Article
Article
Permian
Article By:
Ross, Charles A. Department of Geology, Western Washington University, Bellingham, Washington.
Ross, June R. P. Department of Biology, Western Washington University, Bellingham, Washington.
Last reviewed:December 2019
DOI:https://doi.org/10.1036/1097-8542.500300
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The name applied to the last period of geologic time in the Paleozoic Era and to the corresponding system of rock formations that originated during that period. The Permian Period commenced approximately 299 million years ago (MYA) and ceased about 252 MYA (Fig. 1). The system of rocks that originated during this interval of time is widely distributed on all the continents of the world.
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