The Crowheart 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.
Mostly sunny
Mostly sunny; warmer
Partly cloudy
Showers likely
Mostly sunny; cooler
Showers likely
Showers likely
Crowheart’s center stands about 6,080 ft above sea level. Within three miles the land runs from 5,820 ft to 6,590 ft, a difference of 770 ft: hilly country. The highest named summit within 15 miles is Bold Mountain, about 10,660 ft, 11 miles southwest.
Under the town center the state geologic map shows Gravel, pediment, and fan deposits, from the Pleistocene to Holocene, less than 2.6 million years old.
The section below crosses 12 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.
Claystone. Age: Eocene, 34 to 56 million years old. About 7 mi of the line.
Gravel. Age: Pleistocene to Holocene, less than 2.6 million years old. About 5 mi of the line.
Clay, silt, sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 3 mi of the line.
Limestone, dolostone. Age: Late Devonian to Carboniferous, 324 to 384 million years old. About 2 mi of the line.
Clay, silt, sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 2 mi of the line.
Black-shale, sandstone, dolostone. Age: Permian, 252 to 299 million 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. 6 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 Crowheart reaches the Gulf of America by way of the Wind River, the Bighorn, the Yellowstone, the Missouri and the Mississippi: about 3,430 river miles.
Lakes on the way: Lake Oahe, Lake Sakakawea, Lake Sharpe and Lake Francis Case.
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 Crowheart; river miles along the main stem, rounded.
