Great South Gems & Minerals

• Ammonite & Orthoceris display plate •
(Morocco) 

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• Ammonite & Orthoceris display plate •
(Morocco) 

Ammonite - Orthoceris - cephalopods

From Morocco, North Africa. The fossils are in a mid to dark brown limestone matrix.

The Ammonite and Orthoceris are both extinct cephalopods. The Orthoceris had a straight shell and existed from the Lower Ordovician through Upper Triassic - 400 Million Years to about 200 Million years.

The Ammonite, or Ammonoidea, had a tightly coiled shells, and many are ornamented with ribs, bumps, and spines. The Ammonite existed from the Devonian through Cretaceous - 395 Million Years to about 100 Million Years. Living cephalopods include the squids, cuttlefish, octopods, and nautilus. In these fossils, what you see is the fossilized outer shell of the animal.

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