نتایج جستجو برای: lithic
تعداد نتایج: 1046 فیلتر نتایج به سال:
the organization of stone tool production is one of the most important aspects of lithic assemblage studies. reduction process indicates how lithic material was prepared and transported through reductive phases which can be reconstructed according to remaining material from each phase. such studies are important in explaining the differences between lithic assemblages from the same period and i...
961 subsamples (small symbols) and average compositions (larger symbols). Unpublished data, this lab. Figure 2: Percentage of clasts in each of the main lithic clast groups. Total number of lithic clasts, 350. The Dhofar 961 Meteorite Group: A View into the Interior of South Pole Aitken Basin? R. A. Zeigler, R. L. Korotev, and B. L. Jolliff. Dept. of Earth and Planetary Sciences, MacDonnell Cen...
One assumption that persists in the field of archaeology is that it is easier to observe children within historic sites through toys or burials than it is to observe children within a prehistoric setting through lithic production. The purpose of this paper is to examine the current position of children within the prehistoric archaeological literature and to provide case studies of research that...
Introduction: Dhofar 1428 is a lunar feldspathic breccia found in 2006. Bunch et al. [1] briefly described mineral chemistry of Dhofar 1428. Korotev and Zeigler [2] analyzed its bulk FeO and Sm compositions. Here, we report such detailed data for Dhofar 1428. Results and Discussion: Dhofar 1428 has a distinct breccia texture with numerous fragments of rock, mineral, and glass all welded by a gl...
Antarctic endolithic microecosystems harbour distinct biofilms. The lithic substrate and the microorganisms comprising these films are intimately linked, leading to complex mineral-microbe interactions. Hence, the microhabitats and microenvironments of these microecosystems are not only determined by the physicochemical features of the lithic substrate, but are also conditioned by the biologica...
A number of Paleo-Indian artifacts found in Western Wisconsin lithic assemblages were observed to be made of an unidentified olive green colored chert. A macroscopic examination of these artifacts, and comparison with known possible sources suggested that the material might be Silurian Chert Type II from the Door Pennisula in eastern Wisconsin. Attributed analysis and comparison with lithic deb...
Heat-treatment in lithic technology refers to the controlled heating of quartz-rich, brittle, elastic lithic materials in order to reduce fracture toughness and improve knapping qualities. Successful heat-treatment reduces the point-tensile strength of many varieties of micro-crystalline quartz, including chert, without perceptibly altering any of the other properties with regard to fracture. T...
The discovery of 24 stone artifacts and two bone tools at the German fluvial site of Untermassfeld associated with a rich vertebrate fauna of the Epivillafranchian provide further evidence of a Lower Pleistocene arrival of early Homo in northern Europe, since results of geological, paleomagnetic and biostratigraphic investigations point to an absolute age of approximately 1.07 million years (ma...
We propose a method for computer analysis of 3D-scanned lithic artifacts. It provides a detailed description of the scars and ridges that were left on the surface of the stone tool while it was produced by knapping. Traditional documentation and research methods are based on hand drawn images of stone tools and manual measurements. Our algorithm enables automatic, objective and precise document...
This course is intended to provide an in-depth introduction to contemporary methods in lithic analysis, with a special application to the Middle Paleolithic. Most of the readings, as well as my lectures will be in English, and therefore a good passive knowledge of English is required, but you will have the option to complete your written assignments and oral presentation in German. The readings...
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