The Valentine 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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Valentine’s center stands about 4,440 ft above sea level. Within three miles the land runs from 4,340 ft to 4,550 ft, a difference of 210 ft: rolling country. The highest named summit within 15 miles is Spring Mountain, about 6,720 ft, 13 miles northeast.
Under the town center the state geologic map shows Alluvium (fine-detrital, coarse-detrital), from the Holocene, less than 12,000 years old.
The section below crosses 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 16×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 13 mi of the line.
Coarse-detrital. Age: Pleistocene to Holocene, less than 2.6 million years old. About 6 mi of the line.
Basalt. Age: Oligocene, 23 to 34 million years old. About 3 mi of the line.
Rhyolite. Age: Eocene to Oligocene, 23 to 56 million years old. About 0.9 mi of the line.
Rhyolite, trachyte. Age: Late Eocene, 34 to 38 million years old. About 0.6 mi of the line.
Trachyte, rhyolite. Age: Late Eocene, 34 to 38 million years old. About 0.5 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 1 smaller unit 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.
