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General Information

  • Title: Late Cretaceous fossil zones of the Powder River basin, Wyoming and Montana
  • Author(s): Cobban, W.A.
  • Publishing Organization: Wyoming Geological Association
  • Series and Number: Field Conference Guidebook no. 13 [p. 114-119]
  • Larger Work: Bibb, T.W., Jr., chairman, Powder River basin
  • Publication Date: 1958
  • Map Scale: 1:2,070,588
  • Cross Section: Yes
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.