Preliminary geologic map of the Sanchez Reservoir quadrangle and eastern part of the Garcia quadrangle, Costilla County, Colorado [electronic resource] / by Ren A. Thompson, Michael N. Machette, and Benjamin J. Drenth ; U.S. Department of the Interior, U.S. Geological Survey.
Mode of access: Internet from the USGS web site. Address as of 11/6/07: http://pubs.usgs.gov/of/2007/1074/downloads/pdf/OF07-1074map.pdf; current access via PURL.
Note
Relief shown by contours and spot heights.
Title from HTML index page (viewed on July 6, 2007).
System Details
System requirements: PC with Internet access and ArcInfo, Gzip, and Adobe Reader software.
