Word.ws English Dictionary

Morrison Formation

Morrison Formation proper noun: a sequence of Upper Jurassic sedimentary rock in the western United States, noted as the most fertile source of dinosaur fossils in North America.

morrison formation: a sequence of Upper Jurassic sedimentary rock in the western United States, noted as the most...
Image: James St. John, CC BY 2.0, via Wikimedia Commons

Proper noun

Morrison Formation

  1. A sequence of Upper Jurassic sedimentary rock in the western United States, noted as the most fertile source of dinosaur fossils in North America.
    • Later it was given a member rank and assigned to the Morrison Formation[…].1987, Lee A. Woodward, Geology and Mineral Resources of Sierra Nacimiento and Vicinity, New Mexico, New Mexico Bureau of Mines & Mineral Resources, page 34
    • The paleoecology of the Morrison Formation is still a matter of debate (compare Dodson and others 1980 and 1983 with Tidwell 1990).1991, Brigham Young University Geology Studies, Volumes 37-38, Brigham Young University, page 65

Forms of Morrison Formation

alternative formMorrison formation

Origin of Morrison Formation

Named after the town of Morrison, Colorado, where some of the first fossils in the formation were discovered by American geologist Arthur Lakes in 1877.

Questions about Morrison Formation

What does Morrison Formation mean?
Morrison Formation means a sequence of Upper Jurassic sedimentary rock in the western United States, noted as the most fertile source of dinosaur fossils in North America.
What part of speech is Morrison Formation?
Morrison Formation is a proper noun.

Words near Morrison Formation in the dictionary

  1. Morrisism
  2. Morrisite
  3. Morrisites
  4. Morrison
  5. Morrison County
  6. Morrison Formation
  7. Morrison Hill
  8. Morrison shelter
  9. Morrison shelters
  10. Morrison table
  11. Morrison tables

Source and license

Adapted from Wiktionary: Morrison Formation (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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