The Anthon 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.
Mostly sunny
Mostly sunny
Mostly sunny
Partly cloudy
Partly cloudy
Partly cloudy
Showers likely
77° on Nov. 13, 1999, the hottest reading for this week of the year since 1937. Next is 76° in 1953.
Anthon’s center stands about 1,120 ft above sea level. Within three miles the land runs from 1,090 ft to 1,400 ft, a difference of 310 ft: rolling country.
Under the town center the state geologic map shows Gilmore City Formation (limestone), from the Early Mississippian to Middle Mississippian, 331 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 47×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone, shale. Age: Early Cretaceous to Late Cretaceous, 94 to 113 million years old. About 22 mi of the line.
Dolostone, limestone. Age: Early Mississippian to Middle Mississippian, 331 to 359 million years old. About 1 mi of the line.
Limestone. Age: Early Mississippian to Middle Mississippian, 331 to 359 million years old. About 1 mi of the line.
Shale. Age: Late Cretaceous, 90 to 100 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 Anthon reaches the Gulf of America by way of the Little Sioux, the Missouri and the Mississippi: about 1,870 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 Anthon; river miles along the main stem, rounded.
Anthon has a hot-summer humid continental climate. Summer afternoons average 84° in July; winter nights fall to about 9° in January. A normal year brings about 31 inches of snow; with the rain, that comes to about 32 inches of water.
On November 14 Anthon normally reaches 47° and falls to 25°. The record high is 72°, in 1990; the record low −13°, in 1959. The most rain on this date, 0.73 in, fell in 2024.
Normals 1991–2020 and records since 1937 at Mapleton No.2, 15 miles south-southeast. NOAA, through RCC-ACIS.
