Sequatchie Formation, Colvin Mountain Sandstone, Greensport Formation undifferentiated (ALOscmg;6)

Sequatchie Formation, Colvin Mountain Sandstone, Greensport Formation undifferentiated - variegated dusky-red and pale-yellowish-orange shale, calcareous mudstone, dolomite, siltstone, and minor sandstone. Mapped in areas of facies transition with the Chickamauga Limestone (Scraper Mountain) and in the structurally complex area at the east end of Dry Creek Mountain.

State	Alabama
Name	Sequatchie Formation, Colvin Mountain Sandstone, Greensport Formation undifferentiated
Geologic age	Ordovician
Original map label	Oscmg
Primary rock type	shale
Secondary rock type	mudstone
Other rock types	siltstone; dolostone (dolomite); sandstone; bentonite
Lithologic constituents	Minor Sedimentary > Clastic > MudstoneGreensport Formation -- calcareous mudstone Sedimentary > Carbonate > Dolostone Sedimentary > Clastic > Mudstone > Shale Sedimentary > Clastic > Siltstone Incidental Sedimentary > Clastic > Mudstone > Claystone > BentoniteColvin Mountain Sandstone - locally contains thin beds of bentonite in the upper part. Sedimentary > Clastic > Sandstone
Map references	Szabo, M. W., Osborne, E. W., Copeland, C. W. Jr., Neathery; T. L., 1988, Geologic Map of Alabama, Geological Survey of Alabama Special Map 220, scale 1:250,000. [http://www.ogb.state.al.us/ogb/ogb_gisdata/algeomap.zip]
Unit references	Szabo, M. W., Osborne, E. W., Copeland, C. W. Jr., Neathery; T. L., 1988, Geologic Map of Alabama, Geological Survey of Alabama Special Map 220, scale 1:250,000. [http://www.ogb.state.al.us/ogb/ogb_gisdata/algeomap.zip]