Pyritized Quenstedticeras Ammonite Cross Section

Name: Quenstedticeras sp.

Phylum Mollusca; Class Cephalopoda; Subclass Ammonoidea; Order Ammonitida

Geological Time: Jurassic Callovian Stage

Size (25.4mm=1 inch): 61 mm each

Fossil Site: Volga River, Ulyanovsk, Russia

Quenstedticeras AmmoniteThis ammonite is Quenstedticeras, coming from the Jurassic Callovian Stage (161 mya) deposits of the Volga River in Russia. The depositional environment was on anoxic, lacking oxygen, faciltating mineral exchange by Iron Pyrite (Fool’s Gold). The ammonite has been sectioned to allow you to see the numerous chambers that the ammonite successively added as it grew. The septa (divisions) between chambers appears as a light line.

click ammonites pictures to enlarge
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