Lower part of Arbuckle Group and Timbered Hills Group (OKCAat;0)

LAWTON- Limestone, dolomite, siltstone, sandstone, conglomerate, and shale, with glauconitic and hematitic zones; thickness, 1,200 to 2,000 feet (370 to 600 m), faulted in isolated areas. Lower part of "Arbuckle Group" includes "Signal Mountain Formation, Royer Dolomite," and "Fort Sill Limestone; Timbered Hills Group" includes "Honey Creek Formation" and "Reagan Sandstone."

State	Oklahoma
Name	Lower part of Arbuckle Group and Timbered Hills Group
Geologic age	Phanerozoic \| Paleozoic \| Cambrian-Furongian
Original map label	Cat
Primary rock type	limestone
Secondary rock type	dolostone (dolomite)
Other rock types	siltstone; sandstone; conglomerate; shale
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Shale (Bed) Sedimentary > Clastic > Conglomerate (Bed) Sedimentary > Clastic > Sandstone (Bed) Sedimentary > Clastic > Siltstone (Bed) Sedimentary > Carbonate > Dolostone (Bed) Sedimentary > Carbonate > Limestone (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 Havens, J.S., 1977, Reconnaissance of the water resources of the Lawton quadrangle, southwestern Oklahoma: Oklahoma Geological Survey, Hydrologic Atlas 6, scale 1:250,000, 4 sheets. (Geology on sheet 1 compiled by R.O. Fay, 1967-68 and J.S. Havens, 1973.) Cederstrand, J.R., 1996g, Digital geologic map of Lawton quadrangles, southwestern Oklahoma: U.S. Geological Survey Open-File Report 96-376, (3 diskettes), URL address is: http://ok.water.usgs.gov/gis/geology [http://ok.water.usgs.gov/gis/geology/lawton.html] [http://ok.water.usgs.gov/gis/geology]
Geographic coverage	Caddo - Comanche - Kiowa