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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76° on Nov. 17, 2016, the hottest reading for this week of the year since 1895. Next is 75° in 1971.
Geneseo’s center stands about 650 ft above sea level. Within three miles the land runs from 590 ft to 720 ft, a difference of 130 ft: gently rolling country.
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 61×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale, sandstone. Age: Early Pennsylvanian to Middle Pennsylvanian, 307 to 324 million years old. About 19 mi of the line.
Dolostone, limestone. Age: Silurian, 422 to 445 million years old. About 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 Geneseo Creek, the Green River, the Rock River and the Mississippi: about 1,480 river miles.
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 86° in July; winter nights fall to about 15° in January. A normal year brings about 28 inches of snow; with the rain, that comes to about 39 inches of water.
On November 14 Geneseo normally reaches 50° and falls to 31°. The record high is 75°, in 1971; the record low 8°, in 1996. The most rain on this date, 1.43 in, fell in 1926.
Normals 1991–2020 and records since 1895 at Geneseo, here. NOAA, through RCC-ACIS.
