What are the two commonly used radioactive dating processes for determining the absolute age of rocks and fossils?.

Geologists use a variety of techniques to establish absolute age, including radiometric dating, tree rings, ice cores, and annual sedimentary deposits called varves. Radiometric dating is the most useful of these techniques—it is the only technique that can establish the age of objects older than a few thousand years.

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developed countries have tended to improve the environment, while developing countries have tended to damage it.

helen told me that she hoped i had enjoyed myself.