Laurel Limestone, Osgood Formation, and Brassfield Formation (TNS;8)

Laurel Limestone, Osgood Formation, and Brassfield Formation

Laurel Limestone - Dolomitic limestone, mottled yellowish-gray to yellowish-green, fine-grained. Thickness 0 to 10 feet. (Present only in Macon County); Osgood Formation - Grayish-green shale. Thickness 0 to 10 feet. (Present only in Macon County.); and Brassfield Formation - Olive-gray, fine-grained cherty limestone to the north, merging into olive-gray calcareous shale to the south. Thickness 60 to 130 feet. (Present only in Sequatchie Valley.)

State	Tennessee
Name	Laurel Limestone, Osgood Formation, and Brassfield Formation
Geologic age	Silurian
Lithologic constituents	Major Sedimentary > Carbonate > Limestonelocally dolomitic 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	NGMDB product page for 91768
Counties	Bledsoe - Cumberland - Macon - Marion - Sequatchie

Laurel Limestone, Osgood Formation, and Brassfield Formation

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