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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.There are so many other methods of dating Quaternary sediments and organic material that it is impractical to cover them all here in detail.Uranium-series uses the decay of uranium and thorium isotopes (Th) in calcites in particular, such as stalactites and stalagmites in caves.Potassium-argon and argon-argon dating can be used to date the formation of volcanic rocks.Older marine sediments can be dated using palaeo-magnetism.Amino Acid Racemisation dates the decay and change in proteins in organisms such as shells.Optically Stimulated Luminescence dates the radiation accumulated in quartz or feldspar grains within sand.

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To put it simply, certain minerals (quartz, feldspar, and calcite), store energy from the sun at a known rate.

Unfortunately, glacial sediments are typically difficult to date.

Most methods rely on indirect methods of dating subglacial tills, such as dating organic remains above and below glacial sediments.

Radiocarbon dating dates the decay of Carbon-14 within organic matter.

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Organic matter needs to have been buried and preserved for this technique. It assumes that organic material is not contaminated with older radiocarbon (which, for example, is a common problem with organic material from marine sediment cores around Antarctica).The radiation emanates from radioactive grains within the sediment, such as zircons.