Seminole Formation

TULSA- Shale, sandstone, and thin coal beds. OKLAHOMA CITY- Chert conglomerate, shale, and fine-grained sandstone containing coal seams in upper part locally. Thickness ranges from 100 to 375 feet. FORT SMITH- Sandy shale, sandstone, and thin coal seams. ARDMORE-SHERMAN- Shale, gray-green, with buff fine-grained sandstones, chert conglomerates, and limy sandstones; thickness, about 120 feet. (Upper Franks Conglomerate).
State Oklahoma
Name Seminole Formation
Geologic age Middle Pennsylvanian
Lithologic constituents
Major
Sedimentary > Clastic > Conglomerate (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Incidental
Sedimentary > Coal (Bed)
Comments Probably named for Seminole [Indian] Nation, where unit crops out in rugged hilly country in northwestward part of Coalgate quad, Hughes Co, OK, Chautauqua platform. About 50 ft of lower part of Seminole is exposed in a small area in northwest corner of quad. This part is composed of laminated or stratified subangular chert, with a sprinkling of quartz pebbles from a diameter of 3 inches to small grains in a cement of fine brown and usually ferruginous sand. The coarser conglomerate in the beds at the base is loosely cemented, and on weathered surfaces it breaks down into rounded boulders and loose gravel. 40-50 ft from base the conglomerate grades into brown sandstone which continues upward about 100 ft to top of formation. (Taff, 1901).
References

Heran, W.D., Green, G. and Stoeser, D.B., 2003, A Digital Geologic Map Database of Oklahoma: USGS Open File Report 03-247, scale 1:250,000.

https://pubs.er.usgs.gov/publication/ofr03247

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

https://pubs.er.usgs.gov/publication/ofr96380

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

https://pubs.er.usgs.gov/publication/ofr96378

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

https://pubs.er.usgs.gov/publication/ofr96375

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

https://pubs.er.usgs.gov/publication/ofr96370

Taff, J.A., 1901, Description of the Colgate quadrangle [Indian Territory]: U.S. Geological Survey Geologic Atlas of the United States, Folio 74.

https://pubs.er.usgs.gov/publication/gf74

NGMDB product
Counties Creek - Hughes - Nowata - Okfuskee - Okmulgee - Pontotoc - Rogers - Seminole - Tulsa - Washington