The East Bronson 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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3.54 inches of rain fell in two days, the most for this week of the year since records began in 1956. The next wettest, 3.15 inches, fell in 2002.
East Bronson’s center stands about 90 ft above sea level. Within three miles the land runs from 60 ft to 130 ft, a difference of 70 ft: gently rolling country.
Under the town center the state geologic map shows Hawthorn Group, Undifferentiated (sand, clay), from the Miocene, 5.3 to 23 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 64×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sand, clay. Age: Miocene, 5.3 to 23 million years old. About 11 mi of the line.
Limestone. Age: Late Eocene, 34 to 38 million years old. About 7 mi of the line.
Sand, clay. Age: Pleistocene to Holocene, less than 2.6 million years old. About 7 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.
East Bronson has a humid subtropical climate. Summer afternoons average 89° in June; winter nights fall to about 44° in January. About 57 inches of rain fall in a normal year.
On November 14 East Bronson normally reaches 74° and falls to 52°. The record high is 86°, in 1985; the record low 27°, in 1968. The most rain on this date, 1.21 in, fell in 2000.
Normals 1991–2020 and records since 1956 at Usher Tower, 14 miles west-southwest. NOAA, through RCC-ACIS.
