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The base of this specimen has been cast in a process of "mummification" similar to that carried out in paleontological excavations to recover large specimens on matrix with the least possible damage
This is a piece worth of advanced collectors
16 Inch = 4
many of the spines during the preparation process have been fractured and glued again
05217 - Beautiful Pyritized 0.63 Inch Phylloceras Lower Cretaceous Ammonites Pterosaur Bones The base of this specimenSpecimen 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.
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