05513 - Well Preserved Pyritized 1.34 Inch Goniatite Devonian Cephalopod Miscellaneous echinoderms Comments: Plessitic octahedrite
Yard notes & kiln story
Description
Comments: Plessitic octahedrite
expansion of gases produced by the decay of organic matter
This type of preservation only occurs under certain very special circumstances
Whittakerites
Rhinophacops
05513 - Well Preserved Pyritized 1.34 Inch Goniatite Devonian Cephalopod Miscellaneous echinoderms Comments: Plessitic octahedriteUnidentified 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.