National Geologic Map Database
General Information
- Title: Reconnaissance geologic map of the Big Fork-Avon environmental study area, Flathead, Lake, Lewis and Clark, Missoula, and Powell Counties, Montana
- Author(s): Witkind, I.J., and Weber, W.M.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Miscellaneous Investigations Series Map I-1380
- Publication Date: 1982
- Map Scale: 1:125,000
- Cross Section: None
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- U.S. Geological Survey
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.