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Nashville Group; Bigby-Cannon Limestone and Hermitage Formation

Nashville Group - Bigby-Cannon Limestone - Brownish-gray phosphatic calcarenite and light-gray to brownish-gray, cryptograined to medium- grained, even-bedded limestone. Thickness 50 to 125 feet; and Hermitage Formation - Thin-bedded to laminated, sandy and argillaceous limestone with shale; nodular shaly limestone; coquina; and phosphatic calcarenite. Thickness 50 to 100 feet.
State Tennessee
Name Nashville Group; Bigby-Cannon Limestone and Hermitage Formation
Geologic age Ordovician
Comments West-Central sheet
Primary rock type calcarenite
Secondary rock type limestone
Other rock types shale; coquina
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone
Sedimentary > Clastic > Sandstone > Arenite > Calcarenite
Minor
Sedimentary > Clastic > Mudstone > Shale
Incidental
Sedimentary > Carbonate > Limestone > Coquina
Map references
Geology available at Tennesse Spatial Data Server which can be found at http://www.tngis.org/geology.html which links to a USGS Water Resources Division site: http://water.usgs.gov/lookup/getspatial?geo250k Tennessee Spatial Data Server site notes: Thanks goes to Jim Julian for researching this improved geology layer from the Tennessee Division of Geology. **Note** - The Tennessee Division of Geology does not endorse this coverage, stating this version is still incomplete and not fit for distribution.
Unit references
Geology available at Tennesse Spatial Data Server which can be found at http://www.tngis.org/geology.html which links to a USGS Water Resources Division site: http://water.usgs.gov/lookup/getspatial?geo250k Tennessee Spatial Data Server site notes: Thanks goes to Jim Julian for researching this improved geology layer from the Tennessee Division of Geology. **Note** - The Tennessee Division of Geology does not endorse this coverage, stating this version is still incomplete and not fit for distribution.
Hardeman, W.D., and others, 1966, Geologic map of Tennessee: Division of Geology, Tennessee Department of Environment and Conservation, scale 1:250,000
Counties Bedford - Bledsoe - Cannon - Cumberland - Davidson - DeKalb - Giles - Hickman - Jackson - Lincoln - Macon - Marion - Marshall - Maury - Moore - Rutherford - Sequatchie - Smith - Sumner - Trousdale - Williamson - Wilson