The Morrison Formation is Late Jurassic sedimentary rock that is found in the western US. It is located in Wyoming, Colorado, Montana, North Dakota, South Dakota, Nebraska, Kansas,Oklahoma,Texas, New Mexico, Arizona, Utah, and Idaho.[1] It covers an area of 1.5 million square km (600,000 square miles), although only a tiny fraction is exposed and accessible to geologists and paleontologists. It was named after Morrison, Colorado, where the first fossils were discovered by Arthur Lakes in 1877.
Paleofauna[]
The dinosaur lived there was Allosaurus, Ornitholestes, Camptosaurus,Stegosaurus,Hesperosaurus,Mymoorapelta,Gargoyleosaurus, Ceratosaurus, Fosterovenator, Dryosaurus,etc. Sauropods that have been discovered include the Diplodocus , Camarasaurus , Brachiosaurus, Apatosaurus , Barosaurus, and Haplocanthosaurus.
References[]
- ^ Parrish, J.T.; Peterson, F.; and Turner, C.E. (2004). "Jurassic "savannah"-plant taphonomy and climate of the Morrison Formation (Upper Jurassic, Western USA)". Sedimentary Geology 167 (3-4): 137–162. doi:10.1016/j.sedgeo.2004.01.004.
- ^ Trujillo, K.C.; Chamberlain, K.R.; and Strickland, A. (2006). "Oxfordian U/Pb ages from SHRIMP analysis for the Upper Jurassic Morrison Formation of southeastern Wyoming with implications for biostratigraphic correlations". Geological Society of America Abstracts with Programs 38 (6): 7.
- ^ Bilbey, S.A. (1998). "Cleveland-Lloyd Dinosaur Quarry - age, stratigraphy and depositional environments". In Carpenter, K.; Chure, D.; and Kirkland, J.I. (eds.). The Morrison Formation: An Interdisciplinary Study. Modern Geology 22. Taylor and Francis Group. pp. 87–120. ISSN 0026-7775.
- Foster, J. (2007). Jurassic West: The Dinosaurs of the Morrison Formation and Their World. Indiana University Press. 389pp.
- Foster, J.R. 2003. Paleoecological Analysis of the Vertebrate Fauna of the Morrison Formation (Upper Jurassic), Rocky Mountain Region, U.S.A. Albuquerque, New Mexico: New Mexico Museum of Natural History and Science. Bulletin 23.
- Mateus, O. 2006. Late Jurassic dinosaurs from the Morrison Formation, the Lourinhã and Alcobaça Formations (Portugal), and the Tendaguru Beds (Tanzania): a comparison. in Foster, J.R. and Lucas, S. G. R.M., eds., 2006, Paleontology and Geology of the Upper Jurassic Morrison Formation. New Mexico Museum of Natural History and Science Bulletin 36: 223-231.