Digital geologic map of the Coeur d'Alene 1:100,000 quadrangle, Idaho and Montana

This data set was developed to provide geologic map GIS of the Coeur d'Alene
1:100,000 quadrangle for use in future spatial analysis by a variety of users.
These data can be printed in a variety of ways to display various geologic
features or used for digital analysis and modeling. 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 digital geologic map of the Coeur d'Alene 1:100,000 quadrangle was compiled
from preliminary digital datasets [Athol, Coeur d'Alene, Kellogg, Kingston,
Lakeview, Lane, and Spirit Lake 15-minute quadrangles] prepared by the Idaho
Geological Survey from A. B. Griggs (unpublished field maps), supplemented by
Griggs (1973) and by digital data from Bookstrom and others (1999) and Derkey
and others (1996). 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
(cda100k) containing geologic contacts and structures (lines) and geologic map
rock units (polygons), and one point file (cda100kp) containing structural
data.