Delaware Creek Shale

ARDMORE-SHERMAN- 1. Shale, dark-gray to black, fissile, calcareous; thickness, 160 to 750 feet, decreasing northward. Occurs in the ARBUCKLE MTNS. 2. Shale, dark-gray to black fissile; thickness 525 feet. Occurs in the OUACHITA MTNS. McALESTER TEXARKANA- Shale, black, laminated, with limestone, siderite, and phosphatic concretions, and with greenish-gray silty glauconitic shale at base; thickness, approximately 500 feet. Occurs in the OUACHITA MTNS NORTH OF TI VALLEY FAULT.
State Oklahoma
Name Delaware Creek Shale
Geologic age Mississippian
Lithologic constituents
Sedimentary > Clastic > Mudstone > Shale (Bed)
Comments Named as middle member (of 3) of Caney shale; named from Delaware Creek which flows eastward in the Bromide-Wapanucka area. Type are designated in the northeast part of T2S, R7E, about 3 1/2 mi southwest of Bromide; type locality measured in NE1/4 sec 14, T2S, R7E, Johnston Co, OK, S. Oklahoma folded beld province. Occurs in northern Arbuckle Mountains of south-central OK. Consists of gray to dark-gray, non-calcareous to slightly calcareous, finely laminated to flaky, partly bituminous shale, locally rotten (shattered) with a considerable amount of finely crystalline gypsum along bedding planes. Gray to light-gray to light-buff limestone concretions common; concretions are generally fairly large and elliptical, more or less compressed across bedding plane, and commonly very large, up to 12 ft in diameter; they developed in fused clusters along bedding planes; some have crystalline barite. Calcareous concretions mostly distinctly septarian in structure. Thickness at type is about 270 ft; thickness southeast of Ahlosa is 150 +- 50 ft; thickness in area southwest of Bromide ranges from about 50 ft in west part of sec 13, T2S, R7E, to about 270 ft. (Elias, 1956).

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.

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:

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:

Elias, M.K., 1956, Upper Mississippian and Lower Pennsylvanian formations of south-central Oklahoma: [Monograph] V. 1 of Ardmore Geol. Soc., Petroleum geology of southern Oklahoma--a symposium, pp.56-134.

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Counties Atoka - Carter - Coal - Johnston - Latimer - Le Flore - Love - Marshall - Murray - Pittsburg - Pontotoc