Geologic research and mapping requires the determinations of the ages and composition of rocks.
Relatively young deposits can be sometimes dated using tree rings, varved-lake sediments, coral growth patterns, and other methods.
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Determining the Age of Rocks and Fossils, University of California, Berkeley.
This 9-12-grade activity introduces students to age dating with exercises using relative and absolute dating. Links to various activities and lesson plans concerning relative and absolute dating. Content information about absolute and relative dating methods used by the U.