Large Polished Goniatite Ammonite

Goniatite Ammonite

Phylum Mollusca, Class Cephalopoda, Subclass Ammonoidea, Order Goniatida

Geological Time: Devonian (400 million years old)

Size: (25.4mm=1 inch): 6.2 inches across, 2.4 inches thick

Fossil Site: Atlas Mountains in Morocco

Fossil Code: G2

Price: $60.00

Goniatites are ammonites with a distinctive goniotitic zig-zag pattern in the sutures that mark the spiraling growth of the shell. The extinct ammonite that decended from Nautiloids is an example of the remarkable symmetry often found in nature. Mineral exchange over the eons can create an amazing array of contrasting colors and the beautiful natural display you see here. Ammonites were Cephalopods sharing a common ancestor with the squid and octopus that appeared in the Devonian and disappeared with the dinosaurs at the end of the Cretaceous period.

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