Hayonim Cave: a TL-based chronology for this Levantine Mousterian sequence

The thermoluminescence dating method was applied to 77 heated flints from the Mousterian layers of Hayonim Cave in order to provide a precise TL-based chronology for this important Levantine sequence. A detailed dosimetric study was performed by using 76 dosimeter capsules and revealed strong spatial dose-rate variations. In parallel, Fourier transform infrared spectrometry enabled the identification of various mineral assemblages in the sediments of the cave and to localize the boundaries of these assemblages. By comparing these two data sets, it is shown that low dose-rate values (∼500 μGy/a) are systematically recorded in areas where the calcite-dahllite (CD) assemblage is preserved, whereas higher values (up to 1300 μGy/a) are associated with the leucophosphite, montgomeryite, variscite and siliceous aggregates (LMVS) assemblage. The dosimetric and mineralogical information was combined in order to assess, where possible, the dose-rate experienced by each flint during its burial. Some of the flint samples analyzed were too close to mineral assemblage boundaries and were therefore discarded. This rigorous selection led to TL ages ranging from 230 to 140 ka for the lower part of the Mousterian sequence (layers F and Lower E), which contains lithic industries characterized by blade production using the laminar method.     

Examining histology to identify burned bone

Early research suggests that examination of the microscopic internal structure is a valid method for distinguishing burned from unburned bone in the archaeological record. This study compares burned and unburned modern bones with archaeological bones from Sibudu Cave (ca. 60,000 years ago) and Cave of Hearths (over 200,000 years ago) to more fully describe the heat-induced histological changes to bone. We also explore the effects of diagenesis on those changes to determine if histological evidence of burning preserves through fossilisation and diagenetic processes and can be successfully used to identify ancient burning. Application of this technique can help in addressing various issues, including the origins of controlled use of fire and understanding animal butchery and disposal.     

Coordinated Strategic Voting in the 2008 Federal Election

Citizenship and Immigration Canada's new citizenship guide, Discover Canada, received significant coverage in the national media and among popular bloggers when it was released in late 2009. Among the more controversial responses were allegations that the guide served a partisan political purpose. It was “an incremental step in the rebranding of Canada into a conservative country, full of people more inclined to vote Conservative.” This paper investigates the veracity of this claim by documenting the historical evolution of Canada's citizenship guides. It finds that while Discover Canada departs notably from its immediate, Liberal-sponsored, predecessors, it is not so different from the initial documentation produced under the Liberal governments of Pierre Elliott Trudeau. To suggest that the new guide has fundamentally altered the national image is therefore a profound exaggeration.     

Presence of xiphodont crocodilians in the Tertiary and Pleistocene of Australia

The presence of two types of xiphodont crocodiles is reported for the first time from Australia. Crocodiles with this xiphoid type of tooth morphology were previously unknown anywhere in the world since the Miocene except for isolated xiphoid teeth noted by Plane (1967) from a Pliocene deposit in New Guinea.     

Geochemical discrimination of basaltic sources as a tool for provenance analyses of bifacial tools in the southern Levant: first results from the Jezreel Valley,Israel

The determination of groundstone tool sources bears the potential to examine aspects like raw material selection and preference, mobility, trade and exchange patterns, control over resources and long term use of raw material sources. The discovery of the Neolithic/Chalcolithic basanite bifacial quarry of Giv'at Kipod in the Jezreel Valley, Israel, provides the opportunity of raw material centred provenance studies of bifacials in the southern Levant. The basis for reliable provenance analyses is a clear geochemical characterization of the extraction site and its discrimination from other potential sources. To achieve this, the Miocene magmatic rocks of the Jezreel Valley were sampled and analysed by XRF and La-ICP-MS. The geochemical evaluation, combined with cluster analyses, resulted in a clear discrimination of the Giv'at Kipod lava from other basaltic sources in the area. Based on the geochemical field data, a Giv'at Kipod provenance for six bifacial tools found in three archaeological sites dated to the Neolithic and the Chalcolithic periods was established. The results suggest that the quarry was in use for several millennia. This pilot study demonstrates that for provenance analyses lava outcrops in the southern Levant can be geochemically discriminated from each other on a very small spatial scale, on the basis of a detailed field sampling and the application of multivariate methods.     

Application of 3-dimensional microscopy and micro-CT scanning to the analysis of Magdalenian portable art on bone and antler

The appearance of portable artistic objects during the Upper Palaeolithic is characterised by a combination of a wide choice of techniques, use of different materials and a diversity of iconographic expression, with many objects made of bone and antler decorated with animal representations. Taphonomic and experimental approaches have been systematically applied in an effort to understand the technical and artistic procedures followed. In this study, we applied a new combination of 3-dimensional microscopy (focus variation optical microscope) and micro-CT scanning to the analysis of two Magdalenian engraved specimens: a reindeer antler from the site of Neschers (France), engraved with the partial image of a horse in left profile, and a horse metatarsal from Courbet Cave, Penne (France), engraved with a horse head also in left profile. Results of the analysis suggest that both the Neschers and Courbet Cave engravings had been prepared before being carved. The overall contours of the horse body/head were incised first, while anatomical features were added afterwards. In the Neschers case, the incision resulted from the repeated scratching of a previously made incision in order to enlarge the engraving, possibly reflecting the engraver's aesthetic sense. The combination of the techniques used in this study is applicable to fragile or unique archaeological specimens. Micro-CT scanning, in particular, provides non-invasive means for identifying engravings that are obscured by encrusted sediment. The application of these techniques can potentially open new avenues for the authentication, technical and gestural recognition and interpretation of incised forms and artistic creativity.     

To catch a chameleon,or actualism vs. natural history in the taphonomy of the microvertebrate fraction at Qesem Cave,Israel

Qesem Cave is a unique Middle Pleistocene, hominin-bearing site in Israel that contains a rich microvertebrate accumulation. The microvertebrates are highly unusual in that half of them are from small reptiles, and most of the reptiles are chameleons, which are otherwise rare in the fossil record. Analysis of the lower vertebrate component shows uniform taphonomic characteristics: on average 17.6% of specimens show evidence of corrosion (the vast majority light), and specimen breakage is between 4.9 and 12.0%, depending on metric. Charring is negligible. Most species are small (body mass <60 g). These taphonomic attributes do not vary in the studied portion of the stratigraphic profile, nor do they systematically vary between taxa. Thorough study of all skeletal parts suggests that most individuals probably entered the cave as whole animals; the only exception is the large glass lizard, Pseudopus, which is represented mostly by the tail. These taphonomic data suggest a Barn Owl as the predominant accumulator. However, natural history observations on Barn Owls and chameleons are strongly at odds with this actualistic inference: Barn Owls are nowhere recorded as a major predator on chameleons. We argue that a focus on extant, especially European, populations could distort our understanding of their feeding biology and is vulnerable to counterexample. We propose a scenario that harmonizes actualism and natural history. We further identify a possible owl roost in Qesem Cave, the first time such a roost has been identified in a collapsed cave setting. These conclusions may have conservation implications for chameleons. They also suggest that the hearth adjacent to the microvertebrate concentration was situated in the twilight zone.     

里耶秦简所见的阳陵与迁陵

本文将里耶秦简牍中有关阳陵、迁陵的文书记载与传世文献、考古发现相结合,考订这两个秦县的沿革与地望,并着重分析阳陵县的起源、地望和迁陵县的乡里结构等问题,指出:目前关于里耶简中阳陵地望的两种说法,均不能与传世文献完全吻合,我们认为此县既不属洞庭郡管辖,也不应在关中地区;由此提出另一假设:里耶秦简中阳陵县的前身即见于包山楚简之“阳陵”,为郑国故地,后属于楚,当在今河南许昌市西北。迁陵即今里耶古城,但非洞庭郡治所;迁陵县下辖乡,乡下辖里,与包山楚简所见县辖里的结构有所不同。     

云冈20窟佛坐像对太和期单尊佛像的影响

云冈20窟佛像的图样来源属于犍陀罗-凉州系统佛像,其坐像的衣纹形式在昙曜五窟中别具一格。至云冈第2期即太和时期,以20窟佛坐像为范本的石窟佛像和单尊铜石佛像盛行一时,确立了太和时期独具特色的佛像形式。     

金沙玉器制作工艺的初步观察

2001年发现的成都金沙遗址现已出土了2000余件玉器,数目可观,种类繁多。大量的玉器造型规整,制作精细。最为重要的是许多器物上都留下了与制作工艺有关的痕迹,其中更有一些半成品和玉料,这就为我们研究古玉制作工艺提供了极其重要而又丰富的实物材料。