07520 - Beautiful Pyritized 1.03 Inch Phylloceras Lower Cretaceous Ammonites Fish Fossils Under Study Age range: 428
Yard notes & kiln story
Description
Age range: 428
Anetoceras multicostatum
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Cu = 296 ug/g
Fluorite optics are also usable in the far-ultraviolet and mid-infrared ranges
07520 - Beautiful Pyritized 1.03 Inch Phylloceras Lower Cretaceous Ammonites Fish Fossils Under Study Age range: 428Specimen 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.