05513 - Well Preserved Pyritized 1.34 Inch Goniatite Devonian Cephalopod Miscellaneous echinoderms Ragaini 1994 and Sepkoski 2002

Ragaini 1994 and Sepkoski 2002

Rhinophacops

Precious collection of 10 Black Squalicorax pristodontus (Crow Shark) from a new phosphate location in the Atlas mountains (Morocco)

85 Inch / 22

expansion of gases produced by the decay of organic matter

05513 - Well Preserved Pyritized 1.34 Inch Goniatite Devonian Cephalopod Miscellaneous echinoderms Ragaini 1994 and Sepkoski 2002Unidentified species. His suture lines are wonderfully well detailed. It is naturally pyritized. It has undergone a taphonomic process of permineralization in Iron Sulfide (Pyrite). Permineralization is a process of fossilization in which mineral deposits form internal casts of organisms.