The Otisfield 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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Otisfield’s center stands about 700 ft above sea level. Within three miles the land runs from 320 ft to 840 ft, a difference of 520 ft: hilly country. The highest named summit within 15 miles is Pleasant Mountain, about 1,990 ft, 14 miles west-southwest.
Under the town center the state geologic map shows Carboniferous alkali feldspar granite (muscovite accessory mineral), from the Carboniferous, 299 to 359 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 24×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Granite. Age: Carboniferous, 299 to 359 million years old. About 19 mi of the line.
Granite. Age: Carboniferous, 299 to 359 million years old. About 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.
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 Otisfield reaches the Atlantic Ocean by way of Mill Brook, the Crooked River and the Presumpscot: about 55 river miles.
Lake on the way: Sebago Lake Basin.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Otisfield; river miles along the main stem, rounded.
