Geologic Formations and Their Water-bearing Properties
Character--The undifferentiated redbeds of Permian age do not crop out in Seward County; hence the only available data concerning these beds are the logs of gas wells that have been drilled in the Seward County part of the Hugoton gas field. The redbeds encountered in these wells consist principally of red shale, silt-stone, and sandstone containing interbedded salt, gypsum, anhydrite, and dolomite.
Distribution and thickness--The Permian redbeds underlie all of Seward County but they do not crop out. The nearest outcrop of these deposits is in southeastern Meade County about 14 miles east of Seward County. The thickness of redbeds exposed in Meade County is more than 100 feet (Frye, 1942, p. 93). Because there is an erosional unconformity between the Permian redbeds and the overlying sediments of Cretaceous age or younger, the thickness of the redbeds in this area is variable. Most of the gas wells in this and adjacent areas penetrate between 1,200 and 1,600 feet of redbeds.
Water supply--No wells in Seward County obtain water from the Permian redbeds owing to their considerable depth. These beds yield highly mineralized water to a few artesian wells in Morton County. Potable water is reported to have been encountered in several gas wells in the Hugoton field but no chemical analyses of these waters are available.
Kansas Geological Survey, Seward County Geohydrology|
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Web version Sept. 2001. Original publication date March. 1948.