The Hannahs Mill 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.
Sunny
Mostly sunny; warmer
Partly cloudy
Sunny
Sunny
Mostly sunny
Mostly sunny
Hannahs Mill’s center stands about 760 ft above sea level. Within three miles the land runs from 630 ft to 880 ft, a difference of 250 ft: rolling country. The highest named summit within 15 miles is Betts Mountain, about 1,290 ft, 13 miles west.
Under the town center the state geologic map shows Granitic Gneiss undifferentiated, from the Precambrian to Paleozoic.
The section below crosses 8 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 23×. 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 6 mi of the line.
Gneiss, mica-schist, amphibolite. Age: Precambrian to Paleozoic. About 5 mi of the line.
Schist. Age: Precambrian to Paleozoic. About 3 mi of the line.
Age: Precambrian to Paleozoic. About 2 mi of the line.
Gneiss. Age: Precambrian to Paleozoic. About 2 mi of the line.
Mica-schist. Age: Precambrian to Paleozoic. 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. 2 smaller units along the line are not listed.
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 Hannahs Mill reaches the Gulf of America by way of Potato Creek, the Flint and the Apalachicola: about 370 river miles.
240 miles of the trip are on the Flint.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Hannahs Mill; river miles along the main stem, rounded.
