The Bay Springs 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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Bay Springs’s center stands about 430 ft above sea level. Within three miles the land runs from 320 ft to 490 ft, a difference of 170 ft: gently rolling country.
Under the town center the state geologic map shows Catahoula formation (sand), from the Miocene, 5.3 to 23 million years old.
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 64×. 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. Age: Miocene, 5.3 to 23 million years old. About 12 mi of the line.
Sand, clay. Age: Oligocene, 23 to 34 million years old. About 7 mi of the line.
Clay. Age: Eocene, 34 to 56 million years old. About 3 mi of the line.
Limestone. Age: Oligocene, 23 to 34 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.
A raindrop that lands in Bay Springs reaches the Gulf of America by way of Etehomo Creek, Big Creek, the Leaf, the Pascagoula and the West Pascagoula: about 210 river miles.
100 miles of the trip are on the Leaf.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Bay Springs; river miles along the main stem, rounded.
