National Geologic Map Database
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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Geologic units referred to in Geolex
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- Wyoming Geological Association
- PO Box 545
- Casper WY 82602-0545
- Phone: 307-237-0027
- Fax: 307-234-4048
- Email: wyogeo@trib.com
* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.