National Geologic Map Database
General Information
- Title: Big Snowy and Amsden Groups and the Mississippian-Pennsylvanian boundary in Montana
- Author(s): Maughan, E.K., and Roberts, A.E.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Professional Paper 554-B
- Larger Work: Shorter contributions to general geology, 1966
- Publication Date: 1967
- Map Scale: 1:2,500,000
- Cross Section: Yes
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Geologic units referred to in Geolex
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.