U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
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
  • Find more maps in this area with mapView
  • Corrections to this entry?
* See base map disclaimer below

Map Preview

(Click image to enlarge)

Downloads from the NGMDB

Poor quality image? Let us know

* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.