The Macon 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
Mostly sunny
Partly cloudy
Mostly sunny
Mostly sunny
Mostly sunny
Macon’s center stands about 200 ft above sea level. Within three miles the land runs from 170 ft to 260 ft, a difference of 90 ft: gently rolling country. The highest named summit within 15 miles is White House Mountain, about 600 ft, 14 miles south-southwest.
Under the town center the state geologic map shows Demopolis chalk, from the Late Cretaceous, 66 to 100 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 60×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Chalk. Age: Late Cretaceous, 66 to 100 million years old. About 12 mi of the line.
Clay. Age: Paleocene, 56 to 66 million years old. About 5 mi of the line.
Limestone. Age: Paleocene, 56 to 66 million years old. About 2 mi of the line.
Chalk, clay. Age: Late Cretaceous, 66 to 100 million years old. About 2 mi of the line.
Sand, clay, limestone. Age: Late Cretaceous, 66 to 100 million years old. About 1 mi of the line.
Chalk, clay. Age: Late Cretaceous, 66 to 100 million years old. 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 Macon reaches Mobile Bay and the Gulf of America by way of Cedar Creek, the Noxubee, the Tombigbee and the Mobile: about 340 river miles.
220 miles of the trip are on the Tombigbee.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Macon; river miles along the main stem, rounded.
