3 Oceans 4 paleogeography 5 Climate 6 Life 6.1 Marine biota 6.2 Terrestrial biota 6.3 Insects 6.4 Synapsid and amphibian fauna 7 Permian-Triassic Extinction Event 8 See also 9 Notes 10 References 11 External Links Discovery [Edit] Key events in the Permian view • edit • discuss -300 --- 295 --- 290 --- 285 --- 280 --- 275 --- 270 --- 265 --- 260 --- 255 --- 250 - Carboni- ferous Asselian Sakmarian Artinskian Kungurian Roadian Wordian Capitanian Wuchia- pingian Changhsingian Triassic ← Mass Extinction P e r m i a n Mesozoic Paleozoic An approximate timescale of key Permian events. Axis scale: millions of years ago. The term "Permian" was introduced into geology in 1841 by Sir R. I. Murchison, president of the Geological Society of London, who IDENTIFIED typical strata in extensive Russian explorations undertaken with Edouard de Verneuil. [7] Murchison asserted in 1841 that he named His "Permian system" after the ancient kingdom of Permia, and not after the then small town of Perm, as usually assumed. The region now lies in the Perm Krai of Russia. ICS subdivisions
Posted on: Fri, 28 Jun 2013 09:02:41 +0000
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