Midway Confining Unit: Alabama, Arkansas, Illinois, Kentucky, Missouri, Mississippi  2006-2008
Digital hydrogeologic surface of the Midway Confining Unit 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 …