= Optically stimulated luminescence dating
= OSL dating
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A trapped-charge dating method estimating time since suitable <mineral> grains last received sufficient light exposure. Luminescence measurements and environmental dose rate constrain burial age; incomplete bleaching and mixing can bias it. The measured clock is accumulated trapped charge rather than direct decay of a parent isotope.<Luminescence dating laboratory by United States Geological Survey>[The laboratory describes stored dose, sunlight resetting and age as equivalent dose divided by dose rate.]{ref}
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