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Geologic units in Edgefield county, South Carolina

Huber/Lisbon/Barnwell Formations, undivided (Eocene) at surface, covers 30 % of this area

Huber/Lisbon/Barnwell Formations, undivided: 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.

Migmatite paragneiss and schist of Kiokee belt (Cambrian or Neoproterozoic) at surface, covers 25 % of this area

Migmatite paragneiss and schist of Kiokee belt: migmatitic hornblende-biotite paragneiss having interlayered sillimanite schist and amphibolite

Richtex Formation (Ordovician to Middle Cambrian) at surface, covers 25 % of this area

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

Mylonitic rocks of Modoc Fault Zone (Late Paleozoic) at surface, covers 10 % of this area

Mylonitic rocks of Modoc Fault Zone: mylonite gneiss

Lithology: mylonite

Asbill Pond Formation (Middle Cambrian) at surface, covers 2 % of this area

Asbill Pond Formation: metamorphosed siltstones and sandstones having interbedded felsic to mafic metavolcanic rocks

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

Granite

Lithology: granite

Granite- Cuffytown Creek pluton (Carboniferous to Permian) at surface, covers 1 % of this area

Granite- Cuffytown Creek pluton

Lithology: granite

Metavolcanic and metasedimentary rocks of Bel Air Belt (Ordovician to Neoproterozoic) at surface, covers 1 % of this area

Metavolcanic and metasedimentary rocks of Bel Air Belt

Granite- Edgefield pluton (Carboniferous to Permian) at surface, covers 1 % of this area

Granite- Edgefield pluton

Lithology: granite

Unnamed granite of Eastern Piedmont (Carboniferous to Permian) at surface, covers 0.9 % of this area

Unnamed granite of Eastern Piedmont

Lithology: granite

Granite- Johnson pluton (gneissic sheets) (Carboniferous to Permian) at surface, covers 0.9 % of this area

Granite- Johnson pluton (gneissic sheets)

Lithology: granite