The Geneseo 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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83° on Nov. 14, 1999, the hottest reading for this week of the year since 1941. Next is 81° in 2016.
Geneseo’s center stands about 1,760 ft above sea level. Within three miles the land runs from 1,680 ft to 1,790 ft, a difference of 110 ft: gently rolling country.
Under the town center the state geologic map shows Loess (silt), from the Pleistocene to Holocene, less than 2.6 million years old.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 62×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Silt. Age: Pleistocene to Holocene, less than 2.6 million years old. About 16 mi of the line.
Claystone, mudstone, shale. Age: Early Cretaceous, 100 to 145 million years old. About 5 mi of the line.
Sandstone, black-shale. Age: Early Cretaceous, 100 to 145 million years old. About 2 mi of the line.
Sand, silt, clay. Age: Pleistocene, less than 2.6 million years old. About 1 mi of the line.
Sand, silt, clay. Age: Pleistocene to Holocene, less than 2.6 million years old. About 0.6 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 Geneseo reaches the Gulf of America by way of the Little Arkansas, the Arkansas and the Mississippi: about 1,440 river miles.
Lakes on the way: Murray Lake and Ozark Lake.
600 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Geneseo; river miles along the main stem, rounded.
Geneseo has a hot-summer humid continental climate. Summer afternoons average 92° in July; winter nights fall to about 19° in January. A normal year brings about 12 inches of snow; with the rain, that comes to about 30 inches of water.
On November 14 Geneseo normally reaches 56° and falls to 32°. The record high is 83°, in 1999; the record low 4°, in 1986. The most rain on this date, 0.21 in, fell in 1993.
Normals 1991–2020 and records since 1941 at Kanopolis Lake, 12 miles east-northeast, 270 ft lower. NOAA, through RCC-ACIS.
