| State | Arkansas |
|---|---|
| Name | Ruddell Shale |
| Geologic age | Late Mississippian- Chesterian |
| Lithologic constituents | Major
Sedimentary > Clastic > Mudstone > Shale (Bed)
|
| Comments | Dark gray fissile clay shale with minor calcareous beds containing iron concretions. Approximatly 270 ft. maximum thickness |
| References | 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. |
| NGMDB product | |
| Counties | Baxter - Independence - Searcy - Stone |