The Aldrich 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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82° on Nov. 14, 1999, the hottest reading for this week of the year since 1900. Next is 80° in 1911.
Aldrich’s center stands about 960 ft above sea level. Within three miles the land runs from 850 ft to 1,090 ft, a difference of 240 ft: rolling country. The highest named summit within 15 miles is Graveyard Hill, about 1,260 ft, 13 miles east.
Under the town center the state geologic map shows Osagean Series (limestone), from the Carboniferous, 324 to 359 million years old.
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 55×. 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. Age: Carboniferous, 324 to 359 million years old. About 12 mi of the line.
Dolostone. Age: Early Ordovician, 471 to 487 million years old. About 5 mi of the line.
Shale, siltstone, mudstone. Age: Carboniferous, 299 to 324 million years old. About 5 mi of the line.
Limestone, siltstone. Age: Carboniferous, 324 to 359 million 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 Aldrich reaches the Gulf of America by way of the Sac, the Osage, the Missouri and the Mississippi: about 1,590 river miles.
1,170 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Aldrich; river miles along the main stem, rounded.
Aldrich has a humid subtropical climate. Summer afternoons average 89° in July; winter nights fall to about 22° in January. About 46 inches of rain fall in a normal year.
On November 14 Aldrich normally reaches 58° and falls to 35°. The record high is 82°, in 1999; the record low 7°, in 1986. The most rain on this date, 3.52 in, fell in 1985.
Normals 1991–2020 and records since 1900 at Bolivar 1 NE, 10 miles east-northeast. NOAA, through RCC-ACIS.
