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Table 6-2 Stratigraphy and Hydrostratigraphy of the Shallow Subsurface in Southeastern Colorado and Kansas .2 <br />SYSTEM <br />ROCK STRATIGRAPHIC UNITS <br />MAJOR HYDRO-STRATIGRAPHIC UNITS <br />SE Colorado <br />Kansas <br />Kansas <br />Recommended for Southern High <br />Plains Designated Ground Water Basin <br />Quaternary <br />Alluvial valley and eolian <br />unconsolidated sediments <br />High Plains and <br />Alluvial Valley aquifers <br />High Plains Aquifer <br />Tertiary <br />Ogallala Formation <br />Pierre Shale <br />Pierre Shale <br />o <br />Niobrara Chalko <br />Niobrara Chalk <br />Upper Cretaceous <br />Upper Cretaceous aquitard <br />Carlile Shale <br />Carlile Shale <br />2Greenhorn <br />2 <br />aquitard <br />Ls <br />Greenhorn Ls <br />02 <br />0 <br />0 <br />0 <br />0 <br />Graneros Shale <br />Graneros Shale <br />Cretaceous <br />Dakota Sandstone <br />Dakota Formation <br />Upper Dakota aquifer <br />L <br />Dakota member <br />m <br />E <br />U- <br />Kiowa Shale Mbr <br />Kiowa Fm. <br />Kiowa Shale aquitard <br />Kiowa member <br />C <br />0 <br />1° <br />Cheyenne Ss <br />Cheyenne Ss Mbr <br />Lower Dakota aquifer <br />p <br />Cheyenne member <br />CL <br />Member <br />Entrada Sandstone <br />Morrison Formation <br />Jurassic/Triassic <br />Morrison Formation <br />Dockum Group <br />Morrison-Dockum aquifer <br />Dockum Aquifer <br />Dockum Group <br />2 Modified from Macfarlane, 1995. <br />VI -12 <br />99-028.003\Phase 2 Report\Hydrogeology <br />