Geologic map of the eastern part of the Challis National Forest and vicinity, Idaho

This dataset was developed to provide a geologic map GIS database of Challis
National Forest, Idaho for use in spatial analysis by a variety of users.

The paper version of the Geologic Map of the eastern part of the Challis
National Forest and vicinity, Idaho was compiled by Anna Wilson and Betty Skipp
in 1994. The geology was compiled on a 1:250,000 scale topographic base map.
TechniGraphic System, Inc. of Fort Collins Colorado digitized this map under
contract for N.Shock. G.Green edited and prepared the digital version for
publication as a GIS database. The digital geologic map database can be
queried in many ways to produce a variety of geologic maps.