The Granton 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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−8° on Nov. 13, 1986, the coldest reading for this week of the year since 1893. Next is −7° in 1916.
Granton’s center stands about 1,130 ft above sea level. Within three miles the land runs from 1,080 ft to 1,280 ft, a difference of 200 ft: gently rolling country. The highest named summit within 15 miles is Christie Mound, about 1,320 ft, 9 miles northwest.
Under the town center the state geologic map shows Gneiss, migmatite, and amphibolite, from the Mesoarchean to Neoarchean, 2.5 to 2.9 billion years old.
The section below crosses 2 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 47×. 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. Age: Cambrian, 487 to 542 million years old. About 20 mi of the line.
Gneiss. Age: Mesoarchean to Neoarchean, 2.5 to 2.9 billion years old. About 4 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 Granton reaches the Gulf of America by way of South Branch O'Neill Creek, O'Neill Creek, the Black River, the Dodge Chute and the Mississippi: about 1,790 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Granton; river miles along the main stem, rounded.
Granton has a warm-summer humid continental climate. Summer afternoons average 80° in July; winter nights fall to about 5° in January. A normal year brings about 44 inches of snow; with the rain, that comes to about 36 inches of water.
On November 14 Granton normally reaches 43° and falls to 25°. The record high is 70°, in 1999; the record low −7°, in 1916. The most rain on this date, 1.26 in, fell in 1902.
Normals 1991–2020 and records since 1893 at Neillsville 3 ESE, 5 miles southwest. NOAA, through RCC-ACIS.
