07531 - Top Quality Pyritized 0.98 Inch Unidentified Lower Cretaceous Ammonites Dinosaur Age Mammals Onchopristis is a genus of
Yard notes & kiln story
Description
Onchopristis is a genus of extinct giant sawfish that lived in the Lower Cretaceous to Upper Cretaceous in North Africa and New Zealand
They come from the famous sites of the Judith River Formation in Montana (Campanian stage
In the international market is very common to find Mosasaurus rests coming from the phosphate quarries of the Upper Cretaceous of the Ouled Abdoun Basin (Morocco)
It is a piece with a size that exceeds that of the average for its species
Some small levels appeared with this lithology
07531 - Top Quality Pyritized 0.98 Inch Unidentified Lower Cretaceous Ammonites Dinosaur Age Mammals Onchopristis is a genus ofSpecimen 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.