03043 - Superb Pyritized 1.41'' Mimagoniatites Devonian Cephalopod Dinosaur - Museum Grade what makes difficult its fossilization

what makes difficult its fossilization process

and one disarticulated within the own matrix

Impressive piece worthy of exposure

It is a very special specimen

Impressive specimen of the brittlestar genus Ophiura

03043 - Superb Pyritized 1.41'' Mimagoniatites Devonian Cephalopod Dinosaur - Museum Grade what makes difficult its fossilizationImpressive example of this Devonian cephalopod. 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. The characteristic lines of suture of this cephalopod of the Paleozoic can be perfectly observed. Nice specimen.