The Black River Falls 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.
Mostly sunny
Mostly sunny; warmer
Partly cloudy
Partly cloudy
Partly cloudy
Partly cloudy
Showers likely
Black River Falls’s center stands about 800 ft above sea level. Within three miles the land runs from 750 ft to 1,050 ft, a difference of 300 ft: rolling country. The highest named summit within 15 miles is Bruce Mound, about 1,390 ft, 11 miles north-northeast.
Under the town center the state geologic map shows Alkali feldspar granite of 1835 Ma age group (alkali-feldspar-granite), from the Paleoproterozoic, 1.6 to 2.5 billion 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 34×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone. Age: Cambrian, 487 to 542 million years old. About 23 mi of the line.
Alkali-feldspar-granite. Age: Paleoproterozoic, 1.6 to 2.5 billion years old. 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.
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 Black River Falls reaches the Gulf of America by way of the Black River, the Dodge Chute and the Mississippi: about 1,750 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Black River Falls; river miles along the main stem, rounded.
