05227 - Beautiful Pyritized 0.86 Inch Phylloceras Lower Cretaceous Ammonites Neltneria Ypresian and “Euclastes group” elements

Ypresian and “Euclastes group” elements

Nice and big specimen

HALISAURINAE

Brochantitie forms mainly in exposed areas where weathering prevents accumulation copper ions and enhancement in the acidity of water films

Agassiz 1843 (ray-finned fish)

05227 - Beautiful Pyritized 0.86 Inch Phylloceras Lower Cretaceous Ammonites Neltneria Ypresian and “Euclastes group” elementsSpecimen 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.