The Unadilla Forks 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.
Showers likely
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74° on Nov. 11, 2020, the hottest reading for this week of the year since 1907. Next is 69° in 1999.
Unadilla Forks’s center stands about 1,170 ft above sea level. Within three miles the land runs from 1,150 ft to 1,840 ft, a difference of 690 ft: hilly country. The highest named summit within 15 miles is Angel Hill, about 2,120 ft, 9 miles east-southeast.
Under the town center the state geologic map shows Marcellus Formation (black-shale), from the Middle Devonian, 388 to 394 million years old.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 18×. 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: Middle Devonian, 388 to 394 million years old. About 11 mi of the line.
Shale, siltstone, sandstone. Age: Middle Devonian, 384 to 394 million years old. About 10 mi of the line.
Limestone. Age: Early Devonian to Middle Devonian, 388 to 410 million years old. About 2 mi of the line.
Limestone, dolostone. Age: Early Devonian, 394 to 422 million years old. About 0.8 mi of the line.
Limestone, dolostone, shale. Age: Silurian, 422 to 428 million years old. About 0.5 mi of the line.
Sandstone, shale. Age: Middle Devonian, 384 to 388 million years old. About 0.4 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 Unadilla Forks reaches Chesapeake Bay and the Atlantic Ocean by way of the Unadilla and the Susquehanna: about 460 river miles.
Lake on the way: Lake Aldred.
360 miles of the trip are on the Susquehanna.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Unadilla Forks; river miles along the main stem, rounded.
Unadilla Forks has a warm-summer humid continental climate. Summer afternoons average 80° in July; winter nights fall to about 12° in January. A normal year brings about 77 inches of snow; with the rain, that comes to about 42 inches of water.
On November 14 Unadilla Forks normally reaches 47° and falls to 29°. The record high is 65°, in 2010; the record low 7°, in 2019. The most rain on this date, 0.85 in, fell in 1916.
Normals 1991–2020 and records since 1907 at Sherburne, 18 miles southwest. NOAA, through RCC-ACIS.
