The Shuqualak 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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Shuqualak’s center stands about 220 ft above sea level. Within three miles the land runs from 180 ft to 290 ft, a difference of 110 ft: gently rolling country. The highest named summit within 15 miles is White House Mountain, about 600 ft, 6 miles southwest.
Under the town center the state geologic map shows Prairie Bluff chalk and Owl Creek formation (chalk, clay), 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 41×. 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 9 mi of the line.
Sand, clay. Age: Eocene, 34 to 56 million years old. About 5 mi of the line.
Clay. Age: Paleocene, 56 to 66 million years old. About 4 mi of the line.
Limestone. Age: Paleocene, 56 to 66 million years old. About 3 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.
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 Shuqualak reaches Mobile Bay and the Gulf of America by way of Shuqualak Creek, the Noxubee, the Tombigbee and the Mobile: about 320 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 Shuqualak; river miles along the main stem, rounded.
