The Double Spring 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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Double Spring’s center stands about 6,620 ft above sea level. Within three miles the land runs from 5,670 ft to 7,810 ft, a difference of 2,140 ft: mountain country. The highest named summit within 15 miles is Jobs Peak, about 10,570 ft, 14 miles west-northwest.
Under the town center the state geologic map shows Younger andesite and intermediate flows and breccias (andesite, dacite), from the Miocene, 5.3 to 23 million years old.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 5×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Andesite, basalt. Age: Late Oligocene to Pleistocene, 2 to 24 million years old. About 9 mi of the line.
Volcanic, carbonate, clastic. Age: Middle Triassic to Middle Jurassic, 164 to 247 million years old. About 6 mi of the line.
Andesite, dacite. Age: Miocene, 5.3 to 23 million years old. About 4 mi of the line.
Granodiorite, granite. Age: Cretaceous, 66 to 145 million years old. About 3 mi of the line.
Coarse-detrital, fine-detrital. Age: Pleistocene to Holocene, less than 2.6 million years old. About 2 mi of the line.
Andesite. Age: Late Oligocene to Pleistocene, 2 to 24 million years old. About 0.3 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 Double Spring reaches the Great Basin by way of Bryant Creek, the East Fork Carson and the Carson: about 150 river miles. The Great Basin has no outlet to the sea: the water leaves only by evaporating or soaking into the ground.
Lake on the way: Lahontan Reservoir.
65 miles of the trip are on the Carson.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Double Spring; river miles along the main stem, rounded.
