Jackfork Sandstone

Jackfork Sandstone
State Arkansas
Name Jackfork Sandstone
Geologic age Early Pennsylvanian- Morrowan
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Comments Sandstone with interbedded shale, some as olistolithic intervals. Approximatly 6000 ft. maximum thickness.
References

Moore, R.C., 1934, The origin and age of the boulder-bearing Johns Valley shale in the Ouachita Mountains of Arkansas and Oklahoma: American Journal of Science, vol.27, no.162, pp.432-453

Stone, C.G. and Bush, W.V. 1982, Summary of the geology of the eastern Ouachita Mountains, Arkansas: Guidebook - Arkansas Geological Commission, vol.82-2, 24 pp.

NGMDB product
Counties Clark - Faulkner - Garland - Hot Spring - Howard - Montgomery - Perry - Pike - Polk - Pulaski - Saline - Scott - Sevier - Yell