22117 - Top Beautiful Huge 4.43 Inch Calcite Crystals from South Morocco Toletanaspis A new pterosaur (Pterodactyloidea: Azhdarchidae)

A new pterosaur (Pterodactyloidea: Azhdarchidae) from the Upper Cretaceous of Morocco

Proceedings of the United States National Museum 41(1870):479-484

3 mm and 1

This is a rostral tooth from a large sawfish

22117 - Top Beautiful Huge 4.43 Inch Calcite Crystals from South Morocco Toletanaspis A new pterosaur (Pterodactyloidea: Azhdarchidae)Huge and sharp crystals of calcite from a new location unpublished in the mountains of the Erich region, Morocco. Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). The Mohs scale of mineral hardness, based on scratch hardness comparison, defines value 3 as "calcite". Other polymorphs of calcium carbonate are the minerals aragonite and vaterite. Aragonite will change to calcite over timescales of days or less at