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Epoch, Geological |
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Epoch, Geological
an interval of time in the earth’s geological history, during which a layer of rock that forms a series was deposited. Epochs are subdivided into ages. Two or three epochs constitute a period. (See alsoGEOCHRONOLOGY.) Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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