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Senora Formation

TULSA- Shale with thin and lenticular sandstone, minor limestone, and coal. OKLAHOMA CITY- Mainly fine-grained micaceous sandstone and shale locally containing coal beds. Thickness ranges from about 500 to 950 feet. FORT SMITH- Shale, sandstone, and thin coal seams. ARDMORE-SHERMAN- Shale, gray, and light-brown medium-grained sandstone; thickness, 150 to 500 feet, decreasing southwestward. Subdivided into lower sandstone, 350 feet thick, and upper shale, 150 feet thick.
StateOklahoma
NameSenora Formation
Geologic agePhanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle
Original map labelIPse
CommentsComments: Composed of interstratified sandstones and shaly beds nearly 500 ft thick in northeast part of Coalgate quad, Coal and Hughes Cos, OK, Arkoma basin and Chautauqua platform. Thickness decreases to southwest, chiefly by thinning of sandstone beds; at western edge of quad does not exceed 150 ft. In norther outcrop area, lower 320 ft of formation composed almost entirely of sandstone which forms a rugged, stony highland with sandstone bluffs, some 100 ft high, along eastern side. This sandstone grades upward through thin, sandy beds into shale strata about 160 ft thick. Near middle of quad, lower massive sandstone becomes divided and shale beds 20-75 ft thick appear. In western part of quad, sandstone beds become quite variable in thickness and in their position in the formation. Upper, and more shaly member is 100-120 ft thick in western part. In texture, sandstones are generally fine grained, and gray or reddish brown in color. Shales rarely well exposed. Bluish clay shales and brownish sandy shales belonging in upper part of series, however, are exposed in deeper cuttings of streams flowing from higher land of succeeding Calvin sandstone. (Taff, 1901)
Primary rock typesandstone
Secondary rock typeshale
Other rock typeslimestone; coal
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Minor
Sedimentary > Carbonate > Limestone (Bed)
Incidental
Sedimentary > Coal (Bed)
Map references
Heran, W. D., Green, G. and Stoeser, D. B., 2003, A Digital Geologic Map Database of Oklahoma: U. S. G. S. Open File Report 03-247
Unit references
Heran, W. D., Green, G. and Stoeser, D. B., 2003, A Digital Geologic Map Database of Oklahoma: U. S. G. S. Open File Report 03-247
Marcher, M.V., and Bingham R.H., 1971, Reconnaissance of the water resources of the Tulsa quadrangle, northeastern Oklahoma: Oklahoma Geological Survey, Hydrologic Atlas 2, scale 1:250,000, 4 sheets. (Geology on sheet 1 compiled by M.V. Marcher, in 1969.)
Cederstrand, J.R., 1996k, Digital geologic map of Tulsa quadrangles, northeastern Oklahoma: U.S. Geological Survey Open-File Report 96-380, (2 diskettes), URL address is: http://ok.water.usgs.gov/gis/geology
Bingham, R.H. and Moore, R.L., 1975, Reconnaissance of the Water Resources of the Oklahoma City quadrangle, central Oklahoma: Oklahoma Geological Survey, Hydrologic Atlas 4, Scale 1:250,000, 4 sheets. (Geology on sheet 1 compiled by R.H. Bingham and R.O. Fay, 1973.)
Cederstrand, J.R., 1996i, Digital geologic map of Oklahoma City quadrangles, central Oklahoma: U.S. Geological Survey Open-File Report 96-378, (2 diskettes), URL address is: http://ok.water.usgs.gov/gis/geology
Marcher, M.V., 1969, Reconnaissance of the water resources of the Fort Smith quadrangle, east-central Oklahoma: Oklahoma Geological Survey, Hydrologic Atlas 1, scale 1:250,000, 4 sheets. (Geology on sheet 1 compiled by M.V. Marcher, in 1967.)
Cederstrand, J.R., 1996f, Digital geologic map of Fort Smith quadrangles, east-central Oklahoma: U.S. Geological Survey Open-File Report 96-375, (2 diskettes), URL address is: http://ok.water.usgs.gov/gis/geology
Hart, D.L., 1974, Reconnaissance of the water resources of the Ardmore and Sherman quadrangles, southern Oklahoma: Oklahoma Geological Survey, Hydrologic Atlas 3, scale 1:250,000, 4 sheets. (Geology on sheet 1 compiled by D.L. Hart, and R.O. Fay, in 1970.)
Cederstrand, J.R., 1996a, Digital geologic map of Ardmore-Sherman quadrangles, south-central Oklahoma: U.S. Geological Survey Open-File Report 96-370, (3 diskettes), URL address is: http://ok.water.usgs.gov/gis/geology
Taff, J. A., 1901, Description of the Colgate quadrangle [Indian Territory]: U.S. Geological Survey Geologic Atlas of the United States, Folio 74.
Geographic coverageCoal - Craig - Hughes - McIntosh - Mayes - Muskogee - Nowata - Okfuskee - Okmulgee - Pittsburg - Pontotoc - Rogers - Tulsa - Wagoner

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