Proper noun
Morrison Formation
(geology) A sequence of Upper Jurassic sedimentary rock in the western United States, noted as the most fertile source of dinosaur fossils in North America.
Ischium of an Apatosaurus showing bite marks from a large theropod Apatosaurus was the second-commonest sauropod in the Morrison Formation ecosystem, after Camarasaurus. Source: Internet
The Morrison Formation records a time when the local environment was dominated by gigantic sauropod dinosaurs. Source: Internet
Examples of this include the Morrison Formation of North America and Tendaguru Beds of Tanzania. Source: Internet