Cotter and Jefferson City Dolomites (AROcjc;0)

State	Arkansas
Name	Cotter and Jefferson City Dolomites
Geologic age	Phanerozoic \| Paleozoic \| Ordovician-Early
Original map label	Ocjc
Comments	Cotter Dolomite-oolitic dolomite with thin beds of sandstone and shale (500 ft.), Jefferson City Dolomite-dolomite with some chert (400 ft.). Approximately 900 ft. maximum thickness.
Primary rock type	dolostone (dolomite)
Secondary rock type	chert
Other rock types	sandstone; shale
Lithologic constituents	Major Sedimentary > Carbonate > Dolostone (Bed) Minor Sedimentary > Clastic > Mudstone > Shale (Bed) Sedimentary > Clastic > Sandstone (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	Caplan, W. M., 1960, Subsurface geology of pre-Everton rocks in northern Arkansas: Information Circular - State of Arkansas, Arkansas Geological and Conservation Commission, 17 pp.
Geographic coverage	Baxter - Benton - Boone - Carroll - Fulton - Izard - Lawrence - Madison - Marion - Randolph - Sharp