The Clarkson 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.
81° on Nov. 11, 2002, the hottest reading for this week of the year since 1964. Next is 80° in 1989.
Clarkson’s center stands about 710 ft above sea level. Within three miles the land runs from 580 ft to 770 ft, a difference of 190 ft: gently rolling country. The highest named summit within 15 miles is Buzzard Roost, about 970 ft, 8 miles southeast.
Under the town center the state geologic map shows Rocks of Chesterian age, upper part (shale), from the Carboniferous, 324 to 359 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 56×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Limestone, sandstone. Age: Carboniferous, 324 to 359 million years old. About 13 mi of the line.
Shale. Age: Carboniferous, 324 to 359 million years old. About 8 mi of the line.
Sandstone. Age: Carboniferous, 299 to 324 million years old. About 3 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 Clarkson reaches the Gulf of America by way of Bear Creek, the Green River, the Ohio and the Mississippi: about 1,380 river miles.
970 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Clarkson; river miles along the main stem, rounded.
Clarkson has a humid subtropical climate. Summer afternoons average 91° in July; winter nights fall to about 24° in January. About 54 inches of rain fall in a normal year, with about 5 inches of snow.
On November 14 Clarkson normally reaches 61° and falls to 34°. The record high is 77°, in 1989; the record low 12°, in 1986. The most rain on this date, 2.18 in, fell in 2024.
Normals 1991–2020 and records since 1964 at Nolin River Lake, 15 miles south. NOAA, through RCC-ACIS.