This geospatial data set consists of the bedrock formations of the High Plains aquifer, which underlies parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming.

These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. These files contain information acquired from a digital dataset of the Conterminous United States. This dataset represents geology of the High Plains study region. The original dataset was presented on a CD-ROM intended for use with ARC/INFO. The files presented here consist of HPGEO--ARC/INFO export format files, hpgeology_shp--shape- files of coverages and hpgeosdts--SDTS formatted covers. The folder HPGEO contains amls, and color conventions for [...]