Fentress Formation

Mostly dark-gray to light-brown shale, with minor siltstone and sandstone. Wilder coal near middle. Laterally equivalent to entire Gizzard Group and all of Crab Orchard Mountains Group below Rockcastle Conglomerate. Thickness as much as 340 feet.
State Tennessee
Name Fentress Formation
Geologic age Pennsylvanian
Lithologic constituents
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Siltstone
Sedimentary > Coal
Comments East-Central sheet

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

USGS Geologic Names lexicon found at: http://ngmdb.usgs.gov/Geolex/


NGMDB product
Counties Fentress - Overton - Pickett - Scott