The Greenwood plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
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Greenwood’s center stands about 640 ft above sea level. Within three miles the land runs from 520 ft to 680 ft, a difference of 160 ft: gently rolling country. The highest named summit within 15 miles is Parsons Mountain, about 840 ft, 14 miles west-southwest.
Under the town center the state geologic map shows Metamorphosed granitoid rocks, undivided (metagranite), from the Neoproterozoic to Devonian, 359 to 1,000 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Biotite-gneiss. Age: Neoproterozoic to Paleozoic, 252 to 1,000 million years old. About 16 mi of the line.
Metagranite. Age: Neoproterozoic to Devonian, 359 to 1,000 million years old. About 7 mi of the line.
Gabbro. Age: Silurian to Devonian, 359 to 445 million years old. About 0.8 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
A raindrop that lands in Greenwood reaches the Atlantic Ocean by way of Stockman Branch, Coronaca Creek, Wilson Creek, Ninety Six Creek, the Saluda, the Congaree, the Santee and the South Santee: about 270 river miles.
Lakes on the way: Lib Pines Lake and Lake Murray.
70 miles of the trip are on the Santee.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Greenwood; river miles along the main stem, rounded.
