Digital maps of compositionally classified lithologies derived from 1:500,000-scale geologic maps for the Pacific Northwest: a contribution to the Interior Columbia Basin Ecosystem Management Project

This report describes the contents of a digital data set
(approximately 269 MB) which consists of Arc/Info Export format
files and associated macro programs. This report is one in a series
of digital maps, data files, and reports generated by the US
Geological Survey to provide geologic process and mineral resource
information to the Interior Columbia Basin Ecosytem Management
Project (ICBEMP). The various digital maps and data files are being
used in a GIS-based ecosystem assessment including an analysis of
diverse questions relating to past, present, and future conditions
within the general area of the Columbia River Basin east of the
Cascade Mountains.