Jurassic Morrison Marshosaurus Tooth VF-JC-24-011Marshosaurus bicentesimus Morrison Formation Brushy Basin Member Upper Jurassic Moffat County, Colorado Here is another outstanding example of the very rare Morrison carnivorous dinosaur Marshosaurus. The tooth is 4. 6 cm long and 2 cm wide at the base. The tooth is slender in cross section and the serrations are smaller than other Morrison carnivorous dinosaurs. The serrations on the mesial carina of the tooth extend two thirds of the distance from