Johns Valley Shale

Johns Valley Shale
State Arkansas
Name Johns Valley Shale
Geologic age Early Pennsylvanian- Morrowan
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale (Bed)
Minor
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Carbonate > Limestone (Bed)
Incidental
Sedimentary > Clastic > Conglomerate (Bed)
Comments Mostly shale with some minor interbedded sandstone and limestone and some erratic boulders. Approximatly 1500 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 - Hot Spring - Howard - Lonoke - Montgomery - Perry - Pike - Polk - Pulaski - Scott - Sevier - Yell