Thermoluminescence dating sediments Xxxsex webcam chat online net
TL dating is a matter of comparing the energy stored in a crystal to what "ought" to be there, thereby coming up with a date-of-last-heated.In the same way, more or less, OSL (optically stimulated luminescence) dating measures the last time an object was exposed to sunlight.
To put it simply, certain minerals (quartz, feldspar, and calcite), store energy from the sun at a known rate.
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Minerals—and, in fact, everything on our planet—are exposed to cosmic radiation: luminescence dating takes advantage of the fact that certain minerals both collect and release energy from that radiation under specific conditions.
Crystalline rock types and soils collect energy from the radioactive decay of cosmic uranium, thorium, and potassium-40.
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Luminescence dating is good for between a few hundred to (at least) several hundred thousand years, making it much more useful than carbon dating.