The Sherman 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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3.92 inches of rain fell in two days, the most for this week of the year since records began in 1902. The next wettest, 3.44 inches, fell in 1918.
Sherman’s center stands about 530 ft above sea level. Within three miles the land runs from 460 ft to 760 ft, a difference of 300 ft: rolling country. The highest named summit within 15 miles is Deasey Mountain, about 1,920 ft, 14 miles west-northwest.
Under the town center the state geologic map shows Silurian undifferentiated pelites and sandstones (slate, sandstone), from the Silurian, 422 to 445 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 28×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Slate, sandstone. Age: Silurian, 422 to 445 million years old. About 13 mi of the line.
Quartzite, calc-silicate-rock. Age: Silurian to Devonian, 359 to 445 million years old. About 8 mi of the line.
Chert, banded-iron-formation. Age: Ordovician, 445 to 487 million years old. About 0.9 mi of the line.
Sandstone. Age: Silurian, 428 to 445 million years old. About 0.8 mi of the line.
Schist. Age: Devonian, 359 to 422 million years old. About 0.6 mi of the line.
Conglomerate. Age: Silurian, 422 to 445 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 Sherman reaches the Atlantic Ocean by way of Lufman Brook, Logan Brook, the Molunkus Stream, the Mattawamkeag and the Penobscot: about 130 river miles.
85 miles of the trip are on the Penobscot.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Sherman; river miles along the main stem, rounded.
Sherman has a warm-summer humid continental climate. Summer afternoons average 79° in July; winter nights fall to about 6° in January. About 43 inches of rain fall in a normal year.
On November 14 Sherman normally reaches 43° and falls to 28°. The record high is 66°, in 1903; the record low 8°, in 1986. The most rain on this date, 2.01 in, fell in 2006.
Normals 1991–2020 and records since 1902 from the Millinocket Area threaded record (Millinocket Municipal Airport, 20 miles southwest, 130 ft lower). NOAA, through RCC-ACIS.
