The Valliant 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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Valliant’s center stands about 520 ft above sea level. Within three miles the land runs from 430 ft to 560 ft, a difference of 130 ft: gently rolling country. The highest named summit within 15 miles is Bull Mountain, about 840 ft, 12 miles northwest.
Under the town center the state geologic map shows Goodland Limestone and Walnut Clay, from the Early Cretaceous, 100 to 145 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 56×. 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: Pleistocene to Holocene, less than 2.6 million years old. About 6 mi of the line.
Sandstone. Age: Early Cretaceous, 100 to 145 million years old. About 5 mi of the line.
Fine-detrital. Age: Holocene, less than 12,000 years old. About 3 mi of the line.
Shale. Age: Early Cretaceous, 100 to 145 million years old. About 2 mi of the line.
Coarse-detrital, fine-detrital. Age: Pleistocene, less than 2.6 million years old. About 2 mi of the line.
Chert, limestone, shale. Age: Middle Ordovician, 459 to 471 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. 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 Valliant reaches the Gulf of America by way of Garland Creek, the Red River, the Atchafalaya and the Lower Atchafalaya: about 680 river miles.
540 miles of the trip are on the Red River.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Valliant; river miles along the main stem, rounded.
