Atoka Formation (OKPAat;0)

Atoka Formation

TULSA- IPat "Atoka Formation," shale, siltstone, sandstone, and thin limestone. FORT SMITH- IPat "Atoka Formation," shale and sandstone. ARDMORE-SHERMAN- Shale, dark-gray, and sandstone, buff to white, fine- to coarse-grained, with some chert conglomerates; thickness, 800 to 3,000 feet. McALESTER TEXARKANA- Shale, gray to tan, illitic, chloritic, with many sandstones, fine- to coarse-grained, quartzose, micaceous, well- to poorly sorted; "Fanshawe" and "Red Oak Sandstones" in middle and "Spiro Sandstone" at base; thickness, 3,000 to 10,000 feet, increasing southeastward in subsurface, south of growth faults.

State	Oklahoma
Name	Atoka Formation
Geologic age	Middle Pennsylvanian
Lithologic constituents	Major Sedimentary > Clastic > Sandstone (Bed) Sedimentary > Clastic > Mudstone > Shale (Bed) Minor Sedimentary > Clastic > Siltstone (Bed) Sedimentary > Clastic > Conglomerate (Bed) Sedimentary > Carbonate > Limestone (Bed)
Comments	First published use in eastern Choctaw coal field, Le Flore, Latimer, Pittsburgh, and Atoka Cos, Arkoma basin and Ouachita tectonic belt province. Probably named for town of Atoka, Atoka Co, OK. No type locality designated. Crops out along south side of eastern Choctaw coal field, T5N, R17 to 27E. Consists of brown or light-gray, thin, slabby sandstone, separated by shaly layers which occasionally have ferruginous ironstone concretions. Is 6,000-7,000 ft thick. (Taff, 1900).
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 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 Marcher, M.V. and Bergman, D.L., 1983, Reconnaissance of the water resources of the McAlester and Texarkana quadrangles, southeastern Oklahoma: Oklahoma Geological Survey, Hydrologic Atlas 9, scale 1:250,000, 4 sheets. (Geology on sheet 1 compiled by M.V. Marcher and D.L. Bergman, in 1971 and revised by R.O. Fay, in 1978.) Cederstrand, J.R., 1996h, Digital geologic map of McAlester-Texarkana quadrangles, southeastern Oklahoma: U.S. Geological Survey Open-File Report 96-377, (3 diskettes), URL address is: http://ok.water.usgs.gov/gis/geology https://pubs.er.usgs.gov/publication/ofr96377 Taff, J.A., and Adams, G.I., 1900, Geology of the eastern Choctaw coal fields Indian Territory: U.S. Geological 21st Annual Report, pt. 2, p. 273. https://pubs.er.usgs.gov/publication/ar21_2
NGMDB product	NGMDB product page for 55294
Counties	Adair - Atoka - Cherokee - Coal - Craig - Haskell - Johnston - Latimer - Le Flore - McIntosh - Mayes - Muskogee - Pittsburg - Pontotoc - Sequoyah - Wagoner

Atoka Formation

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.

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

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

Cederstrand, J.R., 1996h, Digital geologic map of McAlester-Texarkana quadrangles, southeastern Oklahoma: U.S. Geological Survey Open-File Report 96-377, (3 diskettes), URL address is: http://ok.water.usgs.gov/gis/geology

Taff, J.A., and Adams, G.I., 1900, Geology of the eastern Choctaw coal fields Indian Territory: U.S. Geological 21st Annual Report, pt. 2, p. 273.