The Terral 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.
Chance of showers
Showers likely
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Sunny
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Chance of showers
Partly cloudy
Terral’s center stands about 850 ft above sea level. Within three miles the land runs from 780 ft to 960 ft, a difference of 180 ft: gently rolling country. The highest named summit within 15 miles is Blue Mound, about 1,020 ft, 14 miles east-southeast.
The section below crosses 5 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.
Coarse-detrital, fine-detrital. Age: Pleistocene, less than 2.6 million years old. About 11 mi of the line.
Claystone. Age: Permian, 252 to 299 million years old. About 10 mi of the line.
Fine-detrital. Age: Holocene, less than 12,000 years old. About 1 mi of the line.
Shale, sandstone, conglomerate. Age: Permian, 252 to 299 million years old. About 1 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 0.4 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 Terral reaches the Gulf of America by way of the Red River, the Atchafalaya and the Lower Atchafalaya: about 970 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Terral; river miles along the main stem, rounded.
