The Culloden 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.
Culloden’s center stands about 690 ft above sea level. Within three miles the land runs from 530 ft to 730 ft, a difference of 200 ft: rolling country. The highest named summit within 15 miles is Hog Mountain, about 1,020 ft, 14 miles north-northwest.
Under the town center the state geologic map shows Mica Schist/ Gneiss/ Amphibolite (gneiss, mica-schist, amphibolite), from the Precambrian to Paleozoic.
The section below crosses 4 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 47×. 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. Age: Precambrian to Paleozoic. About 9 mi of the line.
Biotite-gneiss. Age: Precambrian to Paleozoic. About 8 mi of the line.
Gneiss, mica-schist, amphibolite. Age: Precambrian to Paleozoic. About 5 mi of the line.
Clay, sand. Age: Cretaceous, 66 to 145 million years old. About 2 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.
Culloden straddles the Eastern Continental Divide. Rain on the east side runs to the Atlantic Ocean; most of the rest goes to the Gulf of America.
From the center of town, a raindrop reaches the Gulf of America by way of Auchumpkee Creek, the Flint and the Apalachicola: about 360 river miles. One that lands on the east side reaches the Atlantic Ocean by way of Tanyard Creek, Echeconnee Creek, the Ocmulgee and the Altamaha: about 350 river miles.
230 miles of the trip are on the Flint.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Culloden; river miles along the main stem, rounded.