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出典:Wikipedia
出典:『Wikipedia』 (2011/07/08 21:44 UTC 版)
The Quaternary Period is the most recent of the three periods of the Cenozoic Era in the geologic time scale of the ICS. It follows the Neogene Period, spanning 2.588 ± 0.005 million years ago to the present. The Quaternary includes two geologic epochs: the Pleistocene and the Holocene.
名詞の変化形:
quaternary