Marker Logo HMdb.org THE HISTORICAL
MARKER DATABASE
“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
Near Stillwater in Washington County, Minnesota — The American Midwest (Upper Plains)
 

Geology of Minnesota

Stillwater Region

 
 
Geology of Minnesota Marker image. Click for full size.
By Keith L, June 11, 2011
1. Geology of Minnesota Marker
Inscription.
     The site of this tablet marks the northern limit of Lake St. Croix, impounded by the natural dam of sand and gravel, made by the Mississippi where it is joined by the St. Croix River, twenty miles below Stillwater. The valley, with its steep banks, is typical of youthful topography - of a young stream - and its size, compared with the river, indicates that a much larger volume of water flowed here when the St. Croix was an outlet of glacial Lake Duluth, the ancestor of Lake Superior. The highway and picnic grounds occupy a river terrace on which the river flowed at an earlier stage. The rock walls of the valley are chiefly sandstones formed in the sea when it covered Minnesota during the Cambrian period 500 million years ago. Because of the thickness of the beds and the excellence of the exposures along the river, these formations, wherever they appear in North America, are known as the St. Croixian series.

Erected by the Geological Society of Minnesota
in cooperation with the Department of Highways
State of Minnesota

 
Erected 1950 by the Geological Society of Minnesota.
 
Location. 45° 4.882′ N, 92° 47.459′ W. Marker is near Stillwater, Minnesota
Geology of Minnesota Marker image. Click for full size.
By Keith L, June 11, 2011
2. Geology of Minnesota Marker
, in Washington County. Marker can be reached from Saint Croix Trail North (State Highway 95) one mile north of Dellwood Road (State Highway 96), on the right when traveling north. Touch for map. Marker is at a scenic overlook. Marker is in this post office area: Stillwater MN 55082, United States of America.
 
Other nearby markers. At least 8 other markers are within 2 miles of this marker, measured as the crow flies. Tamarack House (approx. one mile away); The Warden's House (approx. 1.6 miles away); St. Croix Lumber Mills / Stillwater Manufacturing Company (approx. 1.7 miles away); 1965 Easter Sunday Floodwater Crest (approx. 1.8 miles away); 114 North Main Street (approx. 1.8 miles away); 1884 Upper St. Croix River Log Jam (approx. 1.9 miles away); Birthplace of Minnesota (approx. 1.9 miles away); 226 East Myrtle Street (approx. 1.9 miles away). Touch for a list and map of all markers in Stillwater.
 
Also see . . .  Geology of Minnesota. Wikipedia entry. (Submitted on July 1, 2011.) 
 
Categories. Waterways & Vessels
 
Geology of Minnesota Marker image. Click for full size.
By Keith L, June 11, 2011
3. Geology of Minnesota Marker
Overlook image. Click for full size.
By Keith L, June 11, 2011
4. Overlook
View from Overlook image. Click for full size.
By Keith L, June 11, 2011
5. View from Overlook
Stillwater is in the distance.
Nearby Sign image. Click for full size.
By Keith L, June 11, 2011
6. Nearby Sign
Prairie Restoration
This site is being actively managed to restore the prairie community. Prairie is a permanent grassland that contains many kinds of grasses and flowering plants and a variety of birds and other animals. Prairie is a complex biological community very unlike the annual farm crops now grown in most of what was once prairie. Restoration is an artificial, still largely experimental, attempt to regenerate a natural biological community. It involves prescribed fire, plantings, weed control and many other techniques. Many years, perhaps decades, of patient work will be required to even partially restore this prairie.
Minnesota Department of Natural Resources
 
 
Credits. This page was last revised on June 16, 2016. This page originally submitted on July 1, 2011, by Keith L of Wisconsin Rapids, Wisconsin. This page has been viewed 516 times since then and 27 times this year. Photos:   1, 2, 3, 4, 5, 6. submitted on July 1, 2011, by Keith L of Wisconsin Rapids, Wisconsin.
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