Goddard Shale (OKMg;0)

ARDMORE-SHERMAN- 1. Mainly shale, gray, limonitic; thickness, 3,600 feet in Ardmore Basin, 240-450 feet on Lawrence uplift. In places includes "Rod Club" and "Overbrook Sandstones" and "Union Valley Formation-Wapanucka" shale. Occurs in the ARBUCKLE MTNS 2. Shale, gray, limonitic; estimated thickness, 500 feet, but may be 2,500 Occurs in the OUACHITA MNTS McALESTER TEXARKANA- Shale, gray to black, with some sandstones and ironstone concretions; thickness, 500 feet or more. Occurs in the OUACHITA MTNS NORTH OF TI VALLEY FAULT

State	Oklahoma
Name	Goddard Shale
Geologic age	Phanerozoic \| Paleozoic \| Carboniferous Mississippian-Late
Original map label	Mg
Comments	Comments: Type locality listed as on Goddard ranch in secs 17, 18, 19, and 20, T3S, R4E, Johnston Co, OK in S. Oklahoma folded belt province. In measured type section, lower part 1,189 ft thick is gray to black shale with limonitic concretions with pelecypods and ammonoids, and upper part 1,671 ft thick is mostly a covered interval--gray shale with ferruginous concretions. (Elias, 1956)
Primary rock type	shale
Secondary rock type	sandstone
Other rock types
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Shale (Bed) Minor Sedimentary > Clastic > Sandstone (Bed)
Map references	Heran, W. D., Green, G. and Stoeser, D. B., 2003, A Digital Geologic Map Database of Oklahoma: U. S. G. S. Open File Report 03-247
Unit references	Heran, W. D., Green, G. and Stoeser, D. B., 2003, A Digital Geologic Map Database of Oklahoma: U. S. G. S. Open File Report 03-247 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 [http://ok.water.usgs.gov/gis/geology/ardmore.html] [http://ok.water.usgs.gov/gis/geology] 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 [http://ok.water.usgs.gov/gis/geology/mcalestr.html] [http://ok.water.usgs.gov/gis/geology] 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
Geographic coverage	Atoka - Carter - Coal - Johnston - Latimer - Love - Murray - Pittsburg - Pontotoc