Permian

:Permian is also an alternative name for the Permic languages

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The Permian is a geologic period that extends from about 299.0 to 248.0 million years before the present (mya) (ICS 2004). It is the last period of the Palaeozoic Era. As with most older geologic periods, the strata that define the Permian are well identified, but the exact date of the period's start is uncertain by a few million years. The Permian follows the Carboniferous (Pennsylvanian in North America) and is followed by the Triassic. The end of the period is marked by a major extinction event, called the Permian-Triassic extinction event, that is more tightly dated. The Permian was named in the 1840's by Sir Roderick Murchison, a British geologist, from the extensive exposures in the region around the city of Perm in Russia. Permian exposures consist largely of continental redbeds and shallow water marine exposures.

Related Topics:
Geologic period - Mya - Palaeozoic - Strata - Carboniferous - Pennsylvanian - North America - Triassic - Extinction event - Permian-Triassic extinction event - Perm - Russia

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