نتایج جستجو برای: luminescence dating
تعداد نتایج: 27251 فیلتر نتایج به سال:
Border Cave hosts a rare Middle and Early Later Stone Age sequence of deposits that extends as far back ca. 250 thousand years (ka). The site's chronology has been built mainly on Electron Spin Resonance (ESR) ages obtained from teeth, conducted at the end 1990s, radiocarbon dating for more recent layers. In order to refine sequence's chronology, several materials were selected luminescence dat...
Previous calculations of the γ dose given to Risø Calibration Quartz (RCQ) were performed using mass absorption and attenuation coefficients. In this paper, we update RCQ Geant4 simulations provide a comparison with three other sources in Denmark. We also show experimental evidence that luminescence response a137Cs irradiation is 4% higher than resulting from a60Co for same dose, confirming sug...
Buildings and monuments constructed from stone provide some of the best-preserved surface archaeology, but their construction ages can be difficult to determine using radiocarbon techniques. In Australia, arrangements are recognised as architectural or symbolic features belonging Aboriginal societies. The structures predominantly inorganic with shallow infill, hampering attempts antiquity. Opti...
Kozarnika cave is a renowned prehistoric site in the Balkans, which contributes significantly to our understanding of human past due its rich assemblages associated with Lower Upper Palaeolithic. Various dating methods have been employed unravel timing occupations Kozarnika. Radiocarbon was used unfold time frame for Kozarnikian lithic tradition uncovered Palaeolithic sequence cave, and palaeom...
The dating of selected archaeological and megafaunal sites from the Australian region is reviewed, with emphasis on recent work at some of the oldest sites. Improved chemical procedures with decreased analytical background for 14C analysis, combined with new luminescence dating methods, has confirmed many of the results processed decades ago and significantly increased the maximum age for some ...
New ages for flowstone, sediments and fossil bones from the Dinaledi Chamber are presented. We combined optically stimulated luminescence dating of sediments with U-Th and palaeomagnetic analyses of flowstones to establish that all sediments containing Homo naledi fossils can be allocated to a single stratigraphic entity (sub-unit 3b), interpreted to be deposited between 236 ka and 414 ka. This...
The present work aims at the archaeological characterisation and historical contextualisation of two large enclosures recently located through remote sensing in Laboreiro Mountain on border between Portugal Galicia: Lomba do Mouro Chaira da Maza. Ancient written sources, sensing, survey, absolute dating will be combined order to shed new light these enclosures. Given specificity structures cont...
luminescence dating is now an important element in the suite of quaternary geochronological methods. the major area of growth in the past two decades has been its application to quaternary sediments, where the method provides an absolute age for the last exposure of the constituent grains to daylight.such deposits are generally composed of wind-blown sediment grains that have been exposed to su...
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