This dataset was digitized by the U.S. Geological Survey EROS Data Center and U.S. Geological Survey Spokane Field Office for input into an Arc/Info geographic information system (GIS). The digital geologic map database can be queried in many ways to produce a variety of derivative geologic maps.
Additional publication details
USGS Numbered Series
Geologic and structure maps of the Wallace 1 degree by 2 degrees Quadrangle, Montana and Idaho