The Mazon 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.
Sunny
Sunny; warmer
Sunny
Sunny
Partly cloudy
Partly cloudy
Partly cloudy
3° on Nov. 17, 1959, the coldest reading for this week of the year since 1911. Next is 4° in 1933.
Mazon’s center stands about 590 ft above sea level. Within three miles the land runs from 560 ft to 610 ft, a difference of 50 ft: nearly flat ground.
Under the town center the state geologic map shows Carbondale Formation (shale, sandstone, coal), from the Middle Pennsylvanian to Late Pennsylvanian, 304 to 315 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 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.
Shale, sandstone, coal. Age: Middle Pennsylvanian to Late Pennsylvanian, 304 to 315 million years old. About 12 mi of the line.
Shale, limestone. Age: Late Pennsylvanian, 304 to 307 million years old. About 8 mi of the line.
Dolostone, limestone. Age: Late Ordovician, 447 to 459 million years old. About 2 mi of the line.
Shale, sandstone. Age: Early Pennsylvanian to Middle Pennsylvanian, 307 to 324 million years old. About 2 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 Mazon reaches the Gulf of America by way of Johnny Run, the Mazon, the Illinois and the Mississippi: about 1,480 river miles.
Lake on the way: Peoria Lake.
1,190 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Mazon; river miles along the main stem, rounded.
Mazon has a hot-summer humid continental climate. Summer afternoons average 85° in July; winter nights fall to about 16° in January. A normal year brings about 25 inches of snow; with the rain, that comes to about 39 inches of water.
On November 14 Mazon normally reaches 50° and falls to 32°. The record high is 74°, in 1999; the record low 5°, in 1996. The most rain on this date, 1.30 in, fell in 1926.
Normals 1991–2020 and records since 1911 at Morris 1 NW, 9 miles north. NOAA, through RCC-ACIS.
