The Gann (Brinkhaven) 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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78° on Nov. 11, 2020, the hottest reading for this week of the year since 1916. Next is 75° in 1927.
Gann (Brinkhaven)’s center stands about 950 ft above sea level. Within three miles the land runs from 860 ft to 1,280 ft, a difference of 420 ft: hilly country. The highest named summit within 15 miles is Bald Knob, about 1,260 ft, 13 miles north-northwest.
Under the town center the state geologic map shows Maxville Limestone; Rushville, Logan, and Cuyhoga Formations, Undivided (shale, siltstone, sandstone), from the Devonian to Carboniferous, 324 to 422 million years old.
The section below crosses 2 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 36×. 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, siltstone, sandstone. Age: Devonian to Carboniferous, 324 to 422 million years old. About 17 mi of the line.
Shale, siltstone. Age: Carboniferous, 299 to 324 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.
A raindrop that lands in Gann (Brinkhaven) reaches the Gulf of America by way of Negro Run, the Mohican, the Walhonding, the Muskingum, the Ohio and the Mississippi: about 1,920 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 Gann (Brinkhaven); river miles along the main stem, rounded.
Gann (Brinkhaven) has a hot-summer humid continental climate. Summer afternoons average 84° in July; winter nights fall to about 18° in January. A normal year brings about 20 inches of snow; with the rain, that comes to about 41 inches of water.
On November 14 Gann (Brinkhaven) normally reaches 52° and falls to 31°. The record high is 71°, in 1994; the record low 11°, in 2019. The most rain on this date, 1.16 in, fell in 1972.
Normals 1991–2020 and records since 1916 at Millersburg, 15 miles east-northeast, 130 ft lower. NOAA, through RCC-ACIS.
