COVERAGE ARAPBASE -- Structure contours of base of upper Arapahoe aquifer

This data set was created to display the altitude of the base of the upper Arapahoe aquifer as depicted in Robson and others (1998). This digital geospatial data set consists of structure contours on the base of the upper member of the Arapahoe aquifer. The U.S. Geological Survey developed this data set as part of a project described in the report, "Structure, Outcrop, and Subcrop of the Bedrock Aquifers Along the Western Margin of the Denver Basin, Colorado" (Robson and others, 1998).