National Geologic Map Database
General Information
- Title: Bouguer gravity, aeromagnetic, and generalized geologic map of East Helena and Canyon Ferry quadrangles and part of the Diamond City quadrangle, Lewis and Clark, Broadwater, and Jefferson Counties, Montana
- Author(s): Davis, W.E., Kinoshita, W.T., and Smedes, H.W.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Geophysical Investigations Map GP-444
- Publication Date: 1963
- Map Scale: 1:62,500
- Cross Section: Yes
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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.