The South Bloomfield 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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11° on Nov. 13, 2019, the coldest reading for this week of the year since 1894. Next is 12° in 1920.
South Bloomfield’s center stands about 680 ft above sea level. Within three miles the land runs from 660 ft to 770 ft, a difference of 110 ft: gently rolling country. The highest named summit within 15 miles is Sand Hill, about 1,130 ft, 14 miles east-southeast.
Under the town center the state geologic map shows Ohio Shale (shale, black-shale), from the Devonian, 359 to 422 million years old.
The section below crosses 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 44×. 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, black-shale. Age: Devonian, 359 to 422 million years old. About 10 mi of the line.
Dolostone. Age: Silurian, 422 to 445 million years old. About 6 mi of the line.
Shale, siltstone, sandstone. Age: Devonian to Carboniferous, 324 to 422 million years old. About 4 mi of the line.
Limestone. Age: Devonian, 359 to 422 million years old. About 3 mi of the line.
Sandstone, conglomerate. Age: Carboniferous, 324 to 359 million years old. About 0.6 mi of the line.
Shale, sandstone. Age: Devonian to Carboniferous, 324 to 422 million years old. About 0.6 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 1 smaller unit along the line are not listed.
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 South Bloomfield reaches the Gulf of America by way of Mud Run, the Scioto, the Ohio and the Mississippi: about 1,700 river miles.
970 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of South Bloomfield; river miles along the main stem, rounded.
South Bloomfield has a hot-summer humid continental climate. Summer afternoons average 86° in July; winter nights fall to about 23° in January. A normal year brings about 15 inches of snow; with the rain, that comes to about 41 inches of water.
On November 14 South Bloomfield normally reaches 55° and falls to 35°. The record high is 76°, in 1909; the record low 12°, in 2019. The most rain on this date, 1.31 in, fell in 1972.
Normals 1991–2020 and records since 1894 at Circleville, 8 miles south-southeast. NOAA, through RCC-ACIS.
