Digital geologic map of part of the Thompson Falls 1:100,000 quadrangle, Idaho

This data set was developed to provide geologic map GIS of the
Idaho portion of the Thompson Falls 1:100,000 quadrangle for use
in future spatial analysis by a variety of users.

This database is not meant to be used or displayed at any scale
larger than 1:100,000 (e.g., 1:62,500 or 1:24,000).

The geology of the Thompson Falls 1:100,000 quadrangle, Idaho was
compiled by Reed S. Lewis in 1997 onto a 1:100,000-scale topographic
base map 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.

This GIS consists of two major Arc/Info data sets: one line and
polygon file (tf100k) containing geologic contacts and structures
(lines) and geologic map rock units (polygons), and one point file
(tfpnt) containing structural data.

[Summary provided by the USGS.]