The Pomme de Terre 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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Pomme de Terre’s center stands about 1,190 ft above sea level. Within three miles the land runs from 1,160 ft to 1,270 ft, a difference of 110 ft: gently rolling country.
Under the town center the state geologic map shows Volcaniclastic rocks of felsic to intermediate composition (felsic-volcanic), from the Neoarchean, 2.5 to 2.8 billion 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 48×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Felsic-volcanic. Age: Neoarchean, 2.5 to 2.8 billion years old. About 8 mi of the line.
Schist. Age: Neoarchean, 2.5 to 2.8 billion years old. About 6 mi of the line.
Granite, granodiorite. Age: Neoarchean, 2.5 to 2.8 billion years old. About 3 mi of the line.
Gabbro, peridotite, pyroxenite. Age: Neoarchean, 2.5 to 2.8 billion years old. About 3 mi of the line.
Tonalite, granodiorite, diorite. Age: Neoarchean, 2.5 to 2.8 billion years old. About 2 mi of the line.
Dioritic, granodiorite. Age: Archean to Paleoproterozoic. About 2 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.
Pomme de Terre straddles the Laurentian Divide. Rain on the east side runs to the Gulf of America; most of the rest goes to Hudson Bay.
From the center of town, a raindrop reaches Hudson Bay by way of the Mustinka, the Bois de Sioux, the Red River of the North and the Nelson: about 1,310 river miles. Past the border it runs north through Canada to Hudson Bay. One that lands on the east side reaches the Gulf of America by way of the Pomme de Terre, the Minnesota and the Mississippi: about 2,230 river miles.
Lakes on the way: Lake Traverse and Lake Winnipeg.
550 miles of the trip are on the Red River of the North.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Pomme de Terre; river miles along the main stem, rounded.
