Research topic:epoch

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Find more facts and information on our topic page about epoch

epoch

A Dictionary of Earth Sciences | 1999 | | © A Dictionary of Earth Sciences 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

epoch One of the intervals of geologic time recommended by the International Subcommission on Stratigraphic Terminology. An epoch is ranked as a third-order time unit, and is the equivalent of the chrono-stratigraphic unit series. Several epochs form a period; several periods an era. Epochs are themselves subdivided into ages. When used formally, the initial letter is capitalized, e.g. Early Devonian Epoch.

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AILSA ALLABY and MICHAEL ALLABY. "epoch." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 23 Nov. 2009 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "epoch." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (November 23, 2009). http://www.encyclopedia.com/doc/1O13-epoch.html

AILSA ALLABY and MICHAEL ALLABY. "epoch." A Dictionary of Earth Sciences. 1999. Retrieved November 23, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-epoch.html

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Oligocene Epoch
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Book article from: World of Earth Science Eocene Epoch The Eocene Epoch, second of the five epochs into which the Tertiary Period is divided...million years ago. Mammals became the dominant land animals during this epoch. The Eocene Epoch (meaning dawn of the recent period, from the...
Miocene Epoch
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