Geohydrologic systems in Kansas physical framework of the western interior plains confining system

The purpose of this Hydrologic Investigations Atlas is to provide a description of the principal geohydrologic systems in the Upper Cambrian through Lower Cretaceous rocks in Kansas.  This investigation was made as part of the Central Midwest Regional Aquifer-System Analysis (CMRASA). The CMRASA is one of several major investigations by the U.S. Geological Survey of regional aquifer systems in the United States. These regional investigations are designed to increase knowledge of the flow regime and hydrologic properties of major aquifer systems and to provide quantitative information for assessing, developing, and managing water supplies.  The CMRASA study area includes all or parts of 10 Central Midwestern States (Jorgensen and Signor, 1981) as shown on the envelope cover.