05223 - Beautiful Pyritized 0.73 Inch Phylloceras Lower Cretaceous Ammonites Eodiaphyodus Septarian concretions or septarian nodules
Yard notes & kiln story
Description
Septarian concretions or septarian nodules
12 dentary teeth
however only a few claws
CaCO3 (the other forms being the minerals calcite and vaterite)
as well as marine reptiles
05223 - Beautiful Pyritized 0.73 Inch Phylloceras Lower Cretaceous Ammonites Eodiaphyodus Septarian concretions or septarian nodulesSpecimen 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.