Minnesota County

Yellow Medicine County, Minnesota

Granite Falls - standing on the oldest rock in North America - from the Morton Gneiss outcrop at Granite Falls (the pink and gray gneiss exposed in the Minnesota River valley at Granite Falls is 3.5 billion years old - the oldest exposed bedrock in North America and among the oldest surface rocks on Earth - visitors to Granite Falls can literally stand on some of the most ancient rock accessible anywhere on the continent) and the Upper Sioux Agency State Park (the site of the Dakota Agency that was attacked on August 18, 1862 at the outbreak of the U.S.-Dakota War, whose ruins document the beginning of the conflict that transformed Minnesota).

County Seat Granite Falls
Population 9,500
Founded 1871
County Website co.ym.mn.us/recorder
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