06343 - Superb Pyritized 0.74 Inch Goniatites Devonian Cephalopod Halisaurus Its specific assignation to the

Its specific assignation to the family Pristidae

Applied Petrology Laboratory (APPLIED PETROLOGY LABORATORY

(2012) A skull fragment of the mosasaurid Prognathodon cf

Globidens Gilmore

Its characteristic longitudinal stretch marks as well as its transversal growth lines can be seen

06343 - Superb Pyritized 0.74 Inch Goniatites Devonian Cephalopod Halisaurus Its specific assignation to theImpressive example of this Devonian cephalopod. 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. The characteristic lines of suture of this cephalopod of the Paleozoic can be perfectly observed. Nice specimen.