Geologic units in Gordon county, Georgia

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

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

Conasauga Group; Lower unit; shale and sandstone unit (Cambrian) at surface, covers 18 % of this area

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

Knox Group undifferentiated (Ordovician-Cambrian) at surface, covers 12 % of this area

Knox Group undifferentiated

Conasauga Group; Middle unit; Limestone unit (Cambrian) at surface, covers 11 % of this area

Includes limestone unit (Ccls), possible equivalent of Rutledge Limestone of Tennessee and shale unit (Cc), possible equivalent of Rogersville Shale of Tennessee

Devonian-Missisippian undivided (Devonian-Mississippian) at surface, covers 6 % of this area

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)

Conasauga Group; Maynardville Limestone (Cambrian) at surface, covers 5 % of this area

Conasauga Group; Maynardville Limestone

Mica Schist/ Metasiltstone (Precambrian-Paleozoic) at surface, covers 5 % of this area

Mica Schist/ Metasiltstone

Floyd Shale (Mississippian) at surface, covers 4 % of this area

Includes the Hartselle Sandstone Member (Mh) in Floyd County and an unnamed limestone member (Ml in Floyd County) at the base

Rome Formation (Cambrian) at surface, covers 3 % of this area

Rome Formation

Red Mountain Formation (Silurian) at surface, covers 2 % of this area

Red Mountain Formation

Conasauga Group; Middle unit; Shale unit (Cambrian) at surface, covers 2 % of this area

Includes limestone unit (Ccls), possible equivalent of Rutledge Limestone of Tennessee and shale unit (Cc), possible equivalent of Rogersville Shale of Tennessee

Metagraywacke/ Mica Schist (Precambrian-Paleozoic) at surface, covers 1 % of this area

Metagraywacke/ Mica Schist

Phyllite and Quartzite (Precambrian-Paleozoic) at surface, covers 1 % of this area

Phyllite and Quartzite

Chickamauga Group; Upper and Middle Ordovician Rocks (Omb) includes Moccasin Limestone and Bays Formation (Ordovician) at surface, covers 0.3 % of this area

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