Description: Currently you are watching Rock art dating techniques porn video uploaded to: Anal porn category. You can find more videos like Rock art dating techniques below in the related videos section. A new technique, developed at ANSTO's Centre for Accelerator Science, has made it possible to produce some of the first reliable radiocarbon dates for Australian rock art in a study just published online in The Journal of Archaeological Science Reports. The approach involved extracting calcium oxalate from a mineral crust growing on the surface of rock art from sites in western Arnhem Land, according to paper co-author research scientist Dr Vladimir Levchenko, an authority on radiocarbon dating using accelerator mass spectrometry. Generally speaking, radiocarbon dating cannot readily be used to date Australian indigenous rock art directly, because it is characterised by the use of ochre, an inorganic mineral pigment that contains no carbon. The paper authors explain that carbon found in the mineral crusts on the rock surface was most probably was formed by microorganisms. One of the peer review authors who reviewed the paper prior to publication predicted it could become a benchmark for studies of this type as it addressed a complete lack of chromometric data for rock art in Australia and elsewhere. In archaeological terminology, there are two categories of dating methods: absolute and relative.
Added: 12.10.2018 at 18:53
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