The Milner 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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Milner’s center stands about 840 ft above sea level. Within three miles the land runs from 710 ft to 870 ft, a difference of 160 ft: gently rolling country. The highest named summit within 15 miles is Indian Grave Mountain, about 1,260 ft, 12 miles southwest.
Under the town center the state geologic map shows Biotite Gneiss/ Feldspathic Biotite Gneiss, from the Precambrian to Paleozoic.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 29×. 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 14 mi of the line.
Mica-schist. Age: Precambrian to Paleozoic. About 5 mi of the line.
Amphibolite, biotite-gneiss, mica-schist. Age: Precambrian to Paleozoic. About 3 mi of the line.
Age: Precambrian to Paleozoic. About 2 mi of the line.
Gneiss, mica-schist, amphibolite. Age: Precambrian to Paleozoic. About 0.5 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 Milner reaches the Atlantic Ocean by way of Prairie Creek, the Little Towaliga, the Towaliga, the Ocmulgee and the Altamaha: about 380 river miles.
220 miles of the trip are on the Ocmulgee.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Milner; river miles along the main stem, rounded.
