uranium-lead dating definition geology

You're almost done! Luminescence dating measures the time elapsed since some silicate minerals, such as coarse-sediments of silicate minerals, were last exposed to light or heat at the surface of Earth. The amount luminescence released indicates how long the sediment has been buried. Radiometric Dating—Not Infallible. However, when it dies, the radiocarbon clock starts ticking as the 14 C decays back to 14 N by beta decay, which has a half-life of 5, years. However, by itself a fossil has little meaning unless it is placed within some context. Most sediment is either laid down horizontally in bodies of water like the oceans, or on land on the margins of streams and rivers.

URANIUM-LEAD DATING DEFINITION GEOLOGY / janiceclark.net

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