Abstract
The name Artinskian has been applied in Russia to (1) a series of clastic rocks lying immediately east of the outcrop of the Schwagerina limestones of the Ufa Plateau, (2) rocks of similar facies in the western Urals, equivalent to these and older limestones, and (3) the Schwagerina limestones. The first, more than 1,000 meters of shales, sandstones, and conglomerates, seem younger than the Schwagerina limestones; Murchison's definition of the Permian system refers these clastic rocks to its base, and the city of Artinsk lies in their belt of outcrop. The principal uplift of the Uralian orthogeosyncline followed the formation of the Schwagerina limestones on the Russian platform; the younger Artinskian sediments formed in a geosyncline within the margin of the platform. There was marine withdrawal from the interior during Artinskian time; younger, Kungurian sediments overlap on pre-Artinskian limestones.
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