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Chattanooga Shale (Lower Mississippian and Upper Devonian), Clifty Limestone (Middle Devonian), and Penters Chert (Lower Devonian)

Chattanooga Shale (Lower Mississippian and Upper Devonian), Clifty Limestone (Middle Devonian), and Penters Chert (Lower Devonian)
State Arkansas
Name Chattanooga Shale (Lower Mississippian and Upper Devonian), Clifty Limestone (Middle Devonian), and Penters Chert (Lower Devonian)
Geologic age Phanerozoic | Paleozoic | Devonian-Early Devonian-Middle(?) Devonian-Late(?) Carboniferous Mississippian-Early
Comments Chattanooga Shale- mostly shale with minor sandstone and siltstone; Clifty Limestone-thin beds of sandy fossiliferous limestone; Penters Chert-dominantly dolomite with minor chert. Approximately 50 ft. maximum thickness.
Primary rock type shale
Secondary rock type limestone
Other rock types dolostone (dolomite); sandstone; siltstone; chert
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale (Bed)
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Carbonate > Dolostone (Bed)
Minor
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Siltstone (Bed)
Sedimentary > Chemical > Chert (Bed)
Map references
Haley, B. R., Glick, E. E., Bush, W. V.; Clardy, B. F.; Stone, C. G.; Woodward, M. B., Zachry, D.L., 1993, Geologic Map of Arkansas: U.S.Geological Survey Special Geologic Map. Scale 1:500K
Unit references
Craig W. W, Wise, O, and McFarland, J. D. III,1984, A guidebook to the post-St. Peter Ordovician and the Silurian and Devonian rocks of north-central Arkansas: Guidebook - Arkansas Geological Commission, vol.84-1, 49 pp.
Counties Benton - Carroll - Independence - Izard - Lawrence - Madison - Sharp - Stone - Washington