| State | Arkansas |
|---|---|
| Name | Cotter and Jefferson City Dolomites |
| Geologic age | Early Ordovician |
| Lithologic constituents |
Major
Sedimentary > Carbonate > Dolostone (Bed)
Minor
Sedimentary > Chemical > Chert (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
|
| Comments | Cotter Dolomite-oolitic dolomite with thin beds of sandstone and shale (500 ft.), Jefferson City Dolomite-dolomite with some chert (400 ft.). Approximatly 900 ft. maximum thickness. |
| 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. |
| NGMDB product | |
| Counties | Baxter - Benton - Boone - Carroll - Fulton - Izard - Lawrence - Madison - Marion - Randolph - Sharp |