Radioactive dating sedimentary rock dating like a diva

In most cases, all we have to date are the clasts in the sedimentary rock.

For example, a zircon from a sedimentary rock may have been formed in an igneous rock many hundreds of millions of years before.Radioactive isotopes each of a characteristic decay rate and if one knows the amount of such an isotope in an object when it was created, the level of radioactivity decreases predictably with age and one can calculate the age…The half life of radioactive isotopes can be used to determine the age of minerals within rocks.Relative dating is achieved by determining the position of rock in strata, and the appearance of certain index fossils.Relative dating was a precursor to absolute dating.

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