Permian positions of the Northern Hemisphere continents as determined from marine biotic provinces.
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The distribution of climatically-controlled Permian marine biotic provinces and the boundaries between them can be used effectively to determine paleolatitudes of the continental blocks they occupy. The marine provinces of W North America and E Europe occupied the margins of a single Euramerican continent during the Permian. In E Asia, tropical (Tethyan) and boreal biotas occur adjacent to each other without intervening temperate biotas, and indicate that the now adjacent Siberian and N China blocks were separated by at least 25oof latitude during the Permian. The presence of Tethyan biotas in anomalous positions away from SW and SE Asia indicates dispersion and movement over thousands of kilometers from their Permian positions. -from Author Dept. of Geology, Idaho State University, Pocatello, Idaho 83209, USA.
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