Stanley Shale

Stanley Shale - Includes Chickasaw Creek Chert equivalent of Harlton (1938) near top and Hatton Tuff Lentil and Hot Springs Sandstone Member near base
State Arkansas
Name Stanley Shale
Geologic age Early Mississippian
Lithologic constituents
Major
Sedimentary > Clastic > Siltstone (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)
Minor
Sedimentary > Chemical > Chert (Bed)
Igneous > Volcanic (Pyroclastic-tuff)
Comments Black shale to slate alternating with sandstone, siltstone some chert and tuff. Approximatly 9500 ft. maximum thickness. Geosynclinal facies-composed mainly of alternating shales and sandstone including some tuffaceous beds (5600 ft.), and fossiliferous siliceous shale and graywacke.
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.

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 - Garland - Hot Spring - Howard - Montgomery - Perry - Pike - Polk - Pulaski - Saline - Scott - Sevier - Yell