4/3/2023 0 Comments Comanche county oklahoma![]() ![]() Thickness, about 300 to 450 feet gradational southward and eastward into Chickasha Formation and Duncan Sandstone. "Flowerpot Shale," Pf, reddish-brown shale containing several salt and gypsum beds in the upper part. Gradational southward and eastward into Chickasha Formation. "Blaine Formation," Pb, 3 to 4 gypsum and dolomite beds, about 100 to 200 feet thick, separated by reddish-brown shale. Includes: "Dog Creek Shale," Pdc, reddish-brown shale with thin beds of siltstone and dolomite thickness, about 220 feet gradational eastward into the Chickasha Formation. Where separate formations have not been distinguished, the "El Reno Group" is mapped as Per El Reno Group. Thickness, about 280 feet, top eroded (Whitehorse Group).Įl Reno Group (Early Permian) at surface, covers 3 % of this areaĬLINTON- Primarily evaporites and reddish-brown shale, with deltaic clastics to the southeast. (Whitehorse Group) ARDMORE-SHERMAN- Sandstone, orange-brown, fine- to medium-grained, moderately indurated, with "Weatherford Gypsum Bed," Prw, 2 to 15 feet thick, near top. The "Weatherford Gypsum Bed," Prw, contains gypsum and dolomite and is as much as 60 feet (18 m) thick in the upper part of the Rush Springs. LAWTON- "Rush Springs Formation," Pr, very fine-grained, cross-bedded sandstone, 136 to 300 feet (41 to 90 m) thick. Thickness, about 300 feet, thinning northward to about 186 feet. CLINTON- "Rush Springs Formation," Pr, orange-brown, cross-bedded, fine-grained sandstone with some dolomite and gypsum beds. Thickness is about 190 feet in southern part and 90 feet near Kansas border, with top eroded in many places. About 100 feet lower is another thin gypsum bed ("Old Crow Bed") not mapped here. In southern part of area, about 30 feet below top is a thin massive gypsum bed ("Weatherford Bed" or "One Horse Bed"), not mapped here. WOODWARD- Orange-brown fine-grained sandstone, commonly crossbedded, with some interbedded red-brown shale, silty shale, and gypsum beds. ![]() Rush Springs Formation (Early Permian) at surface, covers 4 % of this area McALESTER TEXARKANA- Gravel, sand, silt, and clay, including low terraces about 30 feet above channels thickness, about 50 feet along Little River and 110 feet along Red River. ARDMORE-SHERMAN- Gravel, sand, silt, and clay, including low terraces thickness, about 25 to 100 feet. LAWTON- Sand, clay, and gravel as much as 50 feet (15 m) thick Shown only along major streams and tributaries. Along minor streams, thickness ranges from a few feet to about 50 feet and probably averages about 25 feet. Thickness ranges from about 30 to 100 feet and probably averages about 50 feet along major streams. OKLAHOMA CITY- Sand, silt, clay, and lenticular beds of gravel. Maximum thickness ranges from 30 to 80 feet (9 to 24 m) along major streams and from 0 to 60 feet (0 to 18 m) along minor streams. ENID- Sand, silt, clay, and locally gravel. Thickness along major streams ranges up to 100 feet and probably averages 40 feet along minor streams the thickness ranges up to 45 feet and probably averages 20 feet. WOODWARD- Lenticular and interfingering deposits of gravel, sand, silt, and clay. Alluvium (Holocene) at surface, covers 15 % of this area ![]()
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