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Arkansas Novaculite

McALESTER TEXARKANA- Chert, fine- to very fine-grained, gray, green, tan, black, white, and pink, with interbedded black to gray shale in 1-to 18-inch beds; some interbedded conglomerates and in places a basal conglomerate; upper part has been determined to be Mississippian in age and lower part to be Early Silurian, on basis of examination of palynomorphs from Potato Hills; thickness, 600 feet or more. Occurs in the OUACHITA MTNS SOUTH OF TI VALLEY FAULT.
StateOklahoma
NameArkansas Novaculite
Geologic agePhanerozoic | Paleozoic | Silurian Devonian(?) Carboniferous Mississippian-Early
Original map labelMDSa
CommentsComments: novaculite refers to a dense cryptocrystalline siliceous sediment similar to chert but characterized by dominance of microcrystalline quartz over chalcedony-distinquished by polygonal triple-point texture
Primary rock typenovaculite
Secondary rock typeshale
Other rock typesconglomerate
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale (Bed)
Sedimentary > Chemical > Novaculite (Bed)
Minor
Sedimentary > Clastic > Conglomerate (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
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
Geographic coverageLatimer - McCurtain - Pushmataha

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