|Geologic age||Early Mississippian- Meramecian to Osagean|
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Sedimentary > Chemical > Chert (Bed)
|Comments||Mainly finely crystalline limestone with some cherty limestone and interbedded chert and minor shale. Approximatly 400 ft. maximum thickness.|
|Stratigraphic units||St. Joe Limestone member.|
Ferguson, J.G., 1920. Outlines of the geology, soils, and minerals of the State of Arkansas: Arkansas State Bureau of Mines, Manufactures and Agriculture,192 pp.
|Counties||Baxter - Benton - Boone - Carroll - Independence - Izard - Lawrence - Madison - Marion - Newton - Searcy - Sharp - Stone - Washington|