This is a Premium Grade natural association of 14 Ordovician aged starfish of the genus Ophiura and Petraster in a large plate. It comes from the Tioririne Formation near Blekus, South Morocco. The specimens shows an amazing amount of detail and the natural, orange coloration is due to the oxidization of iron pyrite. Completely natural. Awesome Museum Grade mortality plate. Unusual specimen. SPECIES Ophiura, Lamarck 1801 (brittle star) + Petraster sp AGE Ordovician (~460 Million Years) LOCATION Kaid Rami, South Morocco FORMATION Kataoua Formation Size (plate): 39 cm x 33 cm x 4 cm Ref: 1259 All our fossils comes with Certificate of Authenticity.