The Louin 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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Louin’s center stands about 430 ft above sea level. Within three miles the land runs from 320 ft to 480 ft, a difference of 160 ft: gently rolling country. The highest named summit within 15 miles is Walk Hill, about 670 ft, 14 miles north-northwest.
Under the town center the state geologic map shows Forest Hill formation and Red Bluff clay (sand, clay), from the Oligocene, 23 to 34 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 59×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sand, clay. Age: Oligocene, 23 to 34 million years old. About 12 mi of the line.
Clay. Age: Eocene, 34 to 56 million years old. About 9 mi of the line.
Limestone. Age: Oligocene, 23 to 34 million years old. About 3 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 Louin reaches the Gulf of America by way of West Tallahala Creek, the Leaf, the Pascagoula and the West Pascagoula: about 230 river miles.
140 miles of the trip are on the Leaf.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Louin; river miles along the main stem, rounded.
