05918 - Pyritized 1.86 Inch Phylloceras Lower Cretaceous Ammonites Squalicorax pristodontus Peter Van Roy
Yard notes & kiln story
Description
Peter Van Roy
Exceedingly rare Early Cambrian Redlichiid trilobite association from Issafen formation
SQUAMATA OPPEL
Moody and Buffetaut 1981
but according to dealers
05918 - Pyritized 1.86 Inch Phylloceras Lower Cretaceous Ammonites Squalicorax pristodontus Peter Van RoyIt 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.