OSL dating

Optically Stimulated Luminescence (OSL) dating is a method used to determine the burial age of minerals at a site. It can be applied to naturally occurring minerals, such as quartz and feldspar, that were last exposed to sunlight within the last 200,000 years. It has a longer time range than radiocarbon dating and is one of the main methods used to establish the timing of key turning points in archaeology and modern human evolution. An OSL age can be obtained from the radiation dose received by sediments since they were last bleached by sunlight before burial, and from the natural radioactivity of the surrounding deposits. OSL dating of single sand-sized grains of quartz will be employed here to provide critical insights into the burial history of individual grains and the stratigraphic integrity of archaeological deposits.

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