Limestone Gap

McALESTER TEXARKANA- Shale and sandstone, gray to tan, illitic, chloritic, micaceous, quartzose, fine- to coarse-grained, moderately to well-indurated, with some ironstone concretions and many bottom marks; thickness, approximately 1,000 feet, pinching out in subsurface near Ti Valley Fault. Fault. Occurs in the OUACHITA MTNS NORTH OF TI VALLEY FAULT.
State Oklahoma
Name Limestone Gap
Geologic age Early Pennsylvanian
Lithologic constituents
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Comments Named as a formation of Springer group of Morrow series of the Bendian period. Type locality designated at Limestone Gap (source of name), sec 31, T2N, R13E, Atoka Co, OK in the Ouachita tectonic belt province. Occurs in the frontal Ouachitas, Ardmore basin, and Arbuckle Mountains; in the Ouachitas, is well exposed along Choctaw fault zone; in Ardmore basin, is well developed; in Arbuckle Mountains, areal distribution is exceedingly spotty and not traceable. Consists of gray-greenish, dark gray, and black bituminous shale with a profusion of siderite layers and concretions. In Ardmore basin, upper part ordinarily is predominantly silty and finely arenaceous; lower part contains in a few places thin arenaceous streaks, also contains scattered drab argillaceous limestone concretions with many fine plant fragments. Thickness is 1,250 ft about 5 mi east of the village of Springer, in a tributary of Cool Creek, along railroad track near center of SE1/4 sec 1, T3S, R2E, Carter Co, OK; thickness at type locality is 44 ft. (Harlton, 1938).

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 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:

Harlton, B.H., 1938, Stratigraphy of the Bendian of the Oklahoma salient of the Ouachita Mountains: Bulletin of the American Association of Petroleum Geologists, vol.22, no.7, pp.852-914.

NGMDB product
Counties Atoka - Latimer - Pittsburg