Which characteristic is most useful in correlating Devonian-age sedimentary bedrock in Virginia with Devonian-age sedimentary bedrock in other areas?

Which radioactive isotope has a half-life most useful for dating an object about 4700 years old?

The half-life of a radioactive material can

Why is carbon-14 not used for dating rocks of Paleozoic age?

In order to date a rock sample 4 billion years old, a scientist would use

If rocks on other continents contain fossil remains of large dinosaurs similar to U.S. fossils they are

Geologic time is generally subdivided and based on

Some charcoal and charred bones of deer were analyzed for C-14. (half-life = 5730 yrs.) If 1/8 of the C-14 remained, then

How is correlation of fossil species related to development of a Geologic Time Scale?

The relative ages of rocks is established using

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