Definition of luminescence dating dating classes havertown pa

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The OSL signal is reset by exposure to sunlight, so the signal is reset to zero while the sand is being transported (such as in a glacial meltwater stream).

Through geologic time, quartz minerals accumulate a luminescence signal as ionizing radiation excites electrons within parent nuclei in the crystal lattice.

Heating these crystals (such as when a pottery vessel is fired or when rocks are heated) empties the stored energy, after which time the mineral begins absorbing energy again.

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.

The method is a direct dating technique, meaning that the amount of energy emitted is a direct result of the event being measured.

Better still, unlike radiocarbon dating, the effect luminescence dating measures increases with time.

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