The Brownfield 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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74° on Nov. 11, 2002, the hottest reading for this week of the year since 1996. Next is 74° in 2022.
Brownfield’s center stands about 440 ft above sea level. Within three miles the land runs from 360 ft to 1,460 ft, a difference of 1,100 ft: steep hill country. The highest named summit within 15 miles is Kearsarge North, about 3,260 ft, 15 miles northwest.
Under the town center the state geologic map shows Devonian granodiorite, from the Devonian, 359 to 422 million years old.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 10×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Mudstone, limestone. Age: Silurian to Devonian, 359 to 445 million years old. About 9 mi of the line.
Granodiorite. Age: Devonian, 359 to 422 million years old. About 6 mi of the line.
Granite. Age: Carboniferous, 299 to 359 million years old. About 4 mi of the line.
Granite. Age: Carboniferous, 299 to 359 million years old. About 3 mi of the line.
Granite. Age: Middle Jurassic to Late Jurassic, 145 to 175 million years old. About 3 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 Brownfield reaches the Atlantic Ocean by way of Billy Brook and the Saco: about 75 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Brownfield; river miles along the main stem, rounded.
Brownfield has a warm-summer humid continental climate. Summer afternoons average 82° in July; winter nights fall to about 7° in January. About 47 inches of rain fall in a normal year.
On November 14 Brownfield normally reaches 47° and falls to 26°. The record high is 63°, in 2016; the record low 4°, in 2019. The most rain on this date, 2.06 in, fell in 2009.
Normals 1991–2020 and records since 1996 at Fryeburg Eastern Slopes Regl Airport, 4 miles north-northwest. NOAA, through RCC-ACIS.
