The Bangor 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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Bangor’s center stands about 1,320 ft above sea level. Within three miles the land runs from 1,290 ft to 1,360 ft, a difference of 70 ft: gently rolling country.
Under the town center the state geologic map shows Foliated to gneissic tonalite and granodiorite (orthogneiss), from the Paleoarchean to Mesoarchean, 2.8 to 3.6 billion 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 62×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Orthogneiss. Age: Paleoarchean to Mesoarchean, 2.8 to 3.6 billion years old. About 15 mi of the line.
Orthogneiss. Age: Paleoarchean to Mesoarchean, 2.8 to 3.6 billion years old. About 4 mi of the line.
Leucocratic-granitic. Age: Neoarchean, 2.5 to 2.8 billion years old. About 2 mi of the line.
Granodiorite, granite. Age: Paleoproterozoic, 1.6 to 1.8 billion years old. About 2 mi of the line.
Orthogneiss, migmatite. Age: Paleoarchean to Mesoarchean, 2.8 to 3.6 billion years old. About 1 mi of the line.
Age: Paleoproterozoic, 1.8 to 2 billion 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 Bangor reaches the Gulf of America by way of Sedan Brook, the North Fork Crow, the Crow and the Mississippi: about 2,040 river miles.
Lakes on the way: Lake Pepin and Lake Koronis.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Bangor; river miles along the main stem, rounded.
