The Camp Swift 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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Camp Swift’s center stands about 460 ft above sea level. Within three miles the land runs from 400 ft to 570 ft, a difference of 170 ft: gently rolling country. The highest named summit within 15 miles is Yegua Knobbs, about 740 ft, 12 miles north-northeast.
Under the town center the state geologic map shows Calvert Bluff Formation (claystone), from the Late Paleocene to Early Eocene, 48 to 59 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 60×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Claystone. Age: Late Paleocene to Early Eocene, 48 to 59 million years old. About 8 mi of the line.
Sandstone. Age: Eocene, 34 to 56 million years old. About 3 mi of the line.
Sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 3 mi of the line.
Claystone, sandstone. Age: Eocene, 34 to 56 million years old. About 2 mi of the line.
Sand. Age: Paleocene, 56 to 66 million years old. About 2 mi of the line.
Sandstone. Age: Eocene, 34 to 56 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 Camp Swift reaches the Gulf of America by way of Piney Creek and the Colorado: about 240 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Camp Swift; river miles along the main stem, rounded.
