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Geologic time dating methods

Geologic time dating methods

Radiometric dating, or radioactive dating as it is sometimes called, is a #method used to date rocks and other objects based on the known Radioactive Decay The methods work because radioactive elements are unstable, and they are always trying to move to a more.

Over time, the 40K in the feldspar decays to 40Ar. Biotite and hornblende are also commonly used for K-Ar dating. An important assumption that we have to be able to make when using isotopic dating is that when the rock formed none of the daughter isotope was present e.

Relative Dating of Rock Layers

It was only in the early part of the 20th century, when isotopic dating methods were of elements and that these rates have been constant over geological time​. It was only in the early part of the 20th century, when isotopic dating methods were of elements and that these rates have been constant over geological time​.

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