The Fawn Lake 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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Fawn Lake’s center stands about 1,340 ft above sea level. Within three miles the land runs from 1,240 ft to 1,370 ft, a difference of 130 ft: gently rolling country. The highest named summit within 15 miles is Tower Hill, about 1,500 ft, 14 miles south.
Under the town center the state geologic map shows Schist and tonalitic to granodioritic paragneiss (schist, paragneiss), from the Neoarchean, 2.5 to 2.8 billion 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 64×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Schist, paragneiss. Age: Neoarchean, 2.5 to 2.8 billion years old. About 10 mi of the line.
Siltstone, graywacke, slate. Age: Paleoproterozoic, 1.6 to 2.5 billion years old. About 7 mi of the line.
Granitic. Age: Archean to Paleoproterozoic. About 5 mi of the line.
Dioritic, granodiorite. Age: Archean to Paleoproterozoic. About 2 mi of the line.
Felsic-volcanic. Age: Neoarchean, 2.5 to 2.8 billion years old. About 0.9 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 Fawn Lake reaches the Gulf of America by way of Fish Trap Creek, the Long Prairie, the Crow Wing and the Mississippi: about 2,000 river miles.
Lake on the way: Lake Pepin.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Fawn Lake; river miles along the main stem, rounded.
