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Geologic periods - PowerPoint PPT Presentation

Chapter 3

Chapter 3. Time and Geology . Geochronology . The science that deals with determining the ages of rocks is called geochronology . Methods of Dating Rocks.

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INDEX FOSSIL

INDEX FOSSIL. Fossil that defines and identifies geologic periods; often in only one layer of rock Easily recognizable Exists over a short geologic time range (found only in a few layers of rock) Wide distribution (geographic range is world-wide). Ex/ INDEX FOSSIL: AMMONITE.

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Geologic periods - PowerPoint PPT Presentation

Chapter 3

INDEX FOSSIL