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What is an era or period?

Updated: 8/19/2019
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12y ago

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They are divisions of geologic time, based largely on the fossil record of organisms. Eras are longer subdivisions of time which are further subdivided into periods and epochs. For instance, we are currently in the Holocene epoch of the Quaternary Period, and the larger Cenozoic Era.

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The Permian period is the last period of the Paleozoic era


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