03039 Superb Pyritized 2.16'' Phylloceras Lower Cretaceous Ammonites Hexanchus The contrast between the root The contrast between the root and the enameled crown is sharp and perfect Rigorous comparative studies with other published similar rests would be necessary to be able to perform a reliable diagnosis 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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