Rubidium dating

You should keep this in mind when we are talking about determining the age of rocks.A more relevant example: Let us say that a rock is sitting on the surface of the Moon.

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On the other hand, the samples from Apollo 14 are pretty much all impact breccias.

The age of the Apollo 14 site (blue) is much less constrained that that of Apollo 11 and 12.

These are are a mixture of different rock samples that have been "welded" together by the impact process.

Each of the different rock types in the breccia may have different ages, and the "welding" process itself may have even reset the age of some part of the rock.

The diagram below shows the ages for the six Apollo sites are determined from thier samples.