Peedee Formation - Black Creek Group, undivided
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.
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.
Thin bedded tuffaceous metasiltstone
Laminated metamudstone; contains Middle Cambrian or younger sponge spicules
Coastal terrace of Carolinas. Pliocene equivalent to Yorktown. Deeply weathered.
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.
Conglomerate, sandstone and mudstone
Crystal and lithic metatuff of rhyolite to rhyodacite composition
Granite - Pageland pluton
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.
Low coastal formation in Carolinas like Penholoway but younger and lower in altitude.
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.
Thin to thick bedded; bedding plane and axial-planar cleavage common; interbedded with metasandstone, metaconglomerate, and metavolcanic rock.