The Donalds 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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Donalds’s center stands about 740 ft above sea level. Within three miles the land runs from 610 ft to 800 ft, a difference of 190 ft: gently rolling country.
Under the town center the state geologic map shows Reedy River complex (gneiss), from the Paleozoic, 252 to 542 million years old.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 58×. 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 Cambrian, 487 to 1,000 million years old. About 10 mi of the line.
Gneiss. Age: Paleozoic, 252 to 542 million years old. About 7 mi of the line.
Gneiss. Age: Ordovician to Silurian, 422 to 487 million years old. About 4 mi of the line.
Gneiss. Age: Ordovician to Silurian, 422 to 487 million years old. About 3 mi of the line.
Mica-schist. Age: Neoproterozoic to Cambrian, 487 to 1,000 million years old. About 0.5 mi of the line.
Biotite-gneiss, mica-schist. Age: Neoproterozoic to Cambrian, 487 to 1,000 million years old. About 0.3 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 Donalds reaches the Atlantic Ocean by way of Gypsy Creek, Gibson Creek, Turkey Creek, the Saluda, the Congaree, the Santee and the South Santee: about 280 river miles.
Lakes on the way: Lib Pines Lake and Lake Murray.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Donalds; river miles along the main stem, rounded.
