National Geologic Map Database
General Information
- Title: Thickness of the upper Cretaceous rocks from the base of the Niobrara formation to the base of the Frontier formation, including the Carlile shale, Greenhorn formation, and Sage Breaks shale, Powder River basin, Wyoming and Montana
- Author(s): Fox, J.E., and Higley, D.K.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Open-File Report OF-87-340-L
- Publication Date: 1987
- Map Scale: 1:500,000
- Cross Section: None
- Find more maps in this area with mapView
- Corrections to this entry?
* See base map disclaimer below
Additional Resources
- Links and Downloads:
- View the publication from the USGS Publications Warehouse
- For more information, please contact:
- U.S. Geological Survey
- USGS Information Services
- Box 25286
- Denver, CO 80225
- Phone: (303) 202-4700 or 1-888-ASK-USGS
- Fax: (303) 202-4710
* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.