Geologic units in South Carolina (state in United States)

Duplin Formation (Pliocene) at surface, covers 8 % of this area

Coastal terrace of Carolinas. Pliocene equivalent to Yorktown. Deeply weathered.

Bear Bluff Formation (Pliocene) at surface, covers 8 % of this area

One of the older coastal terrace sequences in the Carolinas. Equivalent to Windsor Fm.

Socastee Formation (Pleistocene) at surface, covers 6 % of this area

Low coastal formation in Carolinas like Penholoway but younger and lower in altitude.

Alluvial Valley Swamp (Quaternary) at surface, covers 6 % of this area

Unconformable on all underlying units, fluvial sand and gravel at base, grading upwards into fine sands and silts, local peat. May be overrun with recent sediments from forest cutting and agriculture.

Huber/Lisbon/Barnwell Formations, undivided (Eocene) at surface, covers 6 % of this area

Poorly to well sorted sand, clay and carbonates deposited in delta-dominated fluvial- and open-marine environments. Unit is characterized by commercial kaolin bodies in older strata from westernmost South Carolina to central Georgia. Younger strata are cyclic marine deposits which deeper water facies exposed in western Georgia. Carbonate facies are locally mined in western Georgia for agricultural lime.

Waccamaw Formation (Pleistocene) at surface, covers 5 % of this area

Another Carolina costalized terrace of early-middle Pleistocene age. Deeply weathered.

Peedee Formation - Black Creek Group, undivided (Cretaceous) at surface, covers 5 % of this area

Peedee Formation - Black Creek Group, undivided

Persimmon Fork Formation (Cambrian to Neoproterozoic) at surface, covers 4 % of this area

Predominately metatuff

Penholoway Formation (Pleistocene) at surface, covers 4 % of this area

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.

Tidal Marsh (Quaternary) at surface, covers 3 % of this area

Peat and muck deposits along tidal margins of esturaries and back bays. Deposits range from a few feet to 60+ feet deep. Locally include silt and fine sand and clay as levees on tidal channels. At depth peaty material may be accumulated from fresh water plants. Peat at the surface dominated by spartina and other salt tolerant species.

Chenier plain and deltas of Suwannee & Chattahoochie Rivers (Holocene) at surface, covers 3 % of this area

Chenier plain and deltas of Suwannee & Chattahoochie Rivers

Metamorphosed granite and granodiorite (Cambrian or Neoproterozoic) at surface, covers 3 % of this area

Metamorphosed granite and granodiorite

Biotite-plagioclase-quartz gneiss and biotite-muscovite schist (Cambrian or Neoproterozoic) at surface, covers 2 % of this area

Variably interlayered, containing subordinate layers of amphibolite and sillimanite-mica schist

Neogene strata (undifferentiated) (Neogene) at surface, covers 2 % of this area

Poorly sorted clayey sand and gravel deposited in a fluvial environment in South Carolina but becoming more fluvio-marine in Georgia. Unit is characterized by insitu weathered feldspar and an abundance of quartzite gravel and cobbles.

Migmatitic granitoid gneiss (Ordovician) at surface, covers 2 % of this area

Variably foliated, variably migmatitic, and granitic to quartz dioritic in composition

Black Creek/Cusseta/Blufftown Formations (Cretaceous) at surface, covers 2 % of this area

Moderately to poorly sorted sand and clay deposited in delta-dominated shallow marine environments. Unit is characterized by sands containing locally abundant (F-VC grained) tourmaline and (F-VC grained) muscovite with some monazite and garnet. Clay layers are also common and some lower delta plain deposits form commercial kaolin bodies. Generally very restricted marine in eastern Georgia becoming more open marine to the east and west.

Biotite quartz-plagioclase gneiss (Paleozoic or Neoproterozoic) at surface, covers 2 % of this area

Biotite quartz-plagioclase gneiss with minor interlayers of amphibolite gneiss and mica schist

Gneiss of Laurens area (Cambrian or Neoproterozoic) at surface, covers 1 % of this area

Biotite-quartz-plagioclase gneiss and interlayers locally containing hornblende, sillimanite, microcline, and muscovite

Sillimanite schist and sillimanite-mica schist (Cambrian or Neoproterozoic) at surface, covers 1 % of this area

Sillimanite-rich aluminous schist composed mainly of sillimanite, biotite, muscovite, and minor quartz

Richtex Formation (Ordovician to Middle Cambrian) at surface, covers 1 % of this area

Laminated metamudstone; contains Middle Cambrian or younger sponge spicules

Metamorphosed granitoid rocks, undivided (Paleozoic to Neoproterozoic) at surface, covers 1 % of this area

Metamorphosed granitoid rocks, undivided

biotite-quartz-feldspar gneiss of the Whitmire reentrant (Cambrian and/or Neoproterozoic) at surface, covers 1 % of this area

Biotite-quartz-feldspar gneiss

Biotite gneiss and muscovite-biotite gneiss (Cambrian or Neoproterozoic) at surface, covers 1 % of this area

Layered biotite-quartz-feldspar gneiss

Cape Fear/Eutaw Formations (Cretaceous) at surface, covers 1 % of this area

Poorly sorted clayey sand and gravel deposited in delta-dominated fluvial- and restricted marine environments. Unit is characterized by an abundance of smoky quartz gravel, feldspar, monazite, and garnet typically concentrated in placer deposits. Generally non-marine from North Carolina to central Georgia but contains shallow-water delta-front deposits in western Georgia.

Swamp (Quaternary) at surface, covers 1.0 % of this area

Extensive cypress swamps occur in low-lying poorly-drained bay deposits. Limit of cypress is southern Delaware; from NJ south to Georgia. Atlantic white cedar is original species. Commonly extensive thick peat and buried wood.

Reedy River complex (Paleozoic) at surface, covers 0.9 % of this area

Gneissic biotite granite to granodiorite

Felsic metavolcanic rocks and felsic gneiss interpreted to the metavolcanics (Ordovician to Neoproterozoic) at surface, covers 0.9 % of this area

Felsic metavolcanic rocks and felsic gneiss interpreted to the metavolcanics

Wallhalla metamorphic suite (Cambrian or Neoproterozoic) at surface, covers 0.8 % of this area

Predominately hornblende-plagioclase gneiss and amphibolite, locally having interlayers of biotite-quartz-feldspar gneiss, undivided

Granite - Bald Rock pluton (Carboniferous to Permian) at surface, covers 0.6 % of this area

Granite - Bald Rock pluton

Mylonite gneiss (Late Paleozoic) at surface, covers 0.6 % of this area

Mylonite gneiss

Wando Formation (Pleistocene) at surface, covers 0.6 % of this area

Another Carolina coastal terrace sequence like Penholoway . This is the youngest and lowest. Late Pleistocene

Sillimanite-mica schist and muscovite-biotite schist (Cambrian or Neoproterozoic) at surface, covers 0.5 % of this area

Thin to thick layered sillimanite-mica schist and sillimanite-bearing muscovite-biotite schist

Black Mingo/Clayton Formations (Tertiary) at surface, covers 0.5 % of this area

Poorly to well sorted sand and clay deposited in delta-dominated fluvial- and shallow marine environments. Older parts of unit are characterized by an abundance of feldspar and local sillimanite. Unit is generally delta plain and lagoon deposits in South Carolina becoming open marine calcareous sand and clay in western Georgia. In central Georgia, unit contains an abundance of commercial kaolin deposits formed in lower delta plain environments.

Asbill Pond Formation (Middle Cambrian) at surface, covers 0.5 % of this area

Metamorphosed siltstones and sandstones having interbedded felsic to mafic metavolcanic rocks

Newberry granite (Silurian) at surface, covers 0.5 % of this area

Newberry granite

Gneissic granite of Starr (Silurian to Ordovician) at surface, covers 0.5 % of this area

Gneissic biotite granite to granodiorite of Starr pluton and nearby satellite plutons

Granite - Liberty Hill pluton (Carboniferous to Permian) at surface, covers 0.5 % of this area

Granite - Liberty Hill pluton

Little River Sequence, metasedimentary rocks (Cambrian or Neoproterozoic) at surface, covers 0.5 % of this area

White-mica schist and phyllite, metatuff, quartz-muscovite schist, and minor quartzite

Chauga River Formation and Poor Mountain Formation, undivided (Cambrian or Neoproterozoic) at surface, covers 0.4 % of this area

Chauga River Formation and Poor Mountain Formation, undivided

Megacrystic biotite gneiss (Cambrian or Neoproterozoic) at surface, covers 0.4 % of this area

Variably layered biotite-quartz-feldspar gneiss having porphyroclasts and/or porphyroblasts of plagioclase and locally of quartz and potassium feldspar

Migmatite paragneiss and schist of Kiokee belt (Cambrian or Neoproterozoic) at surface, covers 0.4 % of this area

Migmatitic hornblende-biotite paragneiss having interlayered sillimanite schist and amphibolite

Mylonitic rocks of Modoc Fault Zone (Late Paleozoic) at surface, covers 0.4 % of this area

Mylonite gneiss

Lockhart metadiorite (Early Paleozoic-Neoproterozoic) at surface, covers 0.4 % of this area

Metadiorite and minor metagabbro, containing sparse hornblendite and pyroxenite

Battleground Formation, Mafic to intermediate metavolcanic rocks (Neoproterozoic) at surface, covers 0.4 % of this area

Battleground Formation, Mafic to intermediate metavolcanic rocks

Amphibolite and amphibolite gneiss (Paleozoic to Neoproterozoic) at surface, covers 0.4 % of this area

Amphibolite and amphibolite gneiss

Metagabbro - Chester (Middle Paleozoic to Neoproterozoic) at surface, covers 0.3 % of this area

Metagabbro and minor metadiorite

Tallulah Falls Formation, gneiss and schist (Neoproterozoic) at surface, covers 0.3 % of this area

Biotite-quartz-plagioclase gneiss interpreted to be metagraywacke, and interlayered biotite-muscovite schist, garnet-mica schist and amphibolite

Granite gneiss (Silurian to Ordovician) at surface, covers 0.3 % of this area

Equigranular to inequigranular granite gneiss and augen gneiss, undivided

Granite - Winnsboro pluton (Carboniferous to Permian) at surface, covers 0.3 % of this area

Granite - Winnsboro pluton

Gneissic granite of Antreville pluton (Silurian to Ordovician) at surface, covers 0.3 % of this area

Gneissic biotite granite to granodiorite

Battleground Formation, Metasedimentary rocks, undivided (Neoproterozoic) at surface, covers 0.3 % of this area

Quartz-sericite schist/phyllite and interlayered quartzite, quartz-pebble conglomerate, high-alumina quartzite, and manganiferous schist

Gray Court metagranite (Devonian) at surface, covers 0.3 % of this area

Foliated, medium-grained, equigranular to porphyritic biotite granite

Gneissic granite of Greenville (Paleozoic) at surface, covers 0.2 % of this area

Granite gneiss

Metamorphosed quartz diorite to diorite (Early Paleozoic-Neoproterozoic) at surface, covers 0.2 % of this area

Metamorphosed quartz diorite to diorite

Granite - Batesburg (gneissic) pluton (Carboniferous to Permian) at surface, covers 0.2 % of this area

Granite - Batesburg (gneissic) pluton

Granite (Carboniferous to Permian) at surface, covers 0.2 % of this area

Granite

Biotite metatonalite and granodiorite (Early Paleozoic-Neoproterozoic) at surface, covers 0.2 % of this area

Biotite metatonalite and granodiorite

Beach (Holocene) at surface, covers 0.2 % of this area

Holocene beach complex sediments. Sands and gravels of littoral zone, dune system, barrier system.

Peedee Formation (Cretaceous) at surface, covers 0.2 % of this area

Peedee Formation

Cid Formation, Mudstone Member (Ordovician to Late Cambrian) at surface, covers 0.2 % of this area

Thin bedded tuffaceous metasiltstone

Metagabbro and minor metadiorite (Middle Paleozoic to Neoproterozoic) at surface, covers 0.2 % of this area

Metagabbro and minor metadiorite

Mafic to intermediate metavolcanics including layered hornblende gneiss and amphibolite (Ordovician to Neoproterozoic) at surface, covers 0.2 % of this area

Mafic to intermediate metavolcanics including layered hornblende gneiss and amphibolite

Porphyritic granite of Lowrys pluton (Devonian) at surface, covers 0.2 % of this area

Porphyritic granite of Lowrys pluton

Little Mountain metatonalite (Neoproterozoic) at surface, covers 0.2 % of this area

Little Mountain metatonalite

Garnetiferous mica schist (Cambrian or Neoproterozoic) at surface, covers 0.2 % of this area

Aluminous muscovite-biotite schist, locally having subordinate amphibolite layers

Phyllonite and phyllonitic schist (Late Paleozoic) at surface, covers 0.2 % of this area

Phyllonite and phyllonitic schist

Battleground Formation, Schistose to phyllitic volcaniclastic rocks (Neoproterozoic) at surface, covers 0.1 % of this area

Battleground Formation, Schistose to phyllitic volcaniclastic rocks

Pacolet granite (Devonian) at surface, covers 0.1 % of this area

Pacolet granite

Great Falls metagranite (Cambrian or Neoproterozoic) at surface, covers 0.1 % of this area

Foliated, metamorphosed muscovite-biotite granite having accessory garnet and discordantly intruding surrounding rocks

Amphibolite and interlayered biotite gneiss, hornblende gneiss and minor mica schist (Cambrian or Neoproterozoic) at surface, covers 0.1 % of this area

Amphibolite and interlayered gneiss, hornblende gneiss and minor mica schist

Metadiorite (Cambrian or Neoproterozoic) at surface, covers 0.1 % of this area

Metadiorite

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

Battleground Formation, Felsic metavolcanic rocks (Neoproterozoic) at surface, covers 0.1 % of this area

Battleground Formation, Felsic metavolcanic rocks

Granodiorite gneiss and granite gneiss (Devonian to Silurian) at surface, covers < 0.1 % of this area

Granodiorite gneiss and granite gneiss

Edgemoor metagranite (Cambrian or Neoproterozoic) at surface, covers < 0.1 % of this area

Medium-grained, foliated to non-foliated, metamorphosed metagranite containing biotite +/- muscovite +/- garnet

Metatonalite (Neoproterozoic) at surface, covers < 0.1 % of this area

Metamorphosed biotite tonalite and lesser amounts of hornblende tonalite, trondhjemite, and granodiorite

Gabbro - Odgen pluton (Devonian to Silurian) at surface, covers < 0.1 % of this area

Gabbro - Odgen pluton

Longtown Metagranite (Neoproterozoic) at surface, covers < 0.1 % of this area

Biotite metagranite

Henderson Gneiss (Cambrian) at surface, covers < 0.1 % of this area

Biotite granitoid augen gneiss having distinctive microcline augen; monzonite to granodiorite composition

Philson Crossroads complex (Age uncertain) at surface, covers < 0.1 % of this area

Biotite-quartz-feldspar gneiss having interlayers of amphibolite and metagranite

Blacksburg Formation (Neoproterozoic) at surface, covers < 0.1 % of this area

Metamorphosed sedimentary sequence of interlayered sericite schist and phyllite, sericite quartzite, marble, amphibolite and calc-silicate rock

Equigranular granite of Lowrys pluton (Devonian) at surface, covers < 0.1 % of this area

Equigranular granite of Lowrys pluton

Granite - York pluton (Carboniferous to Permian) at surface, covers < 0.1 % of this area

Granite - York pluton

Biotite gneiss with interlayered marble, calcsilicate gneiss, sillimanite-muscovite schist, and garnet-quartz rock (Age uncertain) at surface, covers < 0.1 % of this area

Biotite gneiss having interlayered marble, calc-silicate rock, sillimanite-muscovite schist, and garnet-quartz rock

Santuck granite (Paleozoic) at surface, covers < 0.1 % of this area

Santuck granite

Gabbro - Greenwood pluton (Devonian to Silurian) at surface, covers < 0.1 % of this area

Gabbro - Greenwood pluton

Anderson metagabbro (Paleozoic) at surface, covers < 0.1 % of this area

Anderson metagabbro

Waxhaw metagranite (Ordovician to Cambrian) at surface, covers < 0.1 % of this area

Metamorphosed fine- to medium-grained biotite granite and hypabyssal quartz porphyry, non-foliated except adjacent to Gold Hill and Waxhaw shear zones where it is gneissic to phyllonitic

Metagabbro - Big Wateree Creek (Middle Paleozoic to Neoproterozoic) at surface, covers < 0.1 % of this area

Metagabbro and minor metadiorite

Granite - Coronaca pluton (Carboniferous to Permian) at surface, covers < 0.1 % of this area

Granite - Coronaca pluton

Diorite-gabbro - Dutchman's Creek pluton (Carboniferous) at surface, covers < 0.1 % of this area

Diorite-gabbro - Dutchman's Creek pluton

Granite - Pageland pluton (Carboniferous to Permian) at surface, covers < 0.1 % of this area

Granite - Pageland pluton

Granite - Clover pluton (Carboniferous to Permian) at surface, covers < 0.1 % of this area

Granite - Clover pluton

Enoree melange, Cedar Shoals gneiss and Cross Anchor mafic complex (Age uncertain) at surface, covers < 0.1 % of this area

Cedar Shoals gneiss is biotite-quartz-feldspar gneiss interpreted as metagraywacke; interlayered felsic gneiss interpreted as metavolcanic rock.

Gabbro of Concord Plutonic Suite (Devonian to Silurian) at surface, covers < 0.1 % of this area

Gabbro of Concord Plutonic Suite

Mean Crossroads intrusive complex (Early Paleozoic-Neoproterozoic) at surface, covers < 0.1 % of this area

Metadiorite and minor metagabbro, containing sparse hornblendite and pyroxenite

Pleasant Hill metagranite (Cambrian or Neoproterozoic) at surface, covers < 0.1 % of this area

Possibly similar to nearby Great Falls metagranite

Gabbro - Rock Hill South pluton (Devonian to Silurian) at surface, covers < 0.1 % of this area

Gabbro - Rock Hill South pluton

Gabbro - Calhoun Falls pluton (Devonian to Silurian) at surface, covers < 0.1 % of this area

Gabbro - Calhoun Falls pluton

Wildcat Branch complex (Early Paleozoic-Neoproterozoic) at surface, covers < 0.1 % of this area

Metadiorite and minor metagabbro, containing sparse hornblendite and pyroxenite

Toxaway Gneiss (Mesoproterozoic) at surface, covers < 0.1 % of this area

Banded granite gneiss consisting of very light gray layers rich in quartz, plagioclase, and microcline alternating with dark gray biotite-rich layers

Metatrondhjemite (Neoproterozoic) at surface, covers < 0.1 % of this area

Metatrondhjemite

Granite - Cherryville pluton (Carboniferous to Permian) at surface, covers < 0.1 % of this area

Granite - Cherryville pluton

Granite - Clouds Creek pluton (Carboniferous to Permian) at surface, covers < 0.1 % of this area

Granite - Clouds Creek pluton

Lincolnton Metadacite (Neoproterozoic) at surface, covers < 0.1 % of this area

Lincolnton Metadacite

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

Flat Swamp Formation (AKA Flat Swamp Member of Cid Formation) (Ordovician to Neoproterozoic) at surface, covers < 0.1 % of this area

Crystal and lithic metatuff of rhyolite to rhyodacite composition

Diorite (Age uncertain) at surface, covers < 0.1 % of this area

Includes unmetamorphosed, undeformed biotite-hornblende diorite

Granite - Columbia pluton (Carboniferous to Permian) at surface, covers < 0.1 % of this area

Granite - Columbia pluton

Gabbro - Mt. Carmel pluton (Devonian to Silurian) at surface, covers < 0.1 % of this area

Gabbro - Mt. Carmel pluton

Brandywine Formation (Miocene) at surface, covers < 0.1 % of this area

Upland gravel similar to Columbia group mapped in the uplands of southern Maryland southeast of DC. 10-40 ft thick. Extensive sand and gravel resources.

Chatham Group, undivided (Triassic) at surface, covers < 0.1 % of this area

Conglomerate, sandstone and mudstone

Gabbro - Buffalo pluton (Devonian to Silurian) at surface, covers < 0.1 % of this area

Gabbro - Buffalo pluton

Toluca Granite and associated metagranites (Ordovician) at surface, covers < 0.1 % of this area

Weakly to strongly foliated, garnet-bearing, metamorphosed monzogranite to granodiorite; ranges from equigranular and medium-grained to inequigranular having coarse microcline megacrysts

Gabbro - Rock Hill North pluton (Devonian to Silurian) at surface, covers < 0.1 % of this area

Gabbro - Rock Hill North pluton

Granite - Cuffytown Creek pluton (Carboniferous to Permian) at surface, covers < 0.1 % of this area

Granite - Cuffytown Creek pluton

Quartz-sericite phyllite and schist (Cambrian to Neoproterozoic) at surface, covers < 0.1 % of this area

Quartz-sericite phyllite and schist

Tuffaceous metasiltstone (Early Paleozoic-Neoproterozoic) at surface, covers < 0.1 % of this area

Tuffaceous metasiltstone

Granite - Cold Point pluton (Carboniferous to Permian) at surface, covers < 0.1 % of this area

Granite - Cold Point pluton

Caesars Head Granite (Ordovician to Silurian) at surface, covers < 0.1 % of this area

Well foliated, banded to non-banded biotite granitoid gneiss or gneissic granitoid; cuts Seneca thrust fault

Granite - Catawba-Roddey pluton (Carboniferous to Permian) at surface, covers < 0.1 % of this area

Granite - Catawba-Roddey pluton

Gabbro - McCormick pluton (Devonian to Silurian) at surface, covers < 0.1 % of this area

Gabbro - McCormick pluton

Granite - Edgefield pluton (Carboniferous to Permian) at surface, covers < 0.1 % of this area

Granite - Edgefield pluton

Granite - Harbison pluton (Carboniferous to Permian) at surface, covers < 0.1 % of this area

Granite - Harbison pluton

Yorktown Formation and Duplin Formation, Undivided (Tertiary) at surface, covers < 0.1 % of this area

Yorktown Formation: fossiliferous clay with varying amounts of fine-grained sand, bluish gray, shell material commonly concentrated in lenses; mainly in area north of Neuse River. Duplin Formation: shelly, medium- to coarse-grained sand, sandy marl, and limestone, bluish gray; mainly in area south of Neuse River.

Black Creek Formation (Cretaceous) at surface, covers < 0.1 % of this area

Clay, gray to black, lignitic; contains thin beds and laminae of fine-grained micaceous sand and thick lenses of cross-bedded sand. Glauconitic, fossiliferous clayey sand lenses in upper part.

Latimer complex of Griffin (1979) (Paleozoic or Neoproterozoic) at surface, covers < 0.1 % of this area

Metamorphosed mafic-ultramafic complex consisting mainly of mafic rocks including amphibolite, metagabbro, and greenstone metabasalt

Granite sheets near Joanna (Paleozoic) at surface, covers < 0.1 % of this area

Granite sheets near Joanna

Unnamed granite of Eastern Piedmont (Carboniferous to Permian) at surface, covers < 0.1 % of this area

Unnamed granite of Eastern Piedmont

Granite - Johnson pluton (gneissic sheets) (Carboniferous to Permian) at surface, covers < 0.1 % of this area

Granite - Johnson pluton (gneissic sheets)

Diorite-gabbro - Clouds Creek pluton (Carboniferous) at surface, covers < 0.1 % of this area

Diorite-gabbro - Clouds Creek pluton

Syenite - Buffalo pluton (Devonian to Silurian) at surface, covers < 0.1 % of this area

Syenite - Buffalo pluton

Gabbro - Abbeville pluton (Devonian to Silurian) at surface, covers < 0.1 % of this area

Gabbro - Abbeville pluton

Metagraywacke/ Mica Schist (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area

Metagraywacke/ Mica Schist

Gabbro - Chester pluton (Devonian to Silurian) at surface, covers < 0.1 % of this area

Gabbro - Chester pluton

Atlantic Coastal Plain deposit, undivided (Tertiary and Cretaceous) at surface, covers < 0.1 % of this area

Undivided sediments

Hammett Grove Meta-igneous Suite - ultramafic rocks (Paleozoic or Neoproterozoic) at surface, covers < 0.1 % of this area

Metamorphosed ultramafic rocks: hornblendite, pyroxenite, serpentinite and talc schist

Aeolian Sand Deposits (Holocene) at surface, covers < 0.1 % of this area

Holocene dune sand, parabolic.

Middendorf Formation (Cretaceous) at surface, covers < 0.1 % of this area

Sand, sandstone, and mudstone, gray to pale gray with an orange cast, mottled; clay balls and iron-cemented concretions common, beds laterally discontinuous, cross-bedding common.

Syenite - Mount Carmel pluton (Devonian to Silurian) at surface, covers < 0.1 % of this area

Syenite - Mount Carmel pluton

Metavolcanic rocks, interlayered felsic to mafic, undivided (Ordovician to Neoproterozoic) at surface, covers < 0.1 % of this area

Metavolcanic rocks, interlayered felsic to mafic, undivided

Ultramafic rock (Paleozoic or Neoproterozoic) at surface, covers < 0.1 % of this area

Ultramafic rock

Hammett Grove Meta-igneous Suite - metagabbro (Paleozoic or Neoproterozoic) at surface, covers < 0.1 % of this area

Hammett Grove Meta-igneous Suite - metagabbro

Stream alluvium (Quaternary) at surface, covers < 0.1 % of this area

Stream alluvium and undifferentiated terrace deposits

Garnet-Mica Schist (Cambrian/Late Proterozoic) at surface, covers < 0.1 % of this area

Interlayered with amphibolite.

Porphyroblastic Gneiss (Cambrian/Late Proterozoic) at surface, covers < 0.1 % of this area

Massive to foliated, granodioritic, migmatitic.

Metamudstone and Meta-Argillite (Cambrian/Late Proterozoic) at surface, covers < 0.1 % of this area

Thin to thick bedded; bedding plane and axial-planar cleavage common; interbedded with metasandstone, metaconglomerate, and metavolcanic rock.

Tallulah Falls Formation, amphibolite (Neoproterozoic) at surface, covers < 0.1 % of this area

Tallulah Falls Formation, amphibolite

Gabbro - Mecklenburg pluton (Devonian to Silurian) at surface, covers < 0.1 % of this area

Gabbro - Mecklenburg pluton

Henderson Gneiss (Cambrian) at surface, covers < 0.1 % of this area

Monzonitic to granodioritic; inequigranular.

Aluminous Schist (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area

Aluminous Schist

Caesars Head Granite Gneiss (Devonian/Silurian) at surface, covers < 0.1 % of this area

Equigranular to porphyritic, massive to well foliated; contains biotite and muscovite.

Inequigranular Biotite Gneiss (Cambrian/Late Proterozoic) at surface, covers < 0.1 % of this area

Weakly foliated to massive, contains plagioclase megacrysts and, rarely, larger megacrysts of quartz and feldspar.

Mica Schist (Cambrian/Late Proterozoic) at surface, covers < 0.1 % of this area

Garnet, staurolite, kyanite, or sillimanite occur locally; lenses and layers of quartz schist, micaceous quartzite, calc-silicate rock, biotite gneiss, amphibolite, and phyllite.

Pamlico shoreline complex - marsh and lagoonal facies (Pleistocene) at surface, covers < 0.1 % of this area

Pamlico shoreline complex - marsh and lagoonal facies

Metamorphosed Mafic Rock (Paleozoic/Late Proterozoic) at surface, covers < 0.1 % of this area

Metagabbro, metadiorite, and mafic plutonic-volcanic complexes.

Burkes Mountain complex, amphibolite (Cambrian and/or Neoproterozoic) at surface, covers < 0.1 % of this area

Burkes Mountain complex, amphibolite

Cherryville Granite (Mississippian) at surface, covers < 0.1 % of this area

Massive to weakly foliated; contains pegmatites, lithium-bearing on east side.

Burkes Mountain complex, ultramafic rock (Cambrian or Neoproterozoic) at surface, covers < 0.1 % of this area

Burkes Mountain complex, ultramafic rock

Gabbro - North York pluton (Devonian to Silurian) at surface, covers < 0.1 % of this area

Gabbro - North York pluton

Granite Gneiss (Silurian/Ordovician) at surface, covers < 0.1 % of this area

Poorly foliated; interlayered with biotite augen gneiss.

Ashe Metamorphic Suite and Tallulah Falls Formation; Biotite gneiss (Late Proterozoic) at surface, covers < 0.1 % of this area

Interlayered with biotite-garnet gneiss, biotite-muscovite schist, garnet-mica schist, and amphibolite.

Migmatitic Granitic Gneiss (Ordovician/Cambrian) at surface, covers < 0.1 % of this area

Foliated to massive, granitic to quartz dioritic; biotite gneiss and amphibolite common.

Blacksburg Formation (Cambrian/Late Proterozoic) at surface, covers < 0.1 % of this area

Sericite schist, locally with graphite, phyllite with sericite quartzite, banded marble, amphibolite, and minor calc-silicate rock.

Battleground Formation (Late Proterozoic) at surface, covers < 0.1 % of this area

Quartz-sericite schist with metavolcanic rock, quartz-pebble metaconglomerate, kyanite-sillimanite quartzite, and garnet-quartz rock.

Peedee Formation (Cretaceous) at surface, covers < 0.1 % of this area

Sand, clayey sand, and clay, greenish gray to olive black, massive, glauconitic, locally fossiliferous and calcareous. Patches of sandy molluscan-mold limestone in upper part.

Metamorphosed Mafic Rock (Paleozoic/Late Proterozoic) at surface, covers < 0.1 % of this area

Metagabbro, metadiorite, and mafic plutonic-volcanic complexes.

Toxaway Gneiss (Middle Proterozoic) at surface, covers < 0.1 % of this area

Unconformity; poorly foliated to well-foliated; equigranular to inequigranular, granitic.

Sillimanite Schist (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area

Sillimanite Schist

Rocks of Brevard Fault Zone (Uncertain, possibly Permian or Devonian) at surface, covers < 0.1 % of this area

"Fish scale" schist and phyllonite, graphitic; interlayered with feldspathic metasandstone, marble lenses.

Biotite Gneiss and Schist (Cambrian/Late Proterozoic) at surface, covers < 0.1 % of this area

Inequigranular, locally abundant potassic feldspar and garnet; interlayered and gradational with calc-silicate rock, sillimanite-mica schist, mica schist, and amphibolite. Contains small masses of granitic rock.

Metamorphosed Granitic Rock (Cambrian/Late Proterozoic) at surface, covers < 0.1 % of this area

Megacrystic, well foliated; locally contains hornblende. Chapel Hill, Chatham, Farrington, Meadow Flats, Mt. Moriah, Parks Crossroads plutons, and Roxboro and Vance County suites.

Metamorphosed Quartz Diorite (Paleozoic/Late Proterozoic) at surface, covers < 0.1 % of this area

Foliated to massive.

Ashe Metamorphic Suite and Tallulah Falls Formation; Amphibolite (Late Proterozoic) at surface, covers < 0.1 % of this area

Equigranular, massive to well foliated, interlayered, rarely discordant, metamorphosed intrusive to extrusive mafic rock; may include metasedimentary rock.

Pamlico shoreline complex - barrier island facies (Pleistocene) at surface, covers < 0.1 % of this area

Pamlico shoreline complex - barrier island facies

Amphibolite/ Biotitic Gneiss/ Quartz Sericite Schist (Precambrian-Paleozoic) at surface, covers < 0.1 % of this area

Amphibolite/ Biotitic Gneiss/ Quartz Sericite Schist

Surficial Deposits, Undivided (Quaternary) at surface, covers < 0.1 % of this area

Sand, clay, gravel, and peat deposited in marine, fluvial, eolian, and lacustrine environments. Quaternary deposits not shown at altitudes greater than approx. 205 feet above mean sea level (Suffolk Scarp, in part).

Metamorphosed Granitic Rock (Cambrian/Late Proterozoic) at surface, covers < 0.1 % of this area

Megacrystic, well foliated; locally contains hornblende.

Waccamaw Formation (Tertiary) at surface, covers < 0.1 % of this area

Fossiliferous sand with silt and clay, bluish-gray to tan, loosely consolidated. Straddles Pleistocene-Pliocene boundary.