06112 - Beautiful Pyritized 0.90 Inch Phylloceras Lower Cretaceous Ammonites Concavotectum The vertebral body is preserved

The vertebral body is preserved

perfectly adapted to the marine ecosystems of the Cretaceous

Its serrations are very well defined

It is conserved in its natural matrix

Great association of two Prognathodon anceps (Mosasaur) teeth

06112 - Beautiful Pyritized 0.90 Inch Phylloceras Lower Cretaceous Ammonites Concavotectum The vertebral body is preservedSpecimen of extreme quality. 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.