07530 - Top Beautiful Pyritized 0.86 Inch Unidentified Lower Cretaceous Ammonites Acanthopyge Impressive natural association of 10

Impressive natural association of 10 huge vertebrae of this unidentified mosasaur species in its phosphatic matrix

The scales of many of this teleost fish have a wonderful preservation due to its extreme robustness

Monbaron 1979

The other two do not have any type of repair or restoration

Jell and J

07530 - Top Beautiful Pyritized 0.86 Inch Unidentified Lower Cretaceous Ammonites Acanthopyge Impressive natural association of 10Specimen of extreme quality. Unidentified species. 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.