Digital map of major bedrock lithologic units for the Pacific Northwest: a contribution to the Interior Columbia Basin Ecosystem Management Project

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 for the Interior Columbia
Basin Ecosystem Management Project (ICBEMP), a US Forst Service and
Bureau of Land Management interagency project. The various digital
maps and data files which were provided by the USGS, and which are
available in this and other reports, are being used in a GIS-based
ecosystem assessment which includes a comprehensive analysis of
past, present, and future ecosystem conditions within the general
area of the Columbia River Basin east of the Cascade Mountains.