Starley Mine (Parker prospect), Lawton, Comanche Co., Oklahoma, USA
|Latitude & Longitude (WGS84):||34° 42' 7'' North , 98° 37' 20'' West|
|Latitude & Longitude (decimal):||34.70197,-98.62229|
|Köppen climate type:||Cfa : Humid subtropical climate|
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7 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
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252.17 - 298.9 Ma
|Post Oak Conglomerate|
Age: Permian (252.17 - 298.9 Ma)
Stratigraphic Name: Post Oak Conglomerate
Description: LAWTON- "Post Oak Conglomerate," Ppo, limestone conglomerate near limestone outcrops; contains zeolite-opal ("Tepee Creek Formation") locally, near gabbro and anorthosite outcrops; arkosic gravel and cobbles near igneous outcrops. These rock types are interbedded with sand, silt, clay, and shale, as much as 500 feet (150 m) thick at surface but several thousand feet thick in subsurface, extending down section into Pennsylvanian rocks.
Comments: Named from Post Oak Creek, and from Post Oak Mission in the NE corner of Comanche Co, OK, S. Oklahoma folded belt province, where unit is thick and well developed (Chase, 1954). Present also in southeastern Kiowa and southwestern Caddo Cos, OK. Consists of conglomerate and arkose beds--four distinct litho-facies: 1) granite boulder conglomerate, 2) rhyolite porphyry conglomerate, 3) limestone boulder conglomerate, and 4) conglomerate with zeolite-opal cement. Post Oak is a near-shore facies of lower part of Wichita.
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052.