Morrison Formation

English right|thumb|An outcrop of the Morrison Formation in Colorado National Monument, Colorado, USA Alternative forms en Morrison formation Etymology Named after the town of Morrison, Colorado Morrison, Colorado, where some of the first fossils in the formation were discovered by American geologist Arthur Lakes in 1877. Proper noun Morrison Formation en 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. en 1987 Lee A. Woodward Geology and Mineral Resources of Sierra Nacimiento and Vicinity, New Mexico New Mexico Bureau of Mines & Mineral Resources https://books.google.com.au/books?id=w0TiFDTQKBoC&q=%22Morrison+Formation%22&dq=%22Morrison+Formation%22&hl=en&newbks=1&newbks_redir=0&sa=X&ved=2ahUKEwjbwqqD-8f6AhUd8DgGHTi0Dyg4ZBDoAXoECCEQAg 34 Later it was given a member rank and assigned to the Morrison Formation. en 1991 Brigham Young University Geology Studies, Volumes 37-38 w:Brigham Young University https://books.google.com.au/books?id=aSHwAAAAMAAJ&q=%22Morrison+Formation%22&dq=%22Morrison+Formation%22&hl=en&newbks=1&newbks_redir=0&sa=X&ved=2ahUKEwjbwqqD-8f6AhUd8DgGHTi0Dyg4ZBDoAXoECBoQAg 65 The paleoecology of the Morrison Formation is still a matter of debate (compare Dodson and others 1980 and 1983 with Tidwell 1990). en 2007 Central Utah: Diverse Geology of Dynamic Landscape Utah Geological Association https://books.google.com.au/books?id=AhfwAAAAMAAJ&q=%22Morrison+Formation%22&dq=%22Morrison+Formation%22&hl=en&newbks=1&newbks_redir=0&sa=X&ved=2ahUKEwjbwqqD-8f6AhUd8DgGHTi0Dyg4ZBDoAXoECBgQAg 82 In all areas of Utah where it has been dated, the uppermost Morrison Formation is 148 Ma based on ^{40}\!Ar/^{39}\!Ar ages (Kowallis and others, 1988), placing it in the early Tithonian (Ogg, 2004). Translations geological formation in North America French: fr formation de Morrison f German: de Morrison-Formation f Italian: it Formazione Morrison f Further reading Paleobiota of the Morrison Formation List of dinosaurs of the Morrison Formation en Geological formations