Geologic units in Kershaw county, South Carolina

Peedee Formation - Black Creek Group, undivided (Cretaceous) at surface, covers 56 % of this area

Peedee Formation - Black Creek Group, undivided

Alluvial Valley Swamp (Quaternary) at surface, covers 11 % 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.

Granite - Liberty Hill pluton (Carboniferous to Permian) at surface, covers 11 % of this area

Granite - Liberty Hill pluton

Cape Fear/Eutaw Formations (Cretaceous) at surface, covers 9 % 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.

Richtex Formation (Ordovician to Middle Cambrian) at surface, covers 6 % of this area

Laminated metamudstone; contains Middle Cambrian or younger sponge spicules

Persimmon Fork Formation (Cambrian to Neoproterozoic) at surface, covers 5 % of this area

Predominately metatuff

Mylonitic rocks of Modoc Fault Zone (Late Paleozoic) at surface, covers 1 % of this area

Mylonite gneiss

Longtown Metagranite (Neoproterozoic) at surface, covers 0.3 % of this area

Biotite metagranite

Atlantic Coastal Plain deposit, undivided (Tertiary and Cretaceous) at surface, covers 0.2 % of this area

Undivided sediments

Aeolian Sand Deposits (Holocene) at surface, covers 0.2 % of this area

Holocene dune sand, parabolic.