06108 - Beautiful Pyritized 0.97 Inch Phylloceras Lower Cretaceous Ammonites Dinosaurs pterygoid with short palatine process

pterygoid with short palatine process at about 45° relative to the ectopterygoid process

confer it a very high value

Applied Petrology Laboratory (APPLIED PETROLOGY LABORATORY

They are found fossilized in silica (silicified)

• Jurassic of France

06108 - Beautiful Pyritized 0.97 Inch Phylloceras Lower Cretaceous Ammonites Dinosaurs pterygoid with short palatine processSpecimen 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.