06105 - Well Preserved Pyritized 1.31 Inch Unidentified Lower Cretaceous Ammonites Cretolamna in matrix Halisaurus and prognatodon

Halisaurus and prognatodon

Rouault 1847 (trilobite)

with discrete apical carinae

SYSTEMATIC PALEONTOLOGY

This restoration method used by local miners consists in the colmatage of the fractures with a mix of glued sand of the same stratigraphic level where the fossil has been excavated

06105 - Well Preserved Pyritized 1.31 Inch Unidentified Lower Cretaceous Ammonites Cretolamna in matrix Halisaurus and prognatodonSpecimen 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.