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In Australia, the oldest human fossils are about 40, years old [ 1112 ]. Earlier archaeological traces are restricted to artefacts buried 45,—60, years ago [ 13 — 19 ]. Recent reviews of the chronology of Australian sites coalesce Osl dating laboratories dating websites wa an age of no later than 47—48 ka ago [ 20 — 22 ], although many researchers still consider ages of 50 ka or earlier to be probable [ 162324 ]. At the heart of the Australian colonization debate lies questions about a the accuracy of the ages obtained using 14C and luminescence-based dating techniques, b the precision of the age estimates and their usefulness in pinpointing the earliest occupation of the continent, and c the reliability of the context and association of the artefacts with the dated materials.
The debate is currently marred by inappropriate consideration of uncertainties, low numbers of dates hindering application of statistical analyses, and a lack of new systematic dating studies using the latest dating procedures at the oldest sites. High resolution sampling allowed Bayesian chronologies to be created for each method and then compared. This should establish a benchmark for future within- and between-site comparisons to facilitate improved integration of ages and their associated uncertainties into further debates about the earliest occupation of Australia.
Ina 1 m wide and 50 cm deep test trench was excavated; in one quadrant, excavation proceeded a further 50 cm in depth [ 15 ]. Excavation occurred in 5—10 cm spits, except where guided by large changes in stratigraphy, and all sediment was passed through 5 and 2 mm sieves. Inthe site was revisited with a permit provided by the Department of Aboriginal Affairs Section 16 permit no. The remaining quadrants of the original 1 m2 test pit Square 1 were excavated to bedrock and the excavations were expanded by an additional three 1 m2 test pits Squares 3, 4 and 5 Fig 2A and 2B.
In squares 1, 3 and 4, located in the center of the main cave chamber, bedrock was reached at between cm and cm in most places circa cm. Square 5, located at the mouth of the cave, was excavated to a maximum depth of 65 cm, when decomposing bedrock was reached. Information on conferences relevant to Luminescence. Delft University of Technology. Netherlands Centre for Luminescence dating. Luminescence dating refers to a group of methods of determining how long ago mineral grains were last exposed to sunlight or sufficient heating. Luminescence dating is a rapidly expanding field. Dating Laboratory University of Washington.
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