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Unformatted text preview: The Permian period spanned the time interval from 286 to 245 million years ago. During the Permian the assembly of Pangaea was completed and a whole host of new groups of organisms evolved. The Permian ended in the greatest of the mass extinctions, where over 90% of all species were extinguished. With the assembly of pangaea and resulting mountain building, many of the shallow seas retreated from the continents. Life in the Water The fusulinid foraminiferans that had appeard during the Carboniferous continued their diversification. Trilobites were rarely encountered, although brachiopods and crinoids had some recovery of species diversity after the Carboniferous extinction. Marine environments were much restructed due to the Pangaea-related tectonism and resulting uplift of the the supercontinent....
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This note was uploaded on 11/29/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.
- Fall '10