sea region to climate variations through time. It contributes towards our understanding of the paleoenvironmental conditions in the southern Levant, which functioned as an important corridor for human migration processes. 2019-05-16T11:23:59+02:00 CURRENT SAMPLE PREPARATION AND ANALYTICAL CAPABILITIES OF THE RADIOCARBON LABORATORY AT COLOGNEAMS This work summarizes the methodical capabilities, improvements, and new developments in the radiocarbon laboratory of the accelerator mass spectrometry (AMS) facility at the University of Cologne, Germany, which was established in 2010. During the past years, the laboratory has specialized in the analysis of small and gaseous samples. We thus, recently installed a second ion source dedicated for radiocarbon (14C) analysis of CO2 samples at our 6 MV Tandetron AMS from High Voltage Engineering Europe B.V. that is coupled with the gas injection system from Ionplus and an EuroVector EA 3000 elemental analyzer. This work summarizes all pretreatment methods and analytical facilities established in our laboratory during the last years including 14C analysis of individual organic compounds and of CO2 trapped on molecular sieves. We also report different blank values including our long-term blank since 2011, which is for normal-sized, solid samples (650–1000 µg C) 0.0012 ± 0.0004 F14C (54,305 ± 2581 yr BP, n = 484). The precision obtained for modern samples measured as graphite is 0.5% and for gaseous samples injected with the GIS ≤2%. 2019-05-14T09:12:27+02:00 Population dynamics and socio-spatial organization of the Aurignacian: Scalable quantitative demographic data for western and central Europe Demographic estimates are presented for the Aurignacian techno-complex (~42,000 to 33,000 y calBP) and discussed in the context of socio-spatial organization of hunter-gatherer populations. Results of the analytical approach applied estimate a mean of 1,500 persons (upper limit: 3,300; lower limit: 800) for western and central Europe. The temporal and spatial analysis indicates an increase of the population during the Aurignacian as well as marked regional differences in population size and density. Demographic increase and patterns of socio-spatial organization continue during the subsequent early Gravettian period. We introduce the concept of Core Areas and Extended Areas as informed analytical spatial scales, which are evaluated against additional chronological and archaeological data. Lithic raw material transport and personal ornaments serve as correlates for human mobility and connectedness in the interpretative framework of this study. Observed regional differences are set in relation with the new demographic data. Our large-scale approach on Aurignacian population dynamics in Europe suggests that past socio-spatial organization followed socially inherent rules to establish and maintain a functioning social network of extremely low population densities. The data suggest that the network was fully established across Europe during the early phase of the Gravettian, when demographic as well as cultural developments peaked. 2019-05-08T11:42:26+02:00 CRC806-E1 Raw-material-polygons. Database on the Late Palaeolithic of Europe V2019-05-08 The dataset provides area-size data on raw-material-polygons - currently for internal use only. 2019-05-08T08:32:05+02:00 WHEN SIZE MATTERS: different roles for blades and bladelets in the Early Ahmarian site of Al-Ansab1 (Jordan) Bladelets are suggested as the hallmark of Early Upper Palaeolithic (EUP) industries. Bladelet-making is central in defining EUP technocomplexes and the debate is still ongoing. Here, new data on a significant sample of the stratified Early Ahmarian site of Al-Ansab 1 (Jordan) are presented. It is shown that bladelets constitute the majority of the blanks and the goal of the lithic production at the site. They are obtained through unipolar knapping of single platform cores, constraining a central area by means of embedded maintenance blade blanks and flank flakes. Bladelets are defined as the laminar blanks less than 12 mm wide. They are overwhelmingly represented in target products, i.e. straighter and more regular, while blades perform maintenance roles. Bladelet negatives are represented on laminar blanks and cores of all sizes. The presented analysis is part of a PhD project focusing on a comparison between bladelet-makings in different EUP sites along the putative “Eastern Trajectory”. 2019-05-07T15:26:19+02:00