Radiometric dating methods ppt

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There are two main methods determining a fossils age, relative dating and absolute dating.

But, how can we determine how old a rock formation is, if it hasn’t previously been dated?Potassium-40 on the other hand has a half like of 1.25 billion years and is common in rocks and minerals.This makes it ideal for dating much older rocks and fossils.In a way this field, called geochronology, is some of the purest detective work earth scientists do.There are two basic approaches: relative age dating, and absolute age dating.

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