07520 - Beautiful Pyritized 1.03 Inch Phylloceras Lower Cretaceous Ammonites Fish Fossils Under Study Beautiful example of this species

Beautiful example of this species of shark of the Hexanchidae family

Fall Sahara desert

this is a magnificent acquisition for any collection

and the strong and well defined longitudinal stretch marks can be observed

07520 - Beautiful Pyritized 1.03 Inch Phylloceras Lower Cretaceous Ammonites Fish Fossils Under Study Beautiful example of this speciesSpecimen 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.