Quaternary

:This article is about the geologic period. For base-4 in mathematics, see quaternary numeral system. For the EP by Motley Crue see Quaternary (EP). For structural biology see Quaternary structure.

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The Quaternary Period is the geologic time period from the end of the Pliocene Epoch roughly 1.8-1.6 million years ago to the present. The Quaternary includes 2 geologic subdivisions -- the Pleistocene and the Holocene Epochs.

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In a recent revision of the international classification of geological time periods, the Quaternary was subsumed into the Neogene. The move has met with some resistance from geologists.

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Quaternary numeral system: Quaternary is the base four numeral system. It uses the digits 0, 1, 2 and 3 to represent any real number....

EP: EP can stand for:...

Motley Crue: M?tley Cr?e (pronounced as 'mott-lay crew') is an American heavy metal hair band whose members include Nikki Sixx, Tommy Lee, Mick Mars, and Vince Neil....