|Geologic age||Late Mississippian- Chesterian|
Sedimentary > Clastic > Mudstone > Shale (Bed)
|Comments||Dark gray fissile clay shale with minor calcareous beds containing iron concretions. Approximatly 270 ft. maximum thickness|
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 - Independence - Searcy - Stone|