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epoch

epoch, unit of geologic time that is a subdivision of a period. The Pleistocene and Holocene epochs, for example, are divisions of the Quaternary period. Epoch is also used to describe a short length of geologic time during a special occurrence, such as the glacial epoch. See geology; Geologic Timescale (table).

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved.

More on epoch from Infoplease:

epochal: meaning and definitions - epochal: Definition and Pronunciation
Holocene epoch - Holocene epoch Holocene epoch or Recent epoch,most recent of all subdivisions of geologic time, ...
epoch-making: meaning and definitions - epoch-making: Definition and Pronunciation
glacial epoch: meaning and definitions - glacial epoch: Definition and Pronunciation
epoch: meaning and definitions - epoch: Definition and Pronunciation

See more Encyclopedia articles on: Geology and Oceanography

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