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Mineral Resources > Online Spatial Data > Geology > by state > Georgia Geology

Geologic units in Whitfield county, Georgia

[Additional scientific data in this geographic area]

Nolichucky Shale, and Maryville, Rogersville, and Rutledge Formations, and Pumpkin Valley Shale (Cambrian) at surface, covers 0.1 % of this area

(Cn) Nolichucky Shale - Pastel-colored (pink, greenish, olive), flaky clay shale; gray, commonly oolitic, shaly limestone lenses; locally stromatolitic limestone layers; thin, blocky siltstone near middle. Thickness 500 feet in the east to 900 feet in the west.; (Cmr) Maryville, Rogersville, and Rutledge Formations - Maryvile and Rutledge are gray limestone, in part oolitic, with gray dolomite locally. Rogersville is green clay shale. Thickness 400 to 1,000 feet. Pumpkin Valley Shale - Dull-brown to maroon shale with numerous interbeds of thin, blocky, sandy siltstone. Thickness 100 to 600 feet.

Lithology: shale; limestone; dolostone (dolomite); siltstone

Holston Formation (Ordovician) at surface, covers < 0.1 % of this area

Holston Formation - Pink, gray, and red coarsely crystalline limestone (Holston Marble); in many areas upper part is sandy, crossbedded ferruginous limestone and brown to greenish calcareous shale. Thickness 200 to 600 feet.

Lithology: limestone; shale

Devonian-Missisippian undivided (Devonian-Mississippian) at surface, covers 4 % of this area

Devonian-Missisippian undivided (DMu): Includes Fort Payne Chert, Chattanooga Shale in Dade Co.; Fort Payne Chert at top, Chattanooga Shale in middle and Armuchee Shale at bottom in all areas except Polk Co. and Dade Co.; Fort Payne Chert, and Armuchee Chert in Polk Co. CHATTANOOGA Shale (Dc)

Lithology: shale ; chert

Knox Group undifferentiated (Ordovician-Cambrian) at surface, covers 22 % of this area

Knox Group undifferentiated

Lithology: dolostone (dolomite); limestone

Chickamauga Group; Upper and Middle Ordovician rocks (Oum) includes Sequatchie Limestone, Murfreesboro Limestone, Ridley Limestone, Moccasin Limestone and Bays Formation. (Ordovician) at surface, covers < 0.1 % of this area

Chickamauga Group; Upper and Middle Ordovician rocks (Oum) includes Sequatchie Limestone, Murfreesboro Limestone, Ridley Limestone, Moccasin Limestone and Bays Formation.

Lithology: limestone

Knox Group, including Newala Formation, Mascot Dolomite, Kingsport Formation, Longview Dolomite, Chepultepec Dolomite, and Copper Ridge Dolomite (Ordovician to Cambrian) at surface, covers < 0.1 % of this area

Knox Group - Siliceous dolomite and magnesian limestone sequence. Thickness 2,500 to 3,000 feet.

Lithology: dolostone (dolomite); limestone

Maynardville Limestone (Cambrian) at surface, covers < 0.1 % of this area

Maynardville Limestone - Thick-bedded, bluish-gray, ribboned (silt and dolomite), nodular limestone; light-gray, fine- grained, laminated to thin-bedded, noncherty dolomite in upper part. Thickness 150 to 400 feet.

Lithology: limestone; dolostone (dolomite)

Red Mountain Formation (Silurian) at surface, covers 7 % of this area

Red Mountain Formation

Lithology: sandstone; shale

Ottosee Shale (Ordovician) at surface, covers < 0.1 % of this area

Ottosee Shale - Bluish-gray calcareous shale, weathers yellow; with reef lenses of coarsely crystalline reddish fossiliferous limestone ("marble"). Thickness about 1,000 feet.

Lithology: shale; limestone

Conasauga Group; Maynardville Limestone (Cambrian) at surface, covers 6 % of this area

Conasauga Group; Maynardville Limestone

Lithology: limestone

Copper Ridge Dolomite (Cambrian) at surface, covers < 0.1 % of this area

Copper Ridge Dolomite - Coarse, dark-gray, knotty dolomite, asphaltic in places, with much gray, medium-grained, well- bedded dolomite; abundant chert; cryptozoans typical. Thickness about 1,000 feet.

Lithology: dolostone (dolomite); chert

Unnamed (upper part of Knox Group), including Newala Formation, Mascot Dolomite, Kingsport Formation, Longview Dolomite, and Chepultepec Dolomite (Ordovician) at surface, covers < 0.1 % of this area

(Onc) Unnamed (upper part of the Knox Group), including the (On) Newala Formation; (Oma) Mascot Dolomite - Light-gray, fine-grained, well-bedded cherty dolomite; mottled (red and green) dolomite characteristic; interbeds of bluish-gray limestone in upper part; chert-matrix quartz sandstone at base. Erosional unconformity at top. Thickness 350 to 800 feet; (Ok) Kingsport Formation - Gray, fine-grained, sparingly cherty dolomite with basal dense, gray limestone sequence. Thickness about 250 feet. and (Olc) Unnamed (middle part of the Knox Group), including (Olv) Longview Dolomite - Siliceous, gray, fine-grained, medium-bedded dolomite; interbeds of gray limestone in upper part. Thickness about 300 feet; (Oc) Chepultepec Dolomite - Light-gray, fine-grained, well-bedded dolomite, moderately cherty; fine-grained limestone locally in upper part; quartz sandstone beds at base. Average thickness about 800 feet.

Lithology: dolostone (dolomite); limestone; sandstone

Chickamauga Group; Upper and Middle Ordovician Rocks (Omb) includes Moccasin Limestone and Bays Formation (Ordovician) at surface, covers 8 % of this area

Chickamauga Group; Upper and Middle Ordovician Rocks (Omb) includes Moccasin Limestone and Bays Formation.

Lithology: limestone; sandstone

Floyd Shale (Mississippian) at surface, covers 0.3 % of this area

Floyd Shale (Mfs): includes the Hartselle Sandstone Member (Mh) in Floyd County and an unnamed limestone member (Ml in Floyd County) at the base

Lithology: shale

Conasauga Group; Lower unit; shale and sandstone unit (Cambrian) at surface, covers 15 % of this area

Conasauga Group; Lower unit; shale and sandstone unit: Includes shale and sandstone unit (Ccs) with lower dolostone unit (Ccdl). Possible equivalent of Pumpkin Valley Shale of Tennessee

Lithology: shale; sandstone

Newala Limestone (Ordovician) at surface, covers 1 % of this area

Newala Limestone

Lithology: limestone

Lenoir Limestone (Ordovician) at surface, covers < 0.1 % of this area

Lenoir Limestone - Nodular, argillaceous, gray limestone; in places basal sedimentary breccia, conglomerate, quartz sand; Mosheim Limestone Member (dense, light- to medium-gray limestone) near base. Thickness 25 to 500 feet.

Lithology: limestone; conglomerate; sand

Conasauga Group; Upper unit; limestone and shale unit (Cambrian) at surface, covers 30 % of this area

Conasauga Group; Upper unit; limestone and shale unit: Includes limestone and shale unit (Ccsl). Possible equivalent of the Maryville Limestone and Nolichucky Shale of Tennessee with a dolostone member (Ccd).

Lithology: shale; limestone

Fort Payne Shale; Lavender Shale Member (Mississippian) at surface, covers 0.5 % of this area

Fort Payne Shale (Mfp) with Lavender Shale Member (Mls)

Lithology: shale

Chickamauga Group; Holston Limestone (Ordovician) at surface, covers 1 % of this area

Chickamauga Group; Holston Limestone

Lithology: limestone

Conasauga Group; Middle unit; Limestone unit (Cambrian) at surface, covers 0.4 % of this area

Conasauga Group; Middle unit; Limestone unit: Includes limestone unit (Ccls), possible equivalent of Rutledge Limestone of Tennessee and shale unit (Cc), possible equivalent of Rogersville Shale of Tennessee

Lithology: limestone

Rome Formation (Cambrian) at surface, covers 4 % of this area

Rome Formation

Lithology: sandstone; shale