The Deaver 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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70° on Nov. 13, 1999, the hottest reading for this week of the year since 1916. Next is 69° in 1934.
Deaver’s center stands about 4,110 ft above sea level. Within three miles the land runs from 4,030 ft to 4,510 ft, a difference of 480 ft: hilly country. The highest named summit within 15 miles is Penney Peak, about 5,000 ft, 14 miles northeast.
Under the town center the state geologic map shows Alluvium and Colluvium (clay, silt, sand), from the Pleistocene to Holocene, less than 2.6 million 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 17×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Gravel. Age: Pleistocene to Holocene, less than 2.6 million years old. About 8 mi of the line.
Clay, silt, sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 7 mi of the line.
Shale, siltstone. Age: Late Cretaceous, 78 to 83 million years old. About 5 mi of the line.
Sandstone, shale. Age: Late Cretaceous, 66 to 100 million years old. About 2 mi of the line.
Sandstone, shale. Age: Late Cretaceous, 66 to 100 million years old. About 1 mi of the line.
Sandstone, shale. Age: Paleocene, 56 to 66 million years old. About 0.9 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.
A raindrop that lands in Deaver reaches the Gulf of America by way of Polecat Creek, Sage Creek, the Shoshone, the Bighorn, the Yellowstone, the Missouri and the Mississippi: about 3,210 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 Deaver; river miles along the main stem, rounded.
Deaver has a cold desert climate. Summer afternoons average 89° in July; winter nights fall to about 6° in January. A normal year brings about 12 inches of snow; with the rain, that comes to about 6 inches of water.
On November 14 Deaver normally reaches 46° and falls to 20°. The record high is 69°, in 1934; the record low −18°, in 1959. The most rain on this date, 0.16 in, fell in 1958.
Normals 1991–2020 and records since 1916 at Deaver, here. NOAA, through RCC-ACIS.
