The Groverton 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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75° on Nov. 11, 2020, the hottest reading for this week of the year since 1897. Next is 74° in 1911.
Groverton’s center stands about 730 ft above sea level. Within three miles the land runs from 690 ft to 800 ft, a difference of 110 ft: gently rolling country.
Under the town center the state geologic map shows Antrim Shale (black-shale), from the Devonian, 359 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 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.
Black-shale. Age: Devonian, 359 to 422 million years old. About 17 mi of the line.
Shale. Age: Devonian to Carboniferous, 324 to 422 million years old. About 8 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.
Groverton has a hot-summer humid continental climate. Summer afternoons average 82° in July; winter nights fall to about 16° in January. A normal year brings about 28 inches of snow; with the rain, that comes to about 42 inches of water.
On November 14 Groverton normally reaches 49° and falls to 32°. The record high is 68°, in 2011; the record low 11°, in 2019. The most rain on this date, 0.43 in, fell in 2024.
Normals 1991–2020 and records since 1897 at Knox Wwtp, 8 miles southwest. NOAA, through RCC-ACIS.
