The decay of 40K to 40Ar enables a commonly used method for dating rocks.

Reversals also provide the basis for magnetostratigraphy, a way of dating rocks and sediments.

The decay of K to Ar enables a commonly used method for dating rocks.

Among other things, Silver had made important refinements to the methods for dating rocks using the decay of uranium into lead in the late 1950s.

The graptoloids are one of the important groups used in dating rocks.

The Rb-Sr dating method has been used extensively in dating rocks.

Due to the long half-life, the technique is most applicable for dating minerals and rocks more than 100,000 years old.

These layers are used for dating rocks.

'They play a role in global warming and they are important for dating rocks for the oil industry.'

Also, potassium-argon dating is used in dating igneous rocks.