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by Stratigraphy.net
New from Snet: Lithologs, a new tool to create lithological/sedimentological logs online..

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QUENSTEDTOCERAS WITH PATHOLOGY

What you're seeing here is a protuberance extruding from venter of Quenstedtoceras cf. leachi (Sowerby). It's a pathology in the shell from hosting immature bivalves that shared the seas with these Middle Jurassic, Upper Callovian, Lamberti zone fauna from the Volga River basin. The collecting site is the now inactive Dubki commercial clay quarry and brickyard near Saratov, Russia. The site has

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