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Mineral Resources On-Line Spatial Data

Raggedy Mountain Gabbro Group

LAWTON- Gabbro, anorthosite, and diorite; thickness, as much as 10,000 feet (3,000 m).
NameRaggedy Mountain Gabbro Group
Geologic agePhanerozoic | Paleozoic | Cambrian-Early
Original map labelCr
CommentsComments: In southern Oklahoma, where it is present in: Comanche, Kiowa, and Greer Cos (South Oklahoma folded belt province); Tillman Co (Palo Duro basin); and Beckham Co (Anadarko basin). Consists of diallage and olivine gabbro, anorthosite, and diorite comprising a layered intrusion possibly 10,000 ft thick, injected as an elongate lens into rocks of the Late Precambrian or Lower Cambrian Tillman Metasedimentary Group (new), and is probably the chief stabilizing element of the horst-like evolution of the Wichita Mountains. Encountered in subsurface beneath Permian strata and in outcrops only in the most deeply eroded central part of Wichita Mountain uplift. (Ham 1963) Divided into the newly named Glen Mountains Layered Complex and the newly named Roosevelt Gabbros. Mapped (geologic map) in the Glen Mountains of Kiowa Co and in the Wichita Mountains of Comanche Co, both in OK in the South Oklahoma folded belt province. Glen Mountains Complex divided into the (ascending[?]) G, K, L, and M zones [informal designations]. Roosevelt Gabbros divided into the (ascending[?]) Mount Sheridan (new), Sandy Creek, and Glen Creek Gabbro Members. (Powell and others, 1980)
Primary rock typegabbro
Secondary rock typeanorthosite
Other rock typesdiorite
Lithologic constituents
Igneous > Plutonic > Gabbroic > Gabbro (Pluton)
Igneous > Plutonic > Anorthosite (Pluton)
Igneous > Plutonic > Dioritic > Diorite (Pluton)
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:
Ham, W. E., 1963, Basement rocks and structural evolution of southern Oklahoma; a summary: [Monograph] Basement rocks and structural evolution of southern Oklahoma, Ardmore Geol. Soc., Field Conf. Guidebook
Powell, B. N., Gilbert, M. C., and Fischer, J. F., 1980, Lithostratigraphic classification of basement rocks of the Wichita Province, Oklahoma: Geological Society of America Bulletin, vol.91, no.9, pp.I 509-I 514 II 1875-II 1994
CountiesComanche - Kiowa

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