The Gilmore City 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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77° on Nov. 11, 2012, the hottest reading for this week of the year since 1904. Next is 76° in 1999.
Gilmore City’s center stands about 1,230 ft above sea level. Within three miles the land runs from 1,160 ft to 1,230 ft, a difference of 70 ft: gently rolling country.
The section below crosses 4 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. 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-breccia, shale. Age: Late Cretaceous, 72 to 84 million years old. About 12 mi of the line.
Limestone. Age: Early Mississippian to Middle Mississippian, 331 to 359 million years old. About 9 mi of the line.
Dolostone, limestone. Age: Early Mississippian to Middle Mississippian, 331 to 359 million years old. About 3 mi of the line.
Sandstone, shale. Age: Early Cretaceous to Late Cretaceous, 94 to 113 million years old. About 0.5 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 Gilmore City reaches the Gulf of America by way of Indian Creek, the Des Moines and the Mississippi: about 1,670 river miles.
Lakes on the way: Roberts Creek and Big Creek Pounding Area.
1,330 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Gilmore City; river miles along the main stem, rounded.
Gilmore City has a hot-summer humid continental climate. Summer afternoons average 84° in July; winter nights fall to about 8° in January. A normal year brings about 39 inches of snow; with the rain, that comes to about 33 inches of water.
On November 14 Gilmore City normally reaches 46° and falls to 25°. The record high is 76°, in 1999; the record low −10°, in 1959. The most rain on this date, 1.59 in, fell in 1926.
Normals 1991–2020 and records since 1904 at Pocahontas, 11 miles west. NOAA, through RCC-ACIS.
