Ordovician Formations, including Mannie Shale, Fernvale Limestone, Hermitage Formation, and Carters, Lebanon, Ridley, Pierce, and Murfreesboro Limestones

Ordovician Formations - including Mannie Shale - Shale with thin beds of argillaceous limestone. Thickness 0 to 20 feet; Fernvale Limestone - Thick-bedded, coarse-grained, gray limestone with varicolored grains. Thickness 0 to 30 feet; Hermitage Formation - Gray shale and thin-bedded to laminated, sandy and argillaceous limestone. About 200 to 300 feet thick in Wells Creek Basin; only about 80 feet exposed in Western Valley; and the Carters, Lebanon, Ridley, Pierce, and Murfreesboro Limestones - Thin- to thick-bedded, cryptograined to coarse-grained, yellowish-brown to olive-gray limestones. Thickness about 1,000 feet. (Not exposed in Western Valley.)
State Tennessee
Name Ordovician Formations, including Mannie Shale, Fernvale Limestone, Hermitage Formation, and Carters, Lebanon, Ridley, Pierce, and Murfreesboro Limestones
Geologic age Ordovician
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone
Minor
Sedimentary > Clastic > Mudstone > Shale
Comments West-Central sheet
References

Greene, D.C., and Wolfe, W.J., 2000, Superfund GIS - 1:250,000 Geology of Tennessee, USGS, (geo250k).

Hardeman, W.D., Miller, R.A., and Swingle, G.D., 1966, Geologic Map of Tennessee: Division of Geology, Tennessee Department of Environment and Conservation, 4 sheets, scale 1:250,000

NGMDB product
Counties Houston - Lewis - Perry - Stewart - Wayne