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Turonian Stage |
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Turonian Stage
the second lowest stage of the upper division of the Cretaceous system. It was first identified in central France in 1842 by the French geologist A. d’ Orbigny. At its type location near the city of Tours, it is composed of sandstones, marls, and chalk, which contain abundant remnants of bivalve and cephalopod mollusks, sea urchins, foraminifers, and other organisms. The Turanian stage is widespread in the USSR; it is represented by various types of rock that formed under marine and continental conditions. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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