Granite Falls in Yellow Medicine County, Minnesota — The American Midwest (Upper Plains)
World's Oldest Rock
Site of some of the oldest exposed rock in the world. Geologists estimate this Granitic Gneiss was formed 3,800,000,000 years ago.
the Yellow Medicine County Historical Society
Erected 1975 by the Yellow Medicine County Historical Society.
Location. 44° 48.199′ N, 95° 32.77′ W. Marker is in Granite Falls, Minnesota, in Yellow Medicine County. Marker can be reached from State Highway 67 east of State Highway 23, on the left when traveling east. Touch for map. Marker is by the Yellow Medicine County Historical Society Museum. Marker is at or near this postal address: 98 Minnesota State Highway 67 East, Granite Falls MN 56241, United States of America.
Other nearby markers. At least 8 other markers are within 14 miles of this marker, measured as the crow flies. Ancient Exposed Rocks (a few steps from this marker); School Bell (within shouting distance of this marker); Henry Hill 1829-1879 (within shouting distance of this marker); A Witness to Time (approx. 1.9 miles away); The Hanley Falls Railroad "Y" (approx. 8½ miles away); The Wood Lake Battle Wood Lake Battlefield State Monument (approx. 8.9 miles away); Maza sa Protected His Village (approx. 13.3 miles away). Touch for a list and map of all markers in Granite Falls.
Also see . . .
1. Minnesota Department of Natural Resources. Natural history - Minnesota's geology. (Submitted on September 29, 2013.)
2. Geology of Minnesota. Wikipedia entry. (Submitted on September 29, 2013.)
Categories. • Natural Features •
Credits. This page was last revised on June 16, 2016. This page originally submitted on September 29, 2013, by Keith L of Wisconsin Rapids, Wisconsin. This page has been viewed 398 times since then. Photos: 1, 2, 3, 4. submitted on September 29, 2013, by Keith L of Wisconsin Rapids, Wisconsin.