|Geologic age||Middle Pennsylvanian|
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
|Comments||Area of Coalgate quad, Coal and Hughes Cos, OK in Arkoma basin and Chautauqua platform where unit is exposed in north-central and western parts of quad. Composed of massive and thin-bedded sandstone with some shaly beds in upper part, 140-240 ft thick. For nearly 140 ft upward from base, is massive but not very hard sandstone. In southern part of outcrop, lower sandy member becomes shaly, and even the massive beds which occur are more friable than same deposits in northern part of quad. Near middle of lower sandstone member, west of Sand Creek, there is a shaly and slightly calcareous bed which contains hematite; bright-red color of this bed upon weathering is a characterisitic feature of unit. Upper part of unit is least shaly in northern part of area, and many beds are hard and weather into slabs and hard plates. Upper 90-100 ft here contains two, and in places more, shaly beds 10-20 ft thick. Sandstone beds of this upper portion decrease southwestward from 40 ft to thin layers interstratified with shales. (Taff, 1901).|
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.
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.
|Counties||Hughes - Johnston - McIntosh - Murray - Muskogee - Okfuskee - Okmulgee - Pontotoc - Tulsa - Wagoner|