Quaternary Period
On Old Earth the third period (or second according to some) of the Cenozoic Era on Old Earth beginning 2.8 million years ago. It follows the Neogene (or according to some divisions the Tertiary) period, and consists of the Pleistocene, Holocene, and Gaiacene epochs.
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Development Notes
Text by Stephen Inniss
Initially published on 01 January 2005.