The Grant 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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Partly cloudy
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Showers likely; cooler
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Grant’s center stands about 5,800 ft above sea level. Within three miles the land runs from 5,690 ft to 6,190 ft, a difference of 500 ft: hilly country. The highest named summit within 15 miles is Maiden Peak, about 10,190 ft, 13 miles south-southwest.
The section below crosses 8 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.
Sedimentary. Age: Tertiary, 2.6 to 66 million years old. About 9 mi of the line.
Gneiss. Age: Archean to Paleoproterozoic. About 4 mi of the line.
Limestone. Age: Early Mississippian to Early Pennsylvanian, 315 to 359 million years old. About 3 mi of the line.
Conglomerate, limestone, sandstone. Age: Late Cretaceous to Early Paleocene, 62 to 84 million years old. About 2 mi of the line.
Age: Pleistocene to Holocene, less than 1.8 million years old. About 2 mi of the line.
Dolostone, sandstone, limestone. Age: Early Pennsylvanian to Permian, 252 to 324 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. 2 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 Grant reaches the Gulf of America by way of Barrett Creek, Horse Prairie Creek, the Beaverhead, the Jefferson, the Missouri and the Mississippi: about 3,640 river miles.
Lakes on the way: Lake Oahe, Lake Sakakawea, Lake Fort Peck and Lake Sharpe.
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 Grant; river miles along the main stem, rounded.
