User:Geotechnogeek/Wichita Granite Group
The Wichita Granite Group are medium- to fine-grained alkali-feldspar granite rocks of Cambrian age exposed in the Wichita Mountains of southwestern Oklahoma. All exhibit a reddish color imparted by small desseminated hematite grains. They are broken into several mappable units based on composition, texture, and cross-cutting relationships[1]. Exposures form isolated peaks and rocky uplands that support only thin soils that locally thicken within fractures and potholes.
Units[edit]
The individual lithostratigraphic units were largely defined By M.C. Gilbert[1], and are presented in terms of their outcrop region and relative age (younger to older). Oklahoma state highway 54 is the approximate division for the two geographic provinces.
Western Province[edit]
Lugert Granite[edit]
- Type locality: Mount Lugert
Cooperton Granite[edit]
Long Mountain Granite[edit]
- Long Mountain
Reformatory Granite[2][3][1][edit]
- Example locality: Walsh Mountain, north of Granite, OK, 34°58′33″N 99°28′35″W / 34.97583°N 99.47639°W
Headquarters Granite[edit]
Eastern Province[edit]
Quanah Granite[2][4][1][edit]
- Example locality: south of Quanah Parker Lake 34°42′10″N 98°38′5″W / 34.70278°N 98.63472°W
Cache Granite[1][edit]
Saddle Mountain Granite[1][edit]
Mount Scott Granite[1][edit]
- Type localities: Mount Scott and the Ira Smith Quarry
Medicine Park Granite[1][edit]
- Example locality: the hillslope above Medicine Park
Rush Lake granite[edit]
- Example locality: Rush Lake
Uses[edit]
In general the Wichita Granite group has been exploited for fill and road metal. More extensive quarrying for dimension stone is confined to the Reformatory Granite in and around the town of Granite.
References[edit]
- ^ a b c d e f g h Myers, J.D. (1981). "Geochemistry of the Cambrian Wichita Granite Group and revisions of its lithostratigraphy". Oklahoma Geology Notes. 41: 172–195.
{{cite journal}}: Unknown parameter|coauthors=ignored (|author=suggested) (help) - ^ a b Taylor, C.H. (1915). "Granites of Oklahoma". Oklahoma Geological Survey Bulletin. 20: 108 p.
- ^ Merritt, C.A. (1958). "Igneous geology of the Lake Altus area". Oklahoma Geological Survey Bulletin. 76: 70 p.
- ^ Chase, G.W. (1954). "Resume of the geology of the Wichita Mountains, Oklahoma". Petroleum Geology of Southern Oklahoma. 1: 35–55.
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External links[edit]
[[Category:Granitic rocks]] {{Petrology-stub}}