Bigby-Cannon Limestone and Hermitage Formation

Bigby-Cannon Limestone - Dark- to light-gray, dense to medium-grained, medium- and even-bedded limestone. Thickness 80 to 150 feet; and Hermitage Formation - Gray, fine-grained, thin-bedded to laminated, sandy and argillaceous limestone; shale, weathers yellowish-brown; and nodular, shaly limestone. Thickness 50 to 100 feet.
State Tennessee
Name Bigby-Cannon Limestone and Hermitage Formation
Geologic age Ordovician
Lithologic constituents
Major
Sedimentary > Carbonate > Limestonelocally nodular
Minor
Sedimentary > Clastic > Mudstone > Shale
Comments East-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 Bledsoe - Cumberland - DeKalb - Jackson - Marion - Sequatchie - Smith