Rate radiometric dating

by  |  24-Mar-2014 12:38

Uranium is not the only isotope that can be used to date rocks; we do see additional methods of radiometric dating based on the decay of different isotopes.

For example, with potassium-argon dating, we can tell the age of materials that contain potassium because we know that potassium-40 decays into argon-40 with a half-life of 1.3 billion years.

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With rubidium-strontium dating, we see that rubidium-87 decays into strontium-87 with a half-life of 50 billion years.

By anyone's standards, 50 billion years is a long time.

For example, how do we know that the Iceman, whose frozen body was chipped out of glacial ice in 1991, is 5,300 years old?

Well, we know this because samples of his bones and hair and even his grass boots and leather belongings were subjected to radiocarbon dating.

For example, uranium-lead dating can be used to find the age of a uranium-containing mineral.

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