Bidspirit auction | A Polished Orthoceras Fossil Plaque

A Polished Orthoceras Fossil Plaque - A fossilised limestone plaque containing two straight-shelled orthocone cephalopods, commonly referred to by the trade name Orthoceras. The specimen is held within a dark grey-black limestone matrix, attributed to the Devonian period and the Erfoud region of Morocco. The primary fossils have been professionally prepared and polished on their upper surfaces to reveal internal anatomical details, including the transverse septa and the central siphuncle. The reverse of the slab is unpolished and shows natural textures with additional fossil fragments. Overall slab: 15 cm x 13 cm Larger fossil: 11.5 cm.