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Geologic units in Georgia (state in United States)

[Additional scientific data in this geographic area]

Beaverdam Amphibolite (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area
Beaverdam Amphibolite - dark-green to dark-gray hornblende amphibolite, extensively sheared and folded, and locally retrograded to actinolite-tremolite-chlorite schist. Includes all amphibolite associated with the Wedowee Group.
Lithology: amphibolite; schist
Mylonitic and Cataclastic Rocks in the Brevard, Towaliga, and Goat Rock Fault Zones (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area
Mylonitic and Cataclastic Rocks in the Brevard, Towaliga, and Goat Rock Fault Zones - blastomylonite, mylonite gneiss, locally includes mylonite schist and mylonite quartzite in Towaliga fault zone.
Lithology: mylonite; gneiss; schist; quartzite
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
Rome Formation (Cambrian) at surface, covers < 0.1 % of this area
Rome Formation - variegated thinly interbedded mudstone, shale, siltstone, and sandstone; limestone and dolomite occur locally. Quartzose sandstone commonly present near top of formation.
Lithology: mudstone; shale; siltstone; sandstone; limestone; dolostone (dolomite)
Dadeville Complex; Mafic and ultramafic rock (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area
Mafic and ultramafic rock - ultramafic rock including enstatite pyroxenite, layered actinolite-tremolite amphibolite altered locally to serpentine, anthophyllite, and talc; metanorite; metagabbro; hornblendite; garnet-hornblendite, and massive amphibolite.
Lithology: pyroxenite; amphibolite; hornblendite
Dadeville Complex; Ropes Creek Amphibolite (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area
Ropes Creek Amphibolite - layered and massive amphibolite; locally includes hornblende migmatite and ultramafic pods.
Lithology: amphibolite; migmatite; ultramafic intrusive rock
Dadeville Complex; Rock Mills Granite Gneiss (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area
Rock Mills Granite Gneiss - coarse to medium-grained biotite granite gneiss; locally includes thick bands of epidote and thin, small amphibolite bodies. Boundary between Rock Mills Granite Gneiss and Camp Hill Granite Gneiss arbitrarily defined.
Lithology: granitic gneiss; amphibolite
Talladega Group; No name on map (Silurian?-Devonian) at surface, covers < 0.1 % of this area
No name on map - fossiliferous chert facies in vicinity of Jemison, Chilton County, contains marine invertabrate fossils of early to Middle Devonian age.
Lithology: chert
Dadeville Complex; Waresville Schist (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area
Waresville Schist - banded amphibolite interlayered with chlorite schist, chlorite amphibolite, chlorite-actinolite schist, chlorite +/- magnetite quartzite, and actinolite quartzite; may include small ultramafic pods.
Lithology: amphibolite; schist; quartzite; ultramfic intrusive rock
Emuckfaw Group; Glenloch Schist (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area
Glenloch Schist - graphite-garnet-muscovite schist with interlayered metagraywacke.
Lithology: mica schist; metasedimentary rock
Claiborne Group; Gosport Sand and Lisbon Formation undifferentiated in part (Eocene) at surface, covers < 0.1 % of this area
Lisbon Formation undifferentiated in part - (Claiborne Group), greenish-gray calcareous, glauconitic, fossiliferous clayey sand; marl; carbonaceous sand; carbonaceous silty clay; and coarse glauconitic, fossiliferous, quartz sand.
Lithology: sand; clay or mud;
Alluvial, coastal and low terrace deposits (Holocene) at surface, covers < 0.1 % of this area
Alluvial, coastal and low terrace deposits - Varicolored fine to coarse quartz sand containing clay lenses and gravel in places. Gravel composed of quartz and chert pebbles and assorted metmorphic and igneous rock fragments in streams near the Piedmont. In areas of the Valley and Ridge province gravel composed of angular to subrounded chert, quartz, and quartzite pebbles. Coastal deposits include fine to medium quartz sand with shell fragments and accessory heavy minerals along Gulf beaches and fine to medium quartz sand, silt, clay, peat, mud and ooze in the Mississippi Sound, Little Lagoon, bays, lakes, streams, and estuaries.
Lithology: beach sand; alluvium
Jacksons Gap Group; Jacksons Gap Group undifferentiated in part (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area
Jacksons Gap Group undivided - principally graphitic sericite (muscovite)-quartz schist; includes sericite-quartz phyllonite; sericite phyllonite, blastomylonite, porphyroclastic blastomylonite schist, and mylonite quartzite occur principally along margins in south and form most of unit northeast of Jacksons Gap, Tallapoosa County.
Lithology: schist; phyllonite; mylonite; quartzite
Selma Group; Providence Sand (Cretaceous) at surface, covers < 0.1 % of this area
Providence Sand - (Selma Group), Upper part consists of cross-bedded fine to coarse sand and white, dark-gray and pale-red-purple mottled clay containing lignite, sand, and kaolin; lower part consists of dark-gray laminated to thin-bedded silty clay and abundantly micaceous, carbonaceous, fossiliferous very fine to fine sand. The Providence Sand extends eastward from southeastern Lowndes County into Georgia.
Lithology: sand; clay or mud; silt; coal
Selma Group; Ripley Formation (Cretaceous) at surface, covers < 0.1 % of this area
Ripley Formation - (Selma Group), Light-gray to pale-olive massive, micaceous, glauconitic, fossiliferous fine sand; sandy calcareous clay; and thin indurated beds of fossiliferous sandstone.
Lithology: sand; clay or mud; sandstone
Selma Group; Cusseta Sand Member of the Ripley Formation (Cretaceous) at surface, covers < 0.1 % of this area
Cusseta Sand Member of the Ripley Formation - (Selma Group), Cross-bedded, medium to coarse sand; glauconitic, fossiliferous fine sand; and dark-gray fossiliferous, micaceous, carbonaceous clay. The member occurs at the base of the Ripley Formation and extends from Georgia westward into Montgomery County where it merges with the Demopolis Chalk.
Lithology: sand; clay or mud
Bangor Limestone (Mississippian) at surface, covers < 0.1 % of this area
Bangor Limestone - Medium-gray bioclastic and oolitic limestone, containing interbeds of dusky-red and olive-green mudstone in the upper part.
Lithology: limestone; mudstone
Bangor and Monteagle Limestones undivided in part (Mississippian) at surface, covers < 0.1 % of this area
Bangor and Monteagle Limestones undivided in part - Bangor Limestone -- medium-gray bioclastic and oolitic limestone, containing interbeds of dusky-red and olive-green mudstone in upper part. Monteagle Limestone -- light-gray oolitic limestone containing interbedded argillaceous, bioclastic, or dolomitic limestone, dolomite, and medium-gray shale.
Lithology: limestone; mudstone; dolostone (dolomite); shale
Floyd Shale (Mississippian) at surface, covers < 0.1 % of this area
Floyd Shale - Dark-gray shale, sideritic in part; thin beds of sandstone, limestone and chert are locally present; beds of partly bioclastic, partly argillaceous limestone are abundant in parts of Calhoun and Cherokee Counties.
Lithology: shale; sandstone; limestone; chert
Motts Gneiss (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area
Motts Gneiss - leucocratic quartz-rich quartz diorite pencil gneiss.
Lithology: felsic gneiss
Motts Gneiss, Unnamed unit (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area
Motts Gneiss, Unnamed unit - unnamed unit comprised of masses of epidote-hornblende-oligoclase mylonitic gneiss and amphibolite.
Lithology: gneiss; amphibolite
Monteagle Limestone (Mississippian) at surface, covers < 0.1 % of this area
Monteagle Limestone - Light-gray oolitic limestone containing interbedded argillaceous, bioclastic, or dolomitic limestone, dolomite, and medium-gray shale.
Lithology: limestone; dolostone (dolomite); shale
Tuscumbia Limestone and Fort Payne Chert undivided (Mississippian) at surface, covers < 0.1 % of this area
Tuscumbia Limestone and Fort Payne Chert undivided - Tuscumbia Limestone -- light-gray partly oolitic limestone; very coarse bioclastic crinoidal limestone common; light-gray chert nodules and concretions locally abundant. Fort Payne Chert -- very light to light-olive-gray, thin to thick-bedded fine to coarse-grained bioclastic (abundant pelmatozoans) limestone containing abundant nodules, lenses and beds of light to dark-grey chert. Upper part of formation locally consists of light-bluish-gray laminated siltstone containing vugs lined or filled with quartz and scattered throughout the formation are interbeds of medium to greenish-gray shale, shaly limestone and siltstone. Lenses of dark-gray siliceous shale occur locally at the base of the Fort Payne in Wills Valley. Commonly present below the Fort Payne is a ligh-olive-gray claystone or shale (Maury Formation) which is mapped with the Fort Payne. The Tuscumbia and Fort Payne are undifferentiated in Murphrees and Wills Valleys.
Lithology: limestone; chert; siltstone; shale; claystone
Mylonitic and Cataclastic Rocks in the Brevard, Towaliga, and Goat Rock Fault Zones (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area
Mylonitic and Cataclastic Rocks in the Brevard, Towaliga, and Goat Rock Fault Zones - mylonite and blastomylonite; contains minor ultramylonite, mylonite schist, and mylonite gneiss.
Lithology: mylonite; schist; gneiss
Chickamauga Limestone (Ordovician) at surface, covers < 0.1 % of this area
Chickamauga Limestone - Medium to dark-gray thick to thin-bedded partly argillaceous, locally fossiliferous limestone. Restricted to the western part of the Valley and Ridge province and Murphrees Valley and Wills Valley anticlines. Locally includes a thin interval of Attalla Chert Conglomerate Member at base. Attalla Chert Conglomerate - conglomerate of pebbles, cobbles, and boulders of chert and rare dolomite and quartzite in a sand-sized matrix; thin beds of gray-green or dusky-red shale common at base.
Lithology: limestone; conglomerate; chert; shale; dolostone (dolomite); quartzite
Attalla Chert Conglomerate Member of the Chickamauga Limestone (Ordovician) at surface, covers < 0.1 % of this area
Attalla Chert Conglomerate Member of the Chickamauga Limestone - conglomerate of pebbles, cobbles, and boulders of chert and rare dolomite and quartzite in a sand-sized chert and quartz matrix; thin beds of gray-green or dusky-red shale common at base.
Lithology: conglomerate; chert; shale; dolostone (dolomite); 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
Opelika Complex; Loachapoka Schist (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area
Loachapoka Schist - muscovite-quartz schist; locally contains biotite-garnet-muscovite schist, many layers conatin sillimanite (northeast of Mount Jefferson, Lee County); kyanite (west of Mount Jefferson); locally muscovite-rich schist and quartzite common.
Lithology: mica schist; quartzite
Little Oak and Lenoir Limestones undifferentiated (Ordovician) at surface, covers < 0.1 % of this area
Little Oak and Lenoir Limestones undifferentiated - dark-gray argillaceous, fossiliferous medium to thick-bedded limestone; locally contains rare chert in upper part and an interval of fenestral mudstone in lower part (Mosheim Limestone Member of the Lenoir Limestone). Between Siluria and Pelham in Shelby County, the Little Oak and Lenoir Limestones are separated by a tongue of the Athens Shale.
Lithology: limestone; mudstone; chert
Sequatchie Formation (Ordovician) at surface, covers < 0.1 % of this area
Sequatchie Formation - Grayish-red, grayish-green, and yellowish-gray thin-bedded calcareous shale and calcareous mudstone containing interbedded fossiliferous limestone, and medium-gray to moderate-red partly sandy and glauconitic, medium to coarse-grained bioclastic limestone.
Lithology: shale; mudstone; limestone
Sequatchie Formation, Colvin Mountain Sandstone, Greensport Formation undifferentiated (Ordovician) at surface, covers < 0.1 % of this area
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 (Canoe Creek, Dunaway, and Hensley Mountains).
Lithology: shale; mudstone; dolostone (dolomite); siltstone; sandstone
Pottsville Formation (Pennsylvanian) at surface, covers < 0.1 % of this area
Pottsville Formation - Light-gray thin to thick-bedded quartzose sandstone and conglomerate containing interbedded dark-gray shale, siltstone, and coal. Mapped on Lookout Mountain, Blount and Chandler Mountains, and Sand Mountain northeats of Blount County, and on the mountains of Jackson, Marshall and Madison Counties north and west of the TN river.
Lithology: sandstone; conglomerate; shale; siltstone; coal
Pine Mountain Group; Manchester Schist (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area
Manchester Schist - interlayered muscovite-quartz schist and quartzite, locally contains garnet, sillimanite and graphite; commonly intensely shared.
Lithology: schist; quartzite
Midway Group; Clayton Formation (Paleocene) at surface, covers < 0.1 % of this area
Clayton Formation - (Midway Group), White to yellowsih-gray argillaceous limestone occurs in the upper part (McBryde Limestone Member): the lower part is medium-gray fossiliferous calcareous silt, glauconitic sand and thin beds of sandy limestone and calcareous sandstone (Pine Barren Member). At the base of the formation in southeast AL is a gravelly medium to coarse sand containing clay pebbles. The formation thins west of Wilcox County and westward from Thomaston in eastern Marengo County is mapped with the Porters Creek Formation. The formation is generally deeply weathered and fresh exposures are rare. In western areas exposures consist of weathered white to yellowish-gray argillaceous, fossiliferous sandy limestone, ferruginous sand, and fossiliferous sandstone. In eastern areas exposures consist of residual accumulations of chert boulders, moderate-reddish-orange sand, and clay containing masses and thin layers of iron minerals (limonite-goethite).
Lithology: limestone; clay or mud; silt; sandstone; chert
Wilcox Group; Tuscahoma Sand (Paleocene) at surface, covers < 0.1 % of this area
Tuscahoma Sand - (Wilcox Group), Light-gray to light-olive-gray laminated and thin-bedded carbonaceous silt and clay interbedded with fine sand; thin lignite beds occur locally. Lower part of the formation includes beds of fossiliferous, glauconitic fine quartz sand containing speroidal sandstone concretions, gravel and clay pebbles.
Lithology: clay or mud; silt; sand; coal; sandstone; gravel
High terrace deposits (Pleistocene) at surface, covers < 0.1 % of this area
High terrace deposits - Varicolored lenticular beds of poorly sorted sand, ferruginous sand, silt, clay, and gravelly sand. Sand consists primarily of very fine to very coarse poorly sorted quartz grains; gravel composed of quartz, quartzite, and chert pebbles.
Lithology: terrace
Red Mountain Formation (Silurian) at surface, covers < 0.1 % of this area
Red Mountain Formation - Interbedded yellowish-gray to moderate-red sandstone, siltstone and shale; greenish-gray to moderate-red fossiliferous partly silty and sandy limestone; few thin hematitic beds.
Lithology: sandstone; shale; siltstone; limestone
Talladega Group; Lay Dam Formation (Silurian?-Devonian) at surface, covers < 0.1 % of this area
Lay Dam Formation (Talladega Group) - interbedded dark-green phyllite, medium-gray to light-brown and black metasiltstone, dark-green feldspathic metagraywacke, and light-gray and dark-gray medium to coarse-grained arkosic quartzite and metaconglomerate; graphitic phyllite common in upper part. In Cleburne and Calhoun Counties, rocks mapped as the Lay Dam include the Abel Gap Formation of Bearce (1973) and consist of interbedded greenish-gray metasiltstone and quartzite, black phyllitic metasiltstone, medium-gray to greenish-gray arkosic quartzite, and dark-gray pyritic quartzite. In Clay Chounty the upper part of the Lay Dam includes black graphitic sericite phyllite and slate reportedly containing plant fossils (Erin Slate Member).
Lithology: phyllite; metasedimentary rock; quartzite; slate; meta-conglomerate
Wedowee Group; Wedowee Group undifferentiated (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area
Wedowee Group undifferentiated - Wedowee Group undifferentiated includes the Cragford Phyllite and Cutnose Gneiss. Cragford Phyllite -- interbedded fine-grained graphite-chlorite-sericite schist and phyllite, garnet-sericite schist and phyllite, graphite-quartz-sericite phyllite, locally feldspathic biotite gneiss, calc-silicate rock, and quartzite. Cutnose Gneiss -- cyclically interbedded fine-grained quartz-biotite feldspathic gneiss, graphite-chlorite-sericite schist, locally thin interbeds of graphite-quartz-sericite phyllite, and quartzite. Rocks in the area northeast of Clanton in Chilton and Coosa Counties that are here assigned to the Wedowee Group also have been interpreted as part of the Higgins Ferry Group.
Lithology: schist; phyllite; felsic gneiss; quartzite; calc-silicate rock
Hawthorn Group, Statenville Formation (Miocene) at surface, covers < 0.1 % of this area
Hawthorn Group, Statenville Formation - The Statenville Formation occurs at or near the surface in a limited area of Hamilton, Columbia and Baker Counties on the northeastern flank of the Ocala Platform. The formation consists of interbedded sands, clays and dolostones with common to very abundant phosphate grains. The sands predominate and are light gray to light olive gray, poorly indurated, phosphatic, fine to coarse grained with scattered gravel and with minor occurrences of fossils. Clays are yellowish gray to olive gray, poorly consolidated, variably sandy and phosphatic, and variably dolomitic. The dolostones, which occur as thin beds, are yellowish gray to light orange, poorly to well indurated, sandy, clayey and phosphatic with scattered mollusk molds and casts. Phosphate occurs in the Statenville Formation in economically important amounts. Silicified fossils and opalized claystones are found in the Statenville Formation. Permeability of these sediments is generally low, forming part of the intermediate confining unit/aquifer system.
Lithology: sandstone; clay or mud; dolostone (dolomite)
Hawthorn Group, Torreya Formation (Miocene) at surface, covers < 0.1 % of this area
Hawthorn Group, Torreya Formation - Torreya Formation - The Torreya Formation is exposed or near the surface from western Gadsden County eastward to western-most Hamilton County. It is informally subdivided into a lower carbonate unit and an upper siliciclastic unit (Scott, 1988). The majority of Torreya Formation outcrops expose the siliciclastic part of the unit. The carbonate sediments are white to light olive gray, generally poorly indurated, variably sandy and clayey, fossiliferous (molds and casts) limestone (mudstone and wackestone). The limestones often grade into calcareous-cemented sands. Phosphate is present in the carbonate sediments, particularly in the Sopchoppy Member. The siliciclastics vary from white to light olive gray, unconsolidated to poorly indurated, slightly clayey sands with minor phosphate to light gray to bluish gray, poorly consolidated, variably silty clay (Dogtown Member). The siliciclastics are sporadically fossiliferous. The Torreya Formation overlies the FAS and forms part of the intermediate confining unit/aquifer system.
Lithology: limestone; sandstone; clay or mud; silt
Suwannee Limestone (Oligocene) at surface, covers < 0.1 % of this area
Suwannee Limestone - Peninsular Lower Oligocene carbonates crop out on the northwestern, northeastern and southwestern flanks of the Ocala Platform. The Suwannee Limestone is absent from the eastern side of the Ocala Platform due to erosion, nondeposition or both, an area referred to as Orange Island (Bryan, 1991). The Suwannee Limestone, originally named by Cooke and Mansfield (1936), consists of a white to cream, poorly to well indurated, fossiliferous, vuggy to moldic limestone (grainstone and packstone). The dolomitized parts of the Suwannee Limestone are gray, tan, light brown to moderate brown, moderately to well indurated, finely to coarsely crystalline, dolostone with limited occurrences of fossiliferous (molds and casts) beds. Silicified limestone is common in Suwannee Limestone. Fossils present in the Suwannee Limestone include mollusks, foraminifers, corals and echinoids.
Lithology: limestone; dolostone (dolomite)
Citronelle Formation (Pliocene) at surface, covers < 0.1 % of this area
Citronelle Formation - The Citronelle Formation is widespread in the Gulf Coastal Plain. The type section for the Citronelle Formation, named by Matson (1916), is near Citronelle, Alabama. The Citronelle Formation grades laterally, through a broad facies transition, into the Miccosukee Formation of the eastern Florida panhandle. Coe (1979) investigated the Citronelle Formation in portions of the western Florida panhandle. The Citronelle Formation is a siliciclastic, deltaic deposit that is lithologically similar to, and time equivalent with, the Cypresshead Formation and, at least in part, the Long Key Formation (Cunningham et al., 1998) of the peninsula. In the western panhandle, some of the sediments mapped as Citronelle Formation may be reworked Citronelle. The lithologies are the same and there are few fossils present to document a possible younger age. The Citronelle Formation consists of gray to orange, often mottled, unconsolidated to poorly consolidated, very fine to very coarse, poorly sorted, clean to clayey sands. It contains significant amounts of clay, silt and gravel which may occur as beds and lenses and may vary considerably over short distances. Limonite nodules and limonite-cemented beds are common. Marine fossils are rare but fossil pollen, plant remains and occasional vertebrates are found. Much of the Citronelle Formation is highly permeable. It forms the Sand and Gravel Aquifer of the surficial aquifer system.
Lithology: delta; sand; clay or mud; silt; gravel
Miccosukee Formation (Pliocene) at surface, covers < 0.1 % of this area
Miccosukee Formation - The Miccosukee Formation, named by Hendry and Yon (1967), is a siliciclastic unit with a limited distribution in the eastern panhandle. It occurs in the Tallahassee Hills from central Gadsden County to eastern Madison County, often capping hills. The Miccosukee Formation grades to the west, through a broad facies transition, in central Gadsden County into the Citronelle Formation. The Miccosukee Formation is a prodeltaic deposit. The Miccosukee Formation is composed of grayish orange to grayish red, mottled, poorly to moderately consolidated, interbedded clay, sand and gravel of varying coarseness and admixtures (Hendry and Yon, 1967). The unit is relatively impermeable but is considered a part of the surficial aquifer system (Southeastern Geological Society, 1986).
Lithology: clay or mud; sand; gravel
Undifferentiated sediments (Pliocene/Pleistocene) at surface, covers < 0.1 % of this area
Undifferentiated sediments - Undifferentiated Tertiary-Quaternary Sediments - These sediments are siliciclastics that are separated from undifferentiated Quaternary sediments solely on the basis of elevation. Based on the suggestion that the Pleistocene sea levels reached a maximum of approximately 100 feet (30 meters) msl (Colquhoun, 1969), these sediments, which occur above 100 feet (30 meters) msl, are predominantly older than Pleistocene but contain some sediments reworked during the Pleistocene. This unit may include fluvial and aeolian deposits. The undifferentiated Tertiary-Quaternary sediments occur in a band extending from the Georgia-Florida state line in Baker and Columbia Counties southward to Alachua County. These sediments are gray to blue green, unconsolidated to poorly consolidated, fine to coarse grained, clean to clayey, unfossiliferous sands, sandy clays and clays. Organic debris and disseminated organics are present in these sediments. The undifferentiated Tertiary-Quaternary sediments are part of the surficial aquifer system.
Lithology: sand; clay or mud; peat
Biotite Gneiss (Precambrian-Paleozoic) at surface, covers 1 % of this area
Biotite gneiss
Lithology: biotite gneiss
Biotite Gneiss/ Amphibolite (Age not given) at surface, covers 0.2 % of this area
Biotite Gneiss/ Amphibolite
Lithology: biotite gneiss; amphibolite
Biotite Gneiss/ Hornblende Gneiss/ Granite Gneiss (Age not given) at surface, covers < 0.1 % of this area
Biotite Gneiss/ Hornblende Gneiss/ Granite Gneiss
Lithology: biotite gneiss; mafic gneiss; granitic gneiss
Biotite Gneiss/ Mica Schist (Age not given) at surface, covers < 0.1 % of this area
Biotite Gneiss/ Mica Schist
Lithology: biotite gneiss; mica schist
Mylonite and ultramylonite (Age not given) at surface, covers 0.1 % of this area
Mylonite and ultramylonite
Lithology: mylonite
Flinty Crush Rock (Age not given) at surface, covers < 0.1 % of this area
Flinty Crush Rock
Lithology: mylonite
Conasauga Group; Middle unit; Shale unit (Cambrian) at surface, covers 0.1 % 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
Conasauga Group; Upper unit; Dolostone member (Cambrian) at surface, covers < 0.1 % 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)
Conasauga Group; Lower unit; lower dolostone unit (Cambrian) at surface, covers < 0.1 % of this area
Conasauga Group; Lower unit; lower dolostone unit: Includes shale and sandstone unit (Ccs) with lower dolostone unit (Ccdl). Possible equivalent of Pumpkin Valley Shale of Tennessee
Lithology: dolostone (dolomite)
Chilhowee Formation (Cambrian) at surface, covers < 0.1 % of this area
Chilhowee Formation, includes Weisner Formation of Kesler, 1950
Lithology: sandstone; shale; conglomerate
Conasauga Group; Middle unit; Limestone unit (Cambrian) at surface, covers < 0.1 % 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
Conasauga Group; Maynardville Limestone (Cambrian) at surface, covers < 0.1 % of this area
Conasauga Group; Maynardville Limestone
Lithology: limestone
Copper Ridge Dolomite (Cambrian) at surface, covers < 0.1 % of this area
Copper Ridge Dolomite
Lithology: dolostone (dolomite)
Conasauga Group; Lower unit; shale and sandstone unit (Cambrian) at surface, covers 0.3 % 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
Conasauga Group; Upper unit; limestone and shale unit (Cambrian) at surface, covers 0.3 % 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
Rome Formation (Cambrian) at surface, covers 0.2 % of this area
Rome Formation
Lithology: sandstone; shale
Shady Dolomite (Cambrian) at surface, covers < 0.1 % of this area
Shady Dolomite
Lithology: dolostone (dolomite)
Armuchee Chert (Devonian) at surface, covers < 0.1 % of this area
Armuchee Chert
Lithology: chert
Frog Mountain (Devonian) at surface, covers < 0.1 % of this area
Frog Mountain
Lithology: sandstone
Devonian-Missisippian undivided (Devonian-Mississippian) at surface, covers < 0.1 % 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
Claiborne undifferentiated (Eocene) at surface, covers 0.2 % of this area
Claiborne undifferentiated, up-dip equivalent of Lisbon and Tallahatta Formations
Lithology: sandstone; clay or mud; carbonate
Clinchfield Sand (Eocene) at surface, covers < 0.1 % of this area
Clinchfield Sand
Lithology: sand
Cooper Marl (Eocene) at surface, covers < 0.1 % of this area
"Cooper Marl" (Ecm). It is now recognized that this unit is not the precise lithologic or biostratigraphic equivalent of type Cooper Marl (Huddlestun, Marsalis & Pickering, 1974).
Lithology: clay or mud
Irwinton Sand (Eocene) at surface, covers 1 % of this area
Irwinton Sand (Ei), up-dip equivalent of Twiggs Clay, Sandersville Limestone, and Cooper Marl. As mapped, also includes younger clastics of indefinite Late Tertiary age.
Lithology: sand
Lisbon Formation (Eocene) at surface, covers < 0.1 % of this area
Lisbon Formation
Lithology: sand
McBean Formation (Eocene) at surface, covers < 0.1 % of this area
McBean Formation
Lithology: clay or mud
Ocala Limestone (Eocene) at surface, covers 3 % of this area
Ocala Limestone, generally covered with Oligocene and Eocene residuum (Flint River Formation of Cooke, 1939); includes up-dip area, Tivola Limestone of Connell (1955). (*)- outcrops of Ocala Limestone on Dougherty Plain.
Lithology: limestone
Eocene and Oligocene Residuum, undifferentiated (Eocene-Oligocene) at surface, covers < 0.1 % of this area
Eocene and Oligocene Residuum, undifferentiated
Lithology: sand; clay or mud
Sandersville Limestone (Eocene) at surface, covers < 0.1 % of this area
Sandersville Limestone (Es)
Lithology: limestone
Tallahatta Formation (Eocene) at surface, covers < 0.1 % of this area
Tallahatta Formation
Lithology: limestone; sand; clay or mud
Twiggs Clay (Eocene) at surface, covers 0.5 % of this area
Twiggs Clay
Lithology: clay or mud
Eocene undifferentiated (Eocene) at surface, covers < 0.1 % of this area
Eocene undifferentiated, highly weathered sands and sandy clays of lower Tertiary age
Lithology: sand; clay or mud
Biotite Gneiss/ Feldspathic Biotite Gneiss (Precambrian-Paleozoic) at surface, covers 0.9 % of this area
Biotite Gneiss/ Feldspathic Biotite Gneiss
Lithology: biotite gneiss; felsic gneiss
Biotite Granite Gneiss/ Feldspathic Biotite Gneiss/ Amphibolite Hornblende Gneiss (Precambrian-Paleozoic) at surface, covers 1.0 % of this area
Biotite Granite Gneiss/ Feldspathic Biotite Gneiss/ Amphibolite Hornblende Gneiss
Lithology: granitic gneiss; biotite gneiss; amphibolite
Biotitic Gneiss Undifferentiated (Precambrian-Paleozoic) at surface, covers 0.2 % of this area
Biotitic Gneiss Undifferentiated
Lithology: biotite gneiss
Biotitic Gneiss / Mica Schist/ Amphibolite (Precambrian-Paleozoic) at surface, covers 2 % of this area
Biotitic Gneiss / Mica Schist/ Amphibolite
Lithology: biotite gneiss; mica schist; amphibolite
Biotitic Gneiss / Amphibolite (Precambrian-Paleozoic) at surface, covers 0.1 % of this area
Biotitic Gneiss / Amphibolite
Lithology: biotite gneiss; amphibolite
Granitic Gneiss undifferentiated (Precambrian-Paleozoic) at surface, covers 2 % of this area
Granitic Gneiss undifferentiated
Lithology: granitic gneiss
Granitic Gneiss / Gneissic Granite (augen or porphyritic) (Precambrian-Paleozoic) at surface, covers 0.3 % of this area
Granitic Gneiss / Gneissic Granite (augen or porphyritic)
Lithology: granitic gneiss; granite
Muscovite Granite Gneiss (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Muscovite Granite Gneiss
Lithology: granitic gneiss
Granite Gneiss/ Amphibolite (Precambrian-Paleozoic) at surface, covers 0.8 % of this area
Granite Gneiss/ Amphibolite
Lithology: granitic gneiss; amphibolite
Calc-silicate Granite Gneiss (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Calc-silicate Granite Gneiss
Lithology: granitic gneiss
Granite Gneiss/ Granite (Precambrian-Paleozoic) at surface, covers 0.3 % of this area
Granite Gneiss/ Granite
Lithology: granitic gneiss; granite
Granite undifferentiated (Precambrian-Paleozoic) at surface, covers 0.8 % of this area
Granite undifferentiated
Lithology: granite
Non-porphyritic granite (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Non-porphyritic granite
Lithology: granite
Porphyritic granite (Precambrian-Paleozoic) at surface, covers 0.5 % of this area
Porphyritic granite
Lithology: granite
Granite/ granite gneiss (Precambrian-Paleozoic) at surface, covers 0.1 % of this area
Granite/ granite gneiss
Lithology: granite; granitic gneiss
Granite/ gneissic biotite granite (Precambrian-Paleozoic) at surface, covers 0.6 % of this area
Granite/ gneissic biotite granite
Lithology: granite
Granite/ biotite granite/ amphibolite (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Granite/ biotite granite/ amphibolite
Lithology: granite; amphibolite
Charnockite (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Charnockite
Lithology: charnockite
Syenite (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Syenite
Lithology: syenite
Blufftown Formation (Cretaceous) at surface, covers < 0.1 % of this area
Blufftown Formation
Lithology: clay or mud; sand
Cusseta Sand (Cretaceous) at surface, covers 0.2 % of this area
Cusseta Sand
Lithology: sand; clay or mud; siltstone
Cusseta, Blufftown, and Eutaw Formations, undifferentiated (Cretaceous) at surface, covers 0.1 % of this area
Cusseta, Blufftown, and Eutaw Formations, undifferentiated
Lithology: sand; clay or mud
Eutaw Formation (Cretaceous) at surface, covers < 0.1 % of this area
Eutaw Formation
Lithology: clay or mud; sand
Providence Sand (Cretaceous) at surface, covers 0.2 % of this area
Providence Sand, includes Perote Member
Lithology: sand
Ripley Formation (Cretaceous) at surface, covers 0.1 % of this area
Ripley Formation
Lithology: clay or mud; sand; limestone
Tuscaloosa Formation (Cretaceous) at surface, covers 0.4 % of this area
Tuscaloosa Formation
Lithology: sand; clay or mud; gravel
Marble (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Marble
Lithology: marble
Calcareous mica schist/ Micaceous marble/ Mica schist (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Calcareous mica schist/ Micaceous marble/ Mica schist
Lithology: mica schist; marble
Bangor Limestone (Mississippian) at surface, covers < 0.1 % of this area
Bangor Limestone
Lithology: limestone
Fort Payne Chert (Mississippian) at surface, covers < 0.1 % of this area
Fort Payne Chert (Mfp) with Lavender Shale Member (Mls)
Lithology: chert
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
Floyd Shale; Hartselle Sandstone member (Mississippian) at surface, covers 0.5 % of this area
Hartselle Sandstone member (Mh) in Floyd County
Lithology: sandstone
Floyd Shale; unnamed limestone member (Mississippian) at surface, covers < 0.1 % of this area
Floyd Shale; unnamed limestone member (Ml in Floyd County) at the base
Lithology: shale; limestone
Fort Payne Shale; Lavender Shale Member (Mississippian) at surface, covers < 0.1 % of this area
Fort Payne Shale (Mfp) with Lavender Shale Member (Mls)
Lithology: shale
Amphibolite/ Metagraywacke/ Mica Schist (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Amphibolite/ Metagraywacke/ Mica Schist
Lithology: amphibolite; graywacke; schist
Mafic Hornfels (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Mafic Hornfels
Lithology: hornfels
Amphibolite (Precambrian-Paleozoic) at surface, covers 0.1 % of this area
Amphibolite
Lithology: amphibolite
Hornblende Gneiss (Precambrian-Paleozoic) at surface, covers 0.2 % of this area
Hornblende Gneiss
Lithology: gneiss
Hornblende Gneiss/ Amphibolite (Precambrian-Paleozoic) at surface, covers 0.9 % of this area
Hornblende Gneiss/ Amphibolite
Lithology: gneiss; amphibolite
Hornblende Gneiss/ Amphibolite/ Granite Gneiss (Precambrian-Paleozoic) at surface, covers 0.3 % of this area
Hornblende Gneiss/ Amphibolite/ Granite Gneiss
Lithology: gneiss; amphibolite; granitic gneiss
Hornblende-Biotite Gneiss/ Amphibolite (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Hornblende-Biotite Gneiss/ Amphibolite
Lithology: mafic gneiss; amphibolite
Hornblende Gneiss/ Granite Gneiss/ Biotite Gneiss (Precambrian-Paleozoic) at surface, covers 0.2 % of this area
Hornblende Gneiss/ Granite Gneiss/ Biotite Gneiss
Lithology: gneiss; granitic gneiss; biotite gneiss
Amphibolite/ Epidote Quartzite/ Granite Gneiss (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Amphibolite/ Epidote Quartzite/ Granite Gneiss
Lithology: amphibolite; quartzite; granitic gneiss
Amphibolite/ Biotitic Gneiss/ Quartz Sericite Schist (Precambrian-Paleozoic) at surface, covers 0.2 % of this area
Amphibolite/ Biotitic Gneiss/ Quartz Sericite Schist
Lithology: amphibolite; biotite gneiss; schist
Amphibolite/ Mica Schist/ Biotitic Gneiss (Precambrian-Paleozoic) at surface, covers 0.2 % of this area
Amphibolite/ Mica Schist/ Biotitic Gneiss
Lithology: amphibolite; mica schist; biotite gneiss
Amphibolite / gabbro (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Amphibolite / gabbro
Lithology: amphibolite; gabbro
Gabbro (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Gabbro
Lithology: gabbro
Amphibolite/ Ultramafic (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Amphibolite/ Ultramafic
Lithology: amphibolite
Amphibolitic Schist (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Amphibolitic Schist
Lithology: amphibole schist
Amphibolitic Schist/ Amphibolite (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Amphibolitic Schist/ Amphibolite
Lithology: amphibole schist; amphibolite
Amphibolitic Schist/ Amphibolite-Metagraywacke/ Mica Schist (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Amphibolitic Schist/ Amphibolite-Metagraywacke/ Mica Schist
Lithology: amphibole schist; amphibolite; metasedimentary rock; mica schist
Mississippian undifferentiated (Mississippian) at surface, covers 0.1 % of this area
Mississippian undifferentiated: Includes Pennington Shale, Bangor Limestone (except in Floyd County), Hartselle Sandstone, Golconda Formation, Gasper Limestone, Ste. Genevieve Limestone and St. Louis Limestone
Lithology: limestone; shale; sandstone
Undifferentiated pelitic rocks (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Undifferentiated pelitic rocks, includes mica schists, metasiltstones, metaconglomerates, and metagraywackes
Lithology: mica schist; metasedimentary rock; meta-conglomerate
Miccosukee Formation (Neogene) at surface, covers 0.2 % of this area
Miccosukee Formation
Lithology: clay or mud; sand; gravel
Neogene undifferentiated (Neogene) at surface, covers 12 % of this area
Neogene undifferentiated, includes Altamaha Grit (Dall, 1892); Citronelle Formation (Matson & Berry, 1916); and "Hawthorn Formation" (Cooke, 1939). (*) - outcrops of indurated sandstone and claystone
Lithology: sandstone; claystone
Chickamauga Group; Middle Ordovician rocks; Athens Shale (Middle Ordovician) at surface, covers < 0.1 % of this area
Chickamauga Group; Middle Ordovician rocks; includes the Athens Shale (Oa)
Lithology: shale
Chickamauga Group undivided (Ordovician) at surface, covers 0.2 % of this area
Chickamauga Group undivided
Lithology: limestone
Knox Group undifferentiated (Ordovician-Cambrian) at surface, covers 0.8 % of this area
Knox Group undifferentiated
Lithology: dolostone (dolomite); limestone
Chickamauga Group; Chota Formation (Ordovician) at surface, covers < 0.1 % of this area
Chickamauga Group; Chota Formation
Lithology: limestone; calcarenite
Suwannee Limestone and its residuum (Oligocene) at surface, covers 0.4 % of this area
Suwannee Limestone and its residuum, as mapped, includes Chattahoochee Limestone in Seminole and Decatur Cos.; Flint River Formation, in part, (Cooke, 1939); Jacksonboro Limestone in Screven Co.; and Glendon and Marianna Limestones in Pulaski Co.
Lithology: limestone
Chickamauga Group; Holston Limestone (Ordovician) at surface, covers < 0.1 % of this area
Chickamauga Group; Holston Limestone
Lithology: limestone
Chickamauga Group; Middle Ordovician rocks; Lenoir Limestone (Middle Ordovician) at surface, covers < 0.1 % of this area
Chickamauga Group; Middle Ordovician rocks; Lenoir Limestone
Lithology: limestone
Chickamauga Group; Upper and Middle Ordovician Rocks (Omb) includes Moccasin Limestone and Bays Formation (Ordovician) at surface, covers < 0.1 % of this area
Chickamauga Group; Upper and Middle Ordovician Rocks (Omb) includes Moccasin Limestone and Bays Formation.
Lithology: limestone; sandstone
Newala Limestone (Ordovician) at surface, covers 0.2 % of this area
Newala Limestone
Lithology: limestone
Chickamauga Group; Middle Ordovician rocks; Rockmart Slate (Middle Ordovician) at surface, covers < 0.1 % of this area
Chickamauga Group; Middle Ordovician rocks; Rockmart Slate
Lithology: slate
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
Aluminous Schist (Precambrian-Paleozoic) at surface, covers 0.3 % of this area
Aluminous Schist
Lithology: schist
Sillimanite Schist (Precambrian-Paleozoic) at surface, covers 0.4 % of this area
Sillimanite Schist
Lithology: schist
Sillimanite Schist/ Gneiss (Precambrian-Paleozoic) at surface, covers 0.2 % of this area
Sillimanite Schist/ Gneiss
Lithology: schist; gneiss
Sillimanite Schist/ Gneiss/ Amphibolite (Precambrian-Paleozoic) at surface, covers 0.2 % of this area
Sillimanite Schist/ Gneiss/ Amphibolite
Lithology: schist; gneiss; amphibolite
Sillimanite Schist/ Amphibolite (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Sillimanite Schist/ Amphibolite
Lithology: schist; amphibolite
Lookout Sandstone; Gizzard Formation (Pennsylvanian) at surface, covers < 0.1 % of this area
Lookout Sandstone; Gizzard Formation
Lithology: shale; sandstone; coal
Lookout Sandstone; Sewanee Sandstone (Pennsylvanian) at surface, covers < 0.1 % of this area
Lookout Sandstone; Sewanee Sandstone
Lithology: conglomerate; sandstone
Pennsylvanian undifferentiated (Pennsylvanian) at surface, covers 0.2 % of this area
Pennsylvanian undifferentiated
Lithology: sandstone; shale; conglomerate
Garnet Mica Schist (Precambrian-Paleozoic) at surface, covers 0.2 % of this area
Garnet Mica Schist
Lithology: mica schist
Garnet Mica Schist/ Gneiss (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Garnet Mica Schist/ Gneiss
Lithology: mica schist; gneiss
Garnet Mica Schist/ Amphibolite (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Garnet Mica Schist/ Amphibolite
Lithology: mica schist; amphibolite
Metagraywacke undifferentiated (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Metagraywacke undifferentiated
Lithology: metasedimentary rock
Metagraywacke/ Mica Schist (Precambrian-Paleozoic) at surface, covers 0.9 % of this area
Metagraywacke/ Mica Schist
Lithology: metasedimentary rock; mica schist
Metagraywacke/ Mica Schist/ Calc-silicate Gneiss (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Metagraywacke/ Mica Schist/ Calc-silicate Gneiss
Lithology: metasedimentary rock; mica schist; gneiss
Metagraywacke/ Mica Schist-Quartzite/ Amphibolite (Precambrian-Paleozoic) at surface, covers 0.2 % of this area
Metagraywacke/ Mica Schist-Quartzite/ Amphibolite
Lithology: metasedimentary rock; mica schist; quartzite; amphibolite
Mica Schist/ Metasiltstone (Precambrian-Paleozoic) at surface, covers 0.1 % of this area
Mica Schist/ Metasiltstone
Lithology: mica schist; metasedimentary rock
Slate/ Quartzite/ Conglomerate (Precambrian-Paleozoic) at surface, covers 0.2 % of this area
Slate/ Quartzite/ Conglomerate
Lithology: slate; quartzite; conglomerate
Conglomerate (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Conglomerate
Lithology: conglomerate
Mica Schist (Precambrian-Paleozoic) at surface, covers 0.6 % of this area
Mica Schist
Lithology: mica schist
Mica Schist/ Amphibolite (Precambrian-Paleozoic) at surface, covers 0.1 % of this area
Mica Schist/ Amphibolite
Lithology: mica schist; amphibolite
Mica Schist/ Gneiss (Precambrian-Paleozoic) at surface, covers 0.8 % of this area
Mica Schist/ Gneiss
Lithology: mica schist; gneiss
Mica Schist/ Gneiss/ Amphibolite (Precambrian-Paleozoic) at surface, covers 1 % of this area
Mica Schist/ Gneiss/ Amphibolite
Lithology: mica schist; gneiss; amphibolite
Mica Schist/ Quartzite/ Gneiss/ Amphibolite (Precambrian-Paleozoic) at surface, covers 0.1 % of this area
Mica Schist/ Quartzite/ Gneiss/ Amphibolite
Lithology: mica schist; quartzite; gneiss; amphibolite
Graphite Schist (Precambrian-Paleozoic) at surface, covers 0.2 % of this area
Graphite Schist
Lithology: schist
Sericite Schist (Precambrian-Paleozoic) at surface, covers 0.1 % of this area
Sericite Schist
Lithology: schist
Sericite Schist/ Amphibolite (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Sericite Schist/ Amphibolite
Lithology: schist; amphibolite
Sericite Schist/ Amphibolite/ Granite gneiss (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Sericite Schist/ Amphibolite/ Granite gneiss
Lithology: schist; amphibolite; granitic gneiss
Sericite Schist/ Micaceous Quartzite/ Sericite Phyllite (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Sericite Schist/ Micaceous Quartzite/ Sericite Phyllite
Lithology: schist; quartzite; phyllite
Quartz Sericite Schist/ Biotitic Gneiss (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Quartz Sericite Schist/ Biotitic Gneiss
Lithology: schist; biotite gneiss
Quartz Mica Schist/ Hornblende Schist/ Biotitic Gneiss (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Quartz Mica Schist/ Hornblende Schist/ Biotitic Gneiss
Lithology: mica schist; amphibole schist; biotite gneiss
Button Mica Schist (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Button Mica Schist
Lithology: mica schist
Cross-Biotite Schist (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Cross-Biotite Schist
Lithology: biotite schist
Clayton Formation (Paleocene) at surface, covers < 0.1 % of this area
Clayton Formation
Lithology: sand; limestone; clay or mud
Nanafalia, Porters Creek, and Clayton Formations, undifferentiated (Paleocene) at surface, covers 0.2 % of this area
Nanafalia, Porters Creek, and Clayton Formations, undifferentiated
Lithology: clay or mud; sand
Nanafalia Formation (Paleocene) at surface, covers < 0.1 % of this area
Nanafalia Formation
Lithology: sand; clay or mud
Tuscahoma Sand (Paleocene) at surface, covers < 0.1 % of this area
Tuscahoma Sand, as mapped includes lower Eocene Bashi Marl Member of the Hatchetigbee Formation
Lithology: sand
Charlton Formation and Duplin Marl (Pliocene) at surface, covers < 0.1 % of this area
Charlton Formation and Duplin Marl
Lithology: limestone; clay or mud
Phyllite undifferentiated (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Phyllite undifferentiated
Lithology: phyllite
Meta-argillite/ Phyllite (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Meta-argillite/ Phyllite
Lithology: metasedimentary rock; phyllite
Graphitic Phyllite (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Graphitic Phyllite
Lithology: phyllite
Phyllite and Quartzite (Precambrian-Paleozoic) at surface, covers 0.5 % of this area
Phyllite and Quartzite
Lithology: phyllite; quartzite
Pleistocene-Pliocene sands and gravels (Pleistocene-Pliocene) at surface, covers 3 % of this area
Pleistocene-Pliocene sands and gravels, includes, in part, Sunderland, Coharie, and Brandywine "Formations" of Cooke, 1939
Lithology: sand; gravel
Quartzite (Precambrian-Paleozoic) at surface, covers 0.2 % of this area
Quartzite
Lithology: quartzite
Quartzite/ Mica Schist (Precambrian-Paleozoic) at surface, covers 0.2 % of this area
Quartzite/ Mica Schist
Lithology: quartzite; mica schist
Quartzite/ Mica Schist/ Amphibolite (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Quartzite/ Mica Schist/ Amphibolite
Lithology: quartzite; mica schist; amphibolite
Quartzite/ Metagraywacke (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Quartzite/ Metagraywacke
Lithology: quartzite; metasedimentary rock
Quartzite/ Phyllite (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Quartzite/ Phyllite
Lithology: quartzite; phyllite
Quartzite/ Biotite Granite Gneiss (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Quartzite/ Biotite Granite Gneiss
Lithology: quartzite; granitic gneiss
Epidote Quartzite/ Amphibolite/ Sericite Schist/ Biotite Granite Gneiss (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Epidote Quartzite/ Amphibolite/ Sericite Schist/ Biotite Granite Gneiss
Lithology: quartzite; amphibolite; schist; granite gneiss
Stream alluvium (Quaternary) at surface, covers 2 % of this area
Stream alluvium and undifferentiated terrace deposits
Lithology: alluvium; alluvial terrace
Aeolian sand deposits - formless deposits (Quaternary) at surface, covers < 0.1 % of this area
Aeolian sand deposits - formless deposits
Lithology: sand
Holocene Shoreline Complex - barrier island facies (Holocene) at surface, covers < 0.1 % of this area
Holocene Shoreline Complex - barrier island facies
Lithology: beach sand
Holocene Shoreline Complex - marsh and lagoonal facies (Holocene) at surface, covers 0.7 % of this area
Holocene Shoreline Complex - marsh and lagoonal facies
Lithology: unconsolidated deposit
Princess Anne shoreline complex - barrier island facies (Pleistocene) at surface, covers 0.1 % of this area
Princess Anne shoreline complex - barrier island facies
Lithology: beach sand
Princess Anne shoreline complex - marsh and lagoonal facies (Pleistocene) at surface, covers 0.2 % of this area
Princess Anne shoreline complex - marsh and lagoonal facies
Lithology: unconsolidated deposit
Aeolian sand deposits - parabolic dunes (Quaternary) at surface, covers < 0.1 % of this area
Aeolian sand deposits - parabolic dunes
Lithology: dune sand
Pamlico shoreline complex - barrier island facies (Pleistocene) at surface, covers 0.2 % of this area
Pamlico shoreline complex - barrier island facies
Lithology: beach sand
Pamlico shoreline complex - marsh and lagoonal facies (Pleistocene) at surface, covers 1 % of this area
Pamlico shoreline complex - marsh and lagoonal facies
Lithology: unconsolidated deposit
Penholoway shoreline complex - barrier island facies (Pleistocene) at surface, covers 0.5 % of this area
Penholoway shoreline complex - barrier island facies
Lithology: beach sand
Penholoway shoreline complex - marsh and lagoonal facies (Pleistocene) at surface, covers 0.6 % of this area
Penholoway shoreline complex - marsh and lagoonal facies
Lithology: unconsolidated deposit
Silver Bluff shoreline complex (Pleistocene) at surface, covers 0.1 % of this area
Silver Bluff shoreline complex
Lithology: beach sand
Talbot shoreline complex - barrier island facies (Pleistocene) at surface, covers 0.2 % of this area
Talbot shoreline complex - barrier island facies
Lithology: beach sand
Talbot shoreline complex - marsh and lagoonal facies (Pleistocene) at surface, covers 0.4 % of this area
Talbot shoreline complex - marsh and lagoonal facies
Lithology: unconsolidated deposit
Wicomico Shoreline Complex - barrier island facies (Pleistocene) at surface, covers 0.6 % of this area
Wicomico Shoreline Complex - barrier island facies
Lithology: beach sand
Wicomico Shoreline Complex - marsh and lagoonal facies (Pleistocene) at surface, covers 2 % of this area
Wicomico Shoreline Complex - marsh and lagoonal facies
Lithology: unconsolidated deposit
Red Mountain Formation (Silurian) at surface, covers 0.2 % of this area
Red Mountain Formation
Lithology: sandstone; shale
Lower Tertiary-Cretaceous undifferentiated (Lower Tertiary-Cretaceous) at surface, covers 0.5 % of this area
Lower Tertiary-Cretaceous undifferentiated, as mapped includes Middendorf Formation (Sloan, 1904); "Channel Sands" (LaMoreaux, 1946); Tuscaloosa Formation (Cooke, 1939); and "Huber beds" (Buie, informal terminology)
Lithology: sand; clay or mud
Ultramafic rocks undifferentiated (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Ultramafic rocks undifferentiated
Lithology: ultramafic intrusive rock
Mafic to intermediate metavolcanic rocks (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Mafic to intermediate metavolcanic rocks
Lithology: mafic metavolcanic rock; intermediate intrusive rock
Metadacite (Precambrian-Paleozoic) at surface, covers 0.2 % of this area
Metadacite
Lithology: metavolcanic rock
Felsic Metavolcanics (Precambrian-Paleozoic) at surface, covers 0.2 % of this area
Felsic Metavolcanics
Lithology: felsic metavolcanic rock
Undifferentiated Metavolcanics/ Sericite phyllite/ Meta-argillite/ Quartz mica schist (Precambrian-Paleozoic) at surface, covers 0.5 % of this area
Undifferentiated Metavolcanics/ Sericite phyllite/ Meta-argillite/ Quartz mica schist
Lithology: metavolcanic rock; phyllite; schist
Meta-argillite/ Sericite phyllite/ Metavolcanics (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area
Meta-argillite/ Sericite phyllite/ Metavolcanics
Lithology: metasedimentary rock; phyllite; metavolcanic rock
Rabun Gneiss (Ordovician) at surface, covers < 0.1 % of this area
Rabun Gneiss (450-500 my) - weakly to well foliated, granitic to quartz monzonitic.
Lithology: granitic gneiss
Meta-ultramafic Rock (Paleozoic/Late Proterozoic) at surface, covers < 0.1 % of this area
Meta-ultramafic Rock - metamorphosed dunite and peridotite; serpentine, soapstone, and other altered ultramafic rock. Only larger bodies shown.
Lithology: metamorphic rock; serpentinite
Ashe Metamorphic Suite and Tallulah Falls Formation; Amphibolite (Late Proterozoic) at surface, covers < 0.1 % of this area
Amphibolite - equigranular, massive to well foliated, interlayered, rarely discordant, metamorphosed intrusive to extrusive mafic rock; may include metasedimentary rock.
Lithology: amphibolite; metasedimentary rock
Ashe Metamorphic Suite and Tallulah Falls Formation; Muscovite-biotite gneiss (Late Proterozoic) at surface, covers < 0.1 % of this area
Muscovite-biotite gneiss - locally sulfidic; interlayered and gradational with mica schist, minor amphibolite, and hornblende gneiss.
Lithology: gneiss; mica schist; amphibolite
Brasstown Formation (Late Proterozoic) at surface, covers < 0.1 % of this area
Brasstown Formation - cross-biotite schist; includes micaceous quartzite in lower part.
Lithology: mica schist; quartzite
Ocoee Supergroup, Great Smokey Group; Copperhill Formation (Late Proterozoic) at surface, covers < 0.1 % of this area
Copperhill Formation - metagraywacke, massive, graded bedding common; includes dark-gray slate, mica schist, and nodular calc-silicate rock.
Lithology: metasedimentary rock; slate; mica schist; calc-silicate rock
Coweeta Group (Late Proterozoic) at surface, covers < 0.1 % of this area
Coweeta Group - quartz dioritic gneiss, feldspar-quartz-biotite gneiss, metasandstone and quartzite, alumino-silicate schist, garnetiferous biotite gneiss, and minor amphibolite. Quartz dioritic gneiss predominant.
Lithology: gneiss; metasedimentary rock; quartzite; schist; amphibolite
Ocoee Supergroup, Great Smokey Group; Dean Formation (Late Proterozoic) at surface, covers < 0.1 % of this area
Dean Formation - sericite schist with cross-biotite, staurolite, and garnet porphyroblasts; interbedded metagraywacke and quartz-pebble metaconglomerate.
Lithology: mica schist; metasedimentary rock
Ocoee Supergroup; Great Smokey Group, undivided (Late Proterozoic) at surface, covers < 0.1 % of this area
Great Smokey Group, undivided - thick metasedimentary sequence of massive to graded beds of metagraywacke and metasiltstone with interbedded graphitic and sulfidic slate and schist.
Lithology: metasedimentary rock; slate; schist
Ocoee Supergroup, Great Smokey Group; Metasandstone, Metagraywacke, Metasiltstone, and Mica Schist (Late Proterozoic) at surface, covers < 0.1 % of this area
Metasandstone, Metagraywacke, Metasiltstone, and Mica Schist - beds and lenses of calc-silicate rock locally abundant; garnet, staurolite, and cross-biotite porphyroblasts common in fine-grained layers. Includes Hughes Gap and Hothouse formations in southern area; Horse Branch Member of Ammons Formation and Grassy Branch Formation in northern area.
Lithology: metasedimentary rock; mica schist; calc-silicate rock
Murphy Marble, Andrews Formation, and Nottely Quartzite, undivided (Late Proterozoic) at surface, covers < 0.1 % of this area
Murphy Marble, Andrews Formation, and Nottely Quartzite, undivided - Murphy Marble: calcareous to dolomitic; Andrews Formation: calcareous cross-biotite schist; Nottely Quartzite: meta-orthoquartzite with slate.
Lithology: marble; schist; quartzite; slate
Mineral Bluff Formation (Late Proterozoic) at surface, covers < 0.1 % of this area
Mineral Bluff Formation - quartz-chlorite-sericite schist and phyllite with thin quartzite layers and minor interbedded graphitic schist, garnet-mica schist, staurolite schist, cross-biotite schist, and dark slate.
Lithology: schist; phyllite; quartzite; slate
Nantahala Formation and Tusquitee Quartzite, undivided (Late Proterozoic) at surface, covers < 0.1 % of this area
Nantahala Formation and Tusquitee Quartzite, undivided - Nantahala Formation: slate and metasiltstone, dark gray, laminated to thin bedded, sulfidic; Tusquitee Quartzite: white to light yellowish gray, numerous, thin slate layers.
Lithology: slate; metasedimentary rock; quartzite
Ocoee Supergroup, Great Smokey Group; Wehutty Formation (Late Proterozoic) at surface, covers < 0.1 % of this area
Wehutty Formation - slate to schist, dark gray, graphitic and sulfidic; includes mica schist, metagraywacke, and metaconglomerate.
Lithology: slate; schist; metasedimentary rock
Coweeta Group; Amphibolite (Middle/Late Proterozoic) at surface, covers < 0.1 % of this area
Amphibolite - equigranular, massive to well foliated, interlayered, rarely discordant, metamorphosed intrusive to extrusive mafic rock; may include metasedimentary rock.
Lithology: amphibolite; metasedimentary rock
Coweeta Group; Biotite Gneiss (Middle/Late Proterozoic) at surface, covers < 0.1 % of this area
Biotite Gneiss - migmatitic; interlayered and gradational with biotite-garnet gneiss and amphibolite; locally abundant quartz and alumino-silicates. Stratigraphic position uncertain.
Lithology: biotite gneiss; amphibolite
Mylonitic rocks of Brevard fault zone (Late Paleozoic) at surface, covers < 0.1 % of this area
Mylonitic and phyllonitic equivalents of Chauga River Formation and other adjacent rock units
Lithology: mylonite; phyllonite
Burkes Mountain complex, ultramafic rock (Cambrian or Neoproterozoic) at surface, covers < 0.1 % of this area
Burkes Mountain complex, ultramafic rock
Lithology: ultramafic intrusive rock
Chauga River Formation and Poor Mountain Formation, undivided (Cambrian or Neoproterozoic) at surface, covers < 0.1 % of this area
Chauga River Formation and Poor Mountain Formation, undivided
Lithology: metasedimentary rock
Biotite-plagioclase-quartz gneiss and biotite-muscovite schist (Cambrian or Neoproterozoic) at surface, covers < 0.1 % of this area
Biotite-plagioclase-quartz gneiss and biotite-muscovite schist: variably interlayered, containing subordinate layers of amphibolite and sillimanite-mica schist
Lithology: biotite gneiss; schist; amphibolite
Metavolcanic and metasedimentary rocks of Bel Air Belt (Ordovician to Neoproterozoic) at surface, covers < 0.1 % of this area
Metavolcanic and metasedimentary rocks of Bel Air Belt
Lithology: metavolcanic rock; metasedimentary rock
Wallhalla metamorphic suite (Cambrian or Neoproterozoic) at surface, covers < 0.1 % of this area
Wallhalla metamorphic suite: predominately hornblende-plagioclase gneiss and amphibolite, locally having interlayers of biotite-quartz-feldspar gneiss, undivided
Lithology: mafic gneiss; amphibolite
Granite (Carboniferous to Permian) at surface, covers < 0.1 % of this area
Granite
Lithology: granite
Granodiorite gneiss and granite gneiss (Devonian to Silurian) at surface, covers < 0.1 % of this area
Granodiorite gneiss and granite gneiss
Lithology: granitic gneiss
Latimer complex of Griffin (1979) (Paleozoic or Neoproterozoic) at surface, covers < 0.1 % of this area
Latimer complex of Griffin (1979): metamorphosed mafic-ultramafic complex consisting mainly of mafic rocks including amphibolite, metagabbro, and greenstone metabasalt
Lithology: amphibolite; metamorphic rock; greenstone
Mylonitic rocks of Modoc Fault Zone (Late Paleozoic) at surface, covers < 0.1 % of this area
Mylonitic rocks of Modoc Fault Zone: mylonite gneiss
Lithology: mylonite
Chenier plain and deltas of Suwannee & Chattahoochie Rivers (Holocene) at surface, covers < 0.1 % of this area
Chenier plain and deltas of Suwannee & Chattahoochie Rivers
Lithology: unconsolidated deposit
Penholoway Formation (Pleistocene) at surface, covers < 0.1 % of this area
Penholoway Formation: Similar to Cape May, broad lateral extent underlying terraces in the Carolinas; swamps and ridges on terrace surface were originally barrier islands and back bays. Superimposed on these landforms are swarms of Carolina bays.
Lithology: sand; clay or mud
Socastee Formation (Pleistocene) at surface, covers < 0.1 % of this area
Socastee Formation: Low coastal formation in Carolinas like Penholoway but younger and lower in altitude.
Lithology: sand; clay or mud
Gneissic granite of Starr (Silurian to Ordovician) at surface, covers < 0.1 % of this area
Gneissic granite of Starr: gneissic biotite granite to granodiorite of Starr pluton and nearby satellite plutons
Lithology: granitic gneiss
Waccamaw Formation (Pleistocene) at surface, covers < 0.1 % of this area
Waccamaw Formation: Another Carolina costalized terrace of early-middle Pleistocene age. Deeply weathered.
Lithology: sand; limestone
Conasauga Group, including Maynardville Limestone, Nolichucky Shale, the Maryville, Rogersville, and Rutledge Formations, Pumpkin Valley Shale, Rome Formation, and Shady Dolomite (Cambrian) at surface, covers < 0.1 % of this area
Conasauga Group - Mostly shale northwest of a line connecting Etowah and Bearden (Knoxville); to the east it consists of the six formations at right [Cmn, Maynardville Limestone. Ccl including Cn, Nolichucky Shale, Cmr Maryville, Rogersville, and Rutledge Formations, and Pumpkin Valley Shale; Cr, Rome Formation, and Cs, Shady Dolomite. Thickness about 2,000 feet.
Lithology: shale; limestone; dolostone (dolomite); sandstone; siltstone
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
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
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)
Rome Formation (Cambrian) at surface, covers < 0.1 % of this area
Rome Formation - Variegated (red, green, yellow) shale and siltstone with beds of gray, fine-grained sandstone. Maximum exposed thickness 1,500 feet.
Lithology: shale; siltstone; sandstone
Bangor Limestone and Hartselle Formation (Mississippian) at surface, covers < 0.1 % of this area
Bangor Limestone - Dark brownish-gray limestone, thick-bedded. Thickness 100 to 250 feet; and Hartselle Formation - Thin-bedded, fine-grained sandstone and greenish-gray shale interbedded with coarse limestone. Thickness 0 to 60 feet.
Lithology: limestone; sandstone; shale
Fort Payne Formation (Mississippian) at surface, covers < 0.1 % of this area
Fort Payne Formation - Bedded chert, calcareous and dolomitic, somewhat crinoidal; and minor shale. Thin green shale (Maury) at base. Average thickness about 200 feet.
Lithology: chert; shale
Monteagle Limestone (Mississippian) at surface, covers < 0.1 % of this area
Monteagle Limestone - Fragmental and oolitic limestone, light-gray; and fine-grained, brownish-gray limestone. Thickness 180 to 350 feet.
Lithology: limestone
Newman Limestone (Mississippian) at surface, covers < 0.1 % of this area
Newman Limestone - Gray limestone sequence near Cumberland Plateau and on Whiteoak Mountain. Shaly limestone, shale, siltstone, and sandstone on Chilhowee Mountain. Thickness about 700 feet.
Lithology: limestone; shale; siltstone; sandstone
Pennington Formation (Mississippian) at surface, covers < 0.1 % of this area
Pennington Formation - Highly variegated clay shale, distinctive; contains siltstone and locally gray, fine-grained sandstone. Thickness 400 to 700 feet.
Lithology: shale; siltstone; sandstone
St. Louis Limestone and Warsaw Limestone (Mississippian) at surface, covers < 0.1 % of this area
St. Louis Limestone - Residuum of nodules and blocks of chert in sandy clay. (Originally grayish-brown, medium-bedded limestone.) Maximum preserved thickness about 50 feet. Warsaw Limestone - Residuum of porous chert blocks in sandy clay. (Originally gray, medium- to coarse-grained, thick- bedded limestone.) Thickness about 60 feet.
Lithology: clay or mud; chert
Athens Shale (Ordovician) at surface, covers < 0.1 % of this area
Athens Shale - Medium- to dark-gray, calcareous, graptolitic shale; calcareous gray sandstone, siltstone, and locally fine-pebble quartz conglomerate; nodules of shaly limestone near base. Maximum thickness 1,500 feet.
Lithology: shale; sandstone; siltstone; conglomerate; 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
Chickamauga Group, includes Upper part of Chickamauga Group (Reedsville Shale, and Unnamed limestone unit) and Middle and Lower part of Chickamauga Group (Moccasin Formation, Bays Formation, Ottosee Shale, Holston Formation, Lenoir Limestone, Athens Shale, and Sevier Shale) (Ordovician) at surface, covers < 0.1 % of this area
Chickamauga Group - In the northwest part of the Valley and Ridge a predominantly limestone sequence about 2,000 feet thick. Becomes progressively more clastic and thicker to the southeast, including Upper part of Chickamauga Group (Reedsville Shale- Greenish-gray calcareous shale. Thickness 0 to 400 feet, and Unnamed Limestone Unit - Medium-grained, fossiliferous, gray limestone, shaly in part. Thickness as much as 600 feet ) and.Middle and lower parts of Chickamauga Group (Omlc)
Lithology: limestone; shale; siltstone; sandstone
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
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
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
Sequatchie Formation (Ordovician) at surface, covers < 0.1 % of this area
Sequatchie Formation - Maroon and gray shaly limestone, mottled greenish; with interbeds of calcareous, olive to maroon shale and siltstone. Average thickness about 200 feet.
Lithology: limestone; shale; siltstone
Crab Orchard Mountains Group (Pennsylvanian) at surface, covers < 0.1 % of this area
Crab Orchard Mountains Group - Only the lowest formation of the group, the Sewanee Conglomerate, is preserved in the area of this sheet. Sewanee is gray to brown, medium- to coarse-grained conglomeratic sandstone, with a thin zone of ferruginous quartz- and shale-pebble conglomerate at base. Maximum preserved thickness 35 feet.
Lithology: conglomerate; sandstone
Gizzard Group including Warren Point Sandstone and Raccoon Mountain Formation (Pennsylvanian) at surface, covers < 0.1 % of this area
Gizzard Group - Sandstone, conglomeratic sandstone, siltstone, shale, and minor coal. Thickness 100 to 200 feet. Includes Warren Point Sandstone - Gray to brown sandstone and minor conglomeratic sandstone. Thickness 60 to 160 feet; Raccoon Mountain Formation - Siltstone, sandstone, shale, and minor coal. Thickness 0 to 65 feet.
Lithology: sandstone; shale; siltstone; coal
Great Smoky Group, including Anakeesta Formation, Thunderhead Sandstone, and Elkmont Sandstone (Precambrian) at surface, covers < 0.1 % of this area
Great Smoky Group - Characterized by very massive layers of coarse graywacke and arkose. The formations have been mapped only in the region of the Great Smoky Mountains. Near Ducktown, in ascending order, the Copperhill, Hughes Gap, Hothouse, and Dean Formations are recognized. Thickness 14,000 to about 40,000 feet. Includes Anakeesta Formation - Dark-gray, bluish-gray, and black slate with dark-gray interbeds of fine-grained sandstone. Thickness 3,000 to 4,500 feet; Thunderhead Sandstone - Coarse, gray feldspathic sandstone, graywacke, and conglomerate; occurs in massive ledges; graded bedding and blue quartz characteristic. Thickness 5,500 to 6,300 feet; Elkmont Sandstone - Coarse to fine, gray feldspathic sandstone, graywacke, and fine conglomerate; generally finer grained beds in lower part; graded bedding typical. Thickness 1,000 to 8,000 feet
Lithology: graywacke; arkose; slate; sandstone; conglomerate
Walden Creek Group; Sandsuck Formation (Precambrian) at surface, covers < 0.1 % of this area
Wladen Creek Group; Sandsuck Formation - Olive-green and gray, argillaceous, micaceous shale with coarse feldspathic sandstone and quartz- pebble conglomerate. Thickness about 2,000 feet.
Lithology: shale; sandstone; conglomerate
Walden Creek Group, including Sandsuck Formation, Wilhite Formation, Shields Formation, and Licklog Formation (Cambrian) at surface, covers < 0.1 % of this area
Walden Creek Group - The formations, other than the Sandsuck, are applicable mainly in the region of the Great Smoky Mountains. Thickness about 8,000 feet, Includes Sandsuck Formation - Olive-green and gray, argillaceous, micaceous shale with coarse feldspathic sandstone and quartz- pebble conglomerate. Thickness about 2,000 feet; Wilhite Formation - Gray to green siltstone and slate with interbeds of pebble conglomerate, sandstone, and quartzite. Thickness about 4,000 feet; Shields Formation - Massive conglomerate, sandstone, argillaceous slate; conglomerate (pebbles of various rock types) characteristic. Thickness about 1,500 feet.; Licklog Formation - Feldspathic sandstone, greenish phyllite, and bluish-gray slate. Thickness about 1,500 feet.
Lithology: shale; siltstone; sandstone; conglomerate; slate; quartzite; phyllite
Rockwood Formation (Silurian) at surface, covers < 0.1 % of this area
Rockwood Formation - Brown to maroon shale, thin gray siltstone and sandstone, and thin lenticular layers of oolitic and fossiliferous red hematite. Thickness 200 to 800 feet.
Lithology: shale; siltstone; sandstone

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