USGS OFR 2008-1206: Coastal Change Along the Shore of Northeastern South Carolina: The South Carolina Coastal Erosion Study, Table 3.2

U.S. Geological Survey Open-File Report 2008-1206

Coastal Change Along the Shore of Northeastern South Carolina: The South Carolina Coastal Erosion Study

Table 3.2. Table describing three general scales of influence on the geologic evolution of the Grand Strand.

SCALE	MARGIN	PLATFORM	COASTAL
Spatial influence	U.S. Atlantic Margin (thousands of kilometers)	Carolina Platform (hundreds of kilometers)	Coastal Zone (less than hundreds of kilometers)
Temporal influence	Millions of years	Tens to hundreds of thousand years	Less than ten thousand years
Geologic and geomorphologic influence	Margin basement structures (platforms and embayments); long-term patterns of infill and erosion	Emergent-submergent events; repeated subearial and marine erosion; Pee Dee River migration; changes in sediment supply	Coastal landforms and morphologies; changes in sediment supply
Dominant processes	Tectonics - differential subsidence; global climate and sea-level changes	Global climate and sea-level changes; fluvial, tidal, current, and wave energy; differential erosion	Tidal, current and wave energy; differential erosion
Grand Strand framework characteristics	Predisposition to sediment limitation; shallow, truncated cretaceous and tertiary sedimentary rocks	Pleistocene shoreline units; paleochannels and fills; erosional unconformities	Holocene shoreline units; modern coastal features; erosional unconformities

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