Near Virginia in Saint Louis County, Minnesota — The American Midwest (Upper Plains)
The Laurentian Divide
The name "Laurentian" is used because the granites forming the ridge are similar to and were once thought to be related to, granites of the Laurentian Mountains in Quebec. Although this connection is no longer true, the name has remained.
The Giants Range is made up mostly of several types of granite formed several kilometers deep in the Earth's Crust about 2.7 billon years ago. Uplift and erosion slowly brought the granites to the surface: they have formed a highland throughout time because they are resistant to erosion. In the road cuts near the parking lot, crisscrossing bodies of darker and lighter granite record several successive intrusions of molten rock. Because of the complexity of the rocks, this site is known as "Confusion Hill" to local geologists.
About two billion years ago, the lower ground south of the highlands was covered by an ocean in which sediments were deposited. These sediments formed the rocks that include the world-famous Biwabik Iron Formation of the Mesabi Range. About 80 million years ago during the Cretaceous period, sediments were again deposited in an ocean that lay south of the Giants Range.
Between two million and 10,000 years ago, glaciers that advanced and receded across this terrain removed most of the Cretaceous sedimentary rocks and scoured the older, underlying bedrock surface. Deposits of silt and gravel, and boulders left behind by these glaciers now cover most of the bedrock.
Erected 1998 by Geological Society of Minnesota, Minnesota Department of Transportation, and the Minnesota Geological Survey.
Topics and series. This historical marker is listed in these topic lists: Natural Resources • Science & Medicine. In addition, it is included in the Minnesota: Geological Society of Minnesota series list.
Location. 47° 34.638′ N, 92° 32.611′ W. Marker is near Virginia, Minnesota, in Saint Louis County. Marker is on U.S. 53, on the right when traveling north. Marker is in Superior National Forest at the Laurentian Divide/Lookout Mountain Recreation Area, a well-marked pulloff on U.S. Route 53 four miles north of Virginia. Touch for map. Marker is in this post office area: Virginia MN 55792, United States of America. Touch for directions.
Other nearby markers. At least 8 other markers are within 13 miles of this marker, measured as the crow flies. Oscar Hokka Log House (approx. 3.3 miles away); Gunnar Peterson (approx. 3.3 miles away); 1910 Baldwin Locomotive (approx. 4.7 miles away); Leonidas Merritt (approx. 4.8 miles away); This is Magnetic Taconite (approx. 4.8 miles away); Mountain Iron (approx. 4.8 miles away); John Mariucci (approx. 7.4 miles away); Paul Wellstone Memorial and Historic Site (approx. 12.7 miles away). Touch for a list and map of all markers in Virginia.
Credits. This page was last revised on October 5, 2021. It was originally submitted on July 23, 2009, by Christopher Light of Valparaiso, Indiana. This page has been viewed 4,485 times since then and 62 times this year. Last updated on October 4, 2021, by McGhiever of Minneapolis, Minnesota. Photos: 1, 2, 3, 4. submitted on July 23, 2009, by Christopher Light of Valparaiso, Indiana. • J. Makali Bruton was the editor who published this page.