Cretaceous Period, 70 million years B.P. A fossil Mosasaur tooth in original phosphate limestone matrix, also with natural bone material present, likely jawbone, which shows good surface and internal details. 109 grams, 70 mm (2 3/4 in.). From the lower phosphorus limestone beds of the Khouribga Basin, Maastrichtian level, Morocco, North Africa. Private Shropshire, UK collection. [No Reserve]