USGS Home
Contact USGS
Search USGS

Mineral Resources > Online Spatial Data > Geology > by state > South Carolina Geology

Geologic units in Lancaster county, South Carolina

Amphibolite and amphibolite gneiss (Paleozoic to Neoproterozoic) at surface, covers 2 % of this area

Amphibolite and amphibolite gneiss

Lithology: amphibolite; gneiss

Richtex Formation (Ordovician to Middle Cambrian) at surface, covers 0.5 % of this area

Richtex Formation: laminated metamudstone; contains Middle Cambrian or younger sponge spicules

Lithology: metasedimentary rock

Granite- Liberty Hill pluton (Carboniferous to Permian) at surface, covers 12 % of this area

Granite- Liberty Hill pluton

Lithology: granite

Granite- Pageland pluton (Carboniferous to Permian) at surface, covers 2 % of this area

Granite- Pageland pluton

Lithology: granite

Tuffaceous metasiltstone (Early Paleozoic-Neoproterozoic) at surface, covers 1 % of this area

Tuffaceous metasiltstone

Lithology: metasedimentary rock

Metamorphosed granite and granodiorite (Cambrian or Neoproterozoic) at surface, covers 7 % of this area

Metamorphosed granite and granodiorite

Lithology: granite; granodiorite

Felsic metavolcanic rocks and felsic gneiss interpreted to the metavolcanics (Ordovician to Neoproterozoic) at surface, covers 3 % of this area

Felsic metavolcanic rocks and felsic gneiss interpreted to the metavolcanics

Lithology: felsic metavolcanic rock; gneiss

Great Falls metagranite (Cambrian or Neoproterozoic) at surface, covers 2 % of this area

Great Falls metagranite: foliated, metamorphosed muscovite-biotite granite having accessory garnet and discordantly intruding surrounding rocks

Lithology: granite

Metagabbro and minor metadiorite (Middle Paleozoic to Neoproterozoic) at surface, covers 0.3 % of this area

Metagabbro and minor metadiorite

Lithology: gabbro

Alluvial Valley Swamp (Quaternary) at surface, covers 0.5 % of this area

Alluvial Valley Swamp: 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.

Lithology: sand; gravel; silt; peat

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

Metamorphosed Mafic Rock - metagabbro, metadiorite, and mafic plutonic-volcanic complexes.

Lithology: metamorphic rock

Waxhaw metagranite (Ordovician to Cambrian) at surface, covers 3 % of this area

Waxhaw metagranite: 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

Lithology: granite

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

Lithology: mafic metavolcanic rock; gneiss; amphibolite

Phyllonite and phyllonitic schist (Late Paleozoic) at surface, covers 3 % of this area

Phyllonite and phyllonitic schist

Lithology: phyllonite; schist

Pleasant Hill metagranite (Cambrian or Neoproterozoic) at surface, covers 2 % of this area

Pleasant Hill metagranite: possibly similar to nearby Great Falls metagranite

Lithology: granite

Cid Formation, Mudstone Member (Ordovician to Late Cambrian) at surface, covers 3 % of this area

Cid Formation, Mudstone Member: thin bedded tuffaceous metasiltstone

Lithology: metasedimentary rock

Metadiorite (Cambrian or Neoproterozoic) at surface, covers 2 % of this area

Metadiorite

Lithology: diorite

Peedee Formation /Black Creek Group, undivided (Cretaceous) at surface, covers 8 % of this area

Peedee Formation /Black Creek Group, undivided

Lithology: clay or mud; sand; limestone

Persimmon Fork Formation (Cambrian to Neoproterozoic) at surface, covers 47 % of this area

Persimmon Fork Formation: predominately metatuff

Lithology: metavolcanic rock

Granite (Carboniferous to Permian) at surface, covers 0.6 % of this area

Granite

Lithology: granite

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

Metamorphosed Granitic Rock (520-650 my) - megacrystic, well foliated, locally contains hornblende; Fountain intrusive.

Lithology: metamorphic rock