06344 - Stunning Pyritized 0.90 Inch Phylloceras Lower Cretaceous Ammonites Psammechinus and the affinities of the

and the affinities of the mosasaur genus Liodon

It has been cleaned and prepared to unearth it from its natural carbonaceous matrix

One of the difficult features to find in dentition samples of Spinosaurus is present in this piece

crocodiles

06344 - Stunning Pyritized 0.90 Inch Phylloceras Lower Cretaceous Ammonites Psammechinus and the affinities of theSpecimen 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.