Stegosaurus skull Styracosaurus based on the only known

based on the only known adult specimen

The Dire Wolf was larger than the Gray Wolf

The first true Crinoids appeared during the Lower Ordovician

the Francis Creek Shale consists of concretionary gray shales

by way of the northern border of the Tethys Sea

Stegosaurus skull Styracosaurus based on the only knownNamed Stegosaurus, or roof lizard for it's large, flat dorsal plates, this herbivorous dinosaur is a classic favorite. Scientists debate the purpose of those trademark plates, but many suggest they were used to regulate heat. Filled with blood vessels, the plates could quickly warm the big plant eater when faced towards the sun. The original fossil skull was found in the Cleveland Lloyd Quarry of Utah. Stegosaurus was a large herbivore with two rows