The Olivet 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 1973. Next is 80° in 1989.
Olivet’s center stands about 1,160 ft above sea level. Within three miles the land runs from 1,030 ft to 1,160 ft, a difference of 130 ft: gently rolling country.
Under the town center the state geologic map shows Shawnee Group (limestone, shale), from the Carboniferous, 299 to 324 million years old.
The section below crosses 5 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.
Limestone, shale. Age: Carboniferous, 299 to 324 million years old. About 11 mi of the line.
Shale. Age: Carboniferous, 299 to 324 million years old. About 9 mi of the line.
Shale, sandstone. Age: Carboniferous, 299 to 324 million years old. About 2 mi of the line.
Sand, silt, clay. Age: Pleistocene to Holocene, less than 2.6 million years old. About 2 mi of the line.
Gravel. Age: Tertiary, 2.6 to 66 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 Olivet reaches the Gulf of America by way of Frog Creek, Long Creek, the Marais des Cygnes, the Osage, the Missouri and the Mississippi: about 1,760 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 Olivet; river miles along the main stem, rounded.
Olivet has a hot-summer humid continental climate. Summer afternoons average 90° in July; winter nights fall to about 20° in January. About 38 inches of rain fall in a normal year.
On November 14 Olivet normally reaches 57° and falls to 35°. The record high is 82°, in 1999; the record low 7°, in 1986. The most rain on this date, 0.30 in, fell in 1993.
Normals 1991–2020 and records since 1973 at Melvern Lake, 3 miles east-northeast. NOAA, through RCC-ACIS.
