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

Geologic units in Polk county, Georgia

[Additional scientific data in this geographic area]

Shady Dolomite (Cambrian) at surface, covers 0.2 % of this area

Shady Dolomite

Lithology: dolostone (dolomite)

Armuchee Chert (Devonian) at surface, covers < 0.1 % of this area

Armuchee Chert

Lithology: chert

Floyd Shale (Mississippian) at surface, covers 0.5 % 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 Formation (Cambrian) at surface, covers < 0.1 % of this area

Conasauga Formation - Medium-bluish-gray fine-grained, thin-bedded argillaceous limestone and interbedded dark-gray shale in varying proportions.

Lithology: limestone; shale

Newala Limestone (Ordovician) at surface, covers 19 % of this area

Newala Limestone

Lithology: limestone

Conasauga Group; Lower unit; shale and sandstone unit (Cambrian) at surface, covers < 0.1 % 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

Chickamauga Group; Middle Ordovician rocks; Rockmart Slate (Middle Ordovician) at surface, covers 15 % of this area

Chickamauga Group; Middle Ordovician rocks; Rockmart Slate

Lithology: slate

Rome Formation (Cambrian) at surface, covers 0.2 % of this area

Rome Formation

Lithology: sandstone; shale

Knox Group undifferentiated (Ordovician-Cambrian) at surface, covers 45 % of this area

Knox Group undifferentiated

Lithology: dolostone (dolomite); limestone

Conasauga Group; Middle unit; Shale unit (Cambrian) at surface, covers 1 % of this area

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

Lithology: shale; limestone

Phyllite and Quartzite (Precambrian-Paleozoic) at surface, covers 15 % of this area

Phyllite and Quartzite

Lithology: phyllite; quartzite

Knox Group undifferentiated (Ordovician-Cambrian) at surface, covers < 0.1 % of this area

Knox Group undifferentiated - Light-gray to light-brown locally sandy dolomite, dolomitic limestone, and limestone; characterized by abundant light-colored chert.

Lithology: dolostone (dolomite); limestone; chert

Conasauga Group; Upper unit; Dolostone member (Cambrian) at surface, covers 0.8 % of this area

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

Lithology: dolostone (dolomite)

Chickamauga Group; Middle Ordovician rocks; Lenoir Limestone (Middle Ordovician) at surface, covers 0.2 % of this area

Chickamauga Group; Middle Ordovician rocks; Lenoir Limestone

Lithology: limestone

Frog Mountain (Devonian) at surface, covers 2 % of this area

Frog Mountain

Lithology: sandstone

Fort Payne Chert (Mississippian) at surface, covers 2 % of this area

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

Lithology: chert