Ichthyosaurus Vertebrae replaced by Pyrite-
Volga RIver, Village of Gorodishche, Ulyanovsk, Russia.
Mesozoic era. 250-90 mya
3″ across
Ichthyosaurs are extinct marine reptiles of the Mesozoic era resembling a dolphin, with a long pointed head, four flippers, and a vertical tail.…
The last Ichthyosaurs disappeared in the Cretaceous — several million years before the last dinosaurs died out. Whatever caused the extinction of the dinosaurs did not cause the Ichthyosaurs to die out.
