The Washington 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.
Washington’s center stands about 610 ft above sea level. Within three miles the land runs from 460 ft to 640 ft, a difference of 180 ft: gently rolling country. The highest named summit within 15 miles is Graves Mountain, about 860 ft, 13 miles east.
Under the town center the state geologic map shows Epidote Quartzite/ Amphibolite/ Sericite Schist/ Biotite Granite Gneiss (quartzite, amphibolite, mica-schist), from the Precambrian to Paleozoic.
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 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.
Gneiss, amphibolite. Age: Precambrian to Paleozoic. About 8 mi of the line.
Metavolcanic. Age: Precambrian to Paleozoic. About 7 mi of the line.
Age: Precambrian to Paleozoic. About 5 mi of the line.
Gneiss. Age: Precambrian to Paleozoic. About 2 mi of the line.
Granite. Age: Precambrian to Paleozoic. About 2 mi of the line.
Quartzite, amphibolite, mica-schist. Age: Precambrian to Paleozoic. About 1 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 Washington reaches the Atlantic Ocean by way of Rocky Creek, the Little River and the Savannah: about 260 river miles.
220 miles of the trip are on the Savannah.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Washington; river miles along the main stem, rounded.