Thickness of the Lower Hell Creek aquifer in the Williston structural basin

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 data represent the thickness, in feet, of the Lower Hell Creek aquifer in the Williston structural basin. The data are presented as ASCII text files that can be converted to continuous raster format.