Willmar in Kandiyohi County, Minnesota — The American Midwest (Upper Plains)
Geology of the Willmar Region
The agricultural land of the Willmar region has a history that dates back 60 million years, when an inland sea covered the Great Plains from the Gulf of Mexico to the Arctic Ocean. As the adjacent land eroded and life in the sea flourished, sediments for sandstone, shale, and limestone were deposited on the sea floor and eventually became rock. Later, when the sea level dropped, these sedimentary rocks were exposed on dry land.
About 14,000 years ago, during the end of the Ice Age of the last two million years, glaciers advancing southward from Canada scraped up and carried great quantities of those sedimentary marine rocks from Manitoba and northwestern Minnesota. When the ice melted, rock fragments, crushed by the moving ice, were left as a layer of glacial drift across the state. This drift was rich in lime, magnesia and potash, so became a great natural resource as the parent material for fertile soils over much of the state.
Earlier glaciers also advanced across Minnesota from the north-northeast about 25,000 years ago. This ice eroded the igneous bedrock in Ontario and the Lake Superior region and deposited a reddish, more sandy and rocky drift. Soils that developed from this parent material are not as fertile.
Most of the surface material in the Willmar region is the rich,
Minnesota Department of Transportation and the Minnesota Geological Survey 1998
Erected 1998 by the Geological Society of Minnesota in partnership with the Minnesota Department of Transportation and the Minnesota Geological Survey.
Location. 45° 7.626′ N, 95° 2.782′ W. Marker is in Willmar, Minnesota, in Kandiyohi County. Marker can be reached from Ella Avenue Northwest 0.1 miles west of Business U.S. 71, on the right when traveling west. Touch for map. Marker is along the south shore of Foot Lake in Thompson Park. Marker is in this post office area: Willmar MN 56201, United States of America.
Other nearby markers. At least 8 other markers are within 3 miles of this marker, measured as the crow flies. Veterans War Memorial (approx. 0.3 Great Northern Railway Engine No. 2523 (approx. half a mile away); "Kandiyohi" (approx. half a mile away); Kandiyohi County Indian History (approx. half a mile away); Robbins Island (approx. 0.6 miles away); Veteran's Memorial (approx. one mile away); C.C.C. Worker (approx. one mile away); Haugen Homestead (approx. 2.6 miles away). Touch for a list and map of all markers in Willmar.
Also see . . . Geology of Minnesota. Wikipedia entry. (Submitted on August 2, 2014.)
Additional keywords. Geology of Minnesota Willmar Region
Categories. • Natural Features •
Credits. This page was last revised on June 16, 2016. This page originally submitted on August 2, 2014, by Keith L of Wisconsin Rapids, Wisconsin. This page has been viewed 326 times since then. Photos: 1, 2, 3. submitted on August 2, 2014, by Keith L of Wisconsin Rapids, Wisconsin.