The Encampment 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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Encampment’s center stands about 7,320 ft above sea level. Within three miles the land runs from 7,090 ft to 8,240 ft, a difference of 1,150 ft: steep hill country. The highest named summit within 15 miles is Bridger Peak, about 10,970 ft, 12 miles west.
Under the town center the state geologic map shows Upper Miocene Rocks (sandstone, claystone, conglomerate), from the Late Miocene, 5.3 to 12 million years old.
The section below crosses 9 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.
Sandstone, claystone, conglomerate. Age: Late Miocene, 5.3 to 12 million years old. About 8 mi of the line.
Gneiss, amphibolite, pelitic-schist. Age: Paleoproterozoic, 1.6 to 2.5 billion years old. About 4 mi of the line.
Clay, silt, sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 3 mi of the line.
Gneiss. Age: Archean. About 3 mi of the line.
Granitic. Age: Paleoproterozoic, 1.6 to 2.5 billion years old. About 2 mi of the line.
Quartzite, mixed-clastic, pelitic-schist. Age: Paleoproterozoic, 1.6 to 2.5 billion years old. About 1 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 3 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 Encampment reaches the Gulf of America by way of the Encampment, the North Platte, the Platte, the Missouri and the Mississippi: about 2,700 river miles.
Lakes on the way: Seminoe Reservoir and Pathfinder Reservoir.
1,170 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Encampment; river miles along the main stem, rounded.
