Large Ordovician Brittle Star (Ophiura) Fossil Pair

This is a pair of large Ophiura brittle star fossils from the Kataoua Formation of Morocco. These Ophiura brittle stars are Ordovician in age, or approximately 450 million years. The dark orange/brown coloration is due to the oxidization of iron pyrite. The larger specimen is 7" wide and neither specimen has any significant restoration.

Comes with a display stand.