The Tishomingo 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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Tishomingo’s center stands about 680 ft above sea level. Within three miles the land runs from 630 ft to 790 ft, a difference of 160 ft: gently rolling country. The highest named summit within 15 miles is Lookout Mountain, about 1,090 ft, 11 miles north.
Under the town center the state geologic map shows Woodford Shale (black-shale), from the Late Devonian, 359 to 384 million years old.
The section below crosses 10 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 42×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Black-shale. Age: Late Devonian, 359 to 384 million years old. About 7 mi of the line.
Granite. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 6 mi of the line.
Sandstone. Age: Early Cretaceous, 100 to 145 million years old. About 3 mi of the line.
Limestone, shale, marlstone. Age: Early Cretaceous, 100 to 145 million years old. About 2 mi of the line.
Limestone, conglomerate, dolostone. Age: Early Ordovician, 471 to 487 million years old. About 2 mi of the line.
Claystone. Age: Early Cretaceous, 100 to 145 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. 4 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 Tishomingo reaches the Gulf of America by way of Pennington Creek, the Washita, the Red River, the Atchafalaya and the Lower Atchafalaya: about 850 river miles.
680 miles of the trip are on the Red River.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Tishomingo; river miles along the main stem, rounded.
