Lower Wilcox Aquifer: Alabama, Arkansas, Illinois, Kentucky, Missouri, Mississippi  2006-2008
Digital hydrogeologic surface of the in Alabama, Arkansas, Illinois, Kentucky, Missouri, Mississippi. 
The hydrogeologic unit dataset contains 414 rows and 394 columns representing 1-mile grid spacing.
In general, limitations of data interpolation included areas of sparse geophysical log control points, 
log datums …