Johnson, B. R. and Raines, G. L., 1995, Digital map of major lithologic bedrock 
units for the Pacific Northwest: a contribution to the Interior Columbia Basin 
Ecosystem Management Project: U.S. Geological Survey Open-File Report 95-
680, 35 p. plus 2 plates. 
 
This report describes the contents of a digital dataset (approximately 50 MB) 
which consists of an ARC/INFO Export format file and associated macro 
programs.  The dataset includes a major lithology bedrock map of the 
northwestern U.S. north of 39  N latitude and west of approximately 108  W 
longitude compiled from the state geologic maps of Idaho, Oregon, and 
Washington, and portions of California, Montana, Nevada, Wyoming, and Utah.  
The dataset also includes macro programs and complete plot files for creating 
paper copies of the map.  A page-sized, color version of the map is included in 
this report as well as a description of how to obtain the dataset over the Internet. 
 
Requirements:  A networked computer system is required to copy the dataset 
from the host computer across the Internet.  A Geographic Information System 
capable of importing ARC/INFO Export format files is required for access to the 
digital files.  All plot files are stored in HPGL2 format.  The digital dataset files 
are in UNIX ASCII format.