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MARKER DATABASE
“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
Near Trempealeau in Trempealeau County, Wisconsin — The American Midwest (Great Lakes)
 

The Geology of Perrot State Park

 
 
The Geology of Perrot State Park Marker image. Click for full size.
By Keith L, June 5, 2011
1. The Geology of Perrot State Park Marker
Inscription.
Millions of Years Ago
[drawing]
Millions of years ago, Trempealeau Mountain, the bluffs of Perrot State Park, and the Minnesota upland across the river were all one continuous rock mass. Over time, Cedar Creek, Big Trout Creek, and their tributaries carved channels that would isolate Trempealeau Mountain. This drawing shows that the Mississippi River ran north of the park.

Present Day
[drawing]
During the last part of the Ice Age, some 50,000 years ago, glacial meltwaters laden with sand, gravel, and debris blocked the river's previous route. This forced the Mississippi River to seek a new channel. This drawing shows how this diversion shifted the boundary between Wisconsin and Minnesota. We can thank the glacier for giving Wisconsin the gift of Perrot State Park.
 
Location. 44° 1.398′ N, 91° 29.22′ W. Marker is near Trempealeau, Wisconsin, in Trempealeau County. Marker can be reached from South Park Road. Touch for map. Marker is in Perrot State Park (fee area) at a vista near the Black Walnut Nature Trail parking area. Marker is at or near this postal address: W26247 Sullivan Road, Trempealeau WI 54661, United States of America.
 
Other nearby markers. At least 8 other markers are within 7 miles of this marker, measured as the crow
The Geology of Perrot State Park Marker image. Click for full size.
By Keith L, June 5, 2011
2. The Geology of Perrot State Park Marker
flies. Brady's Bluff (approx. 0.7 miles away); Perrot's Post (approx. 0.9 miles away); French Post (approx. 0.9 miles away); James Allen Reed / Trempealeau (approx. 2.6 miles away); Pickwick Mill (approx. 3 miles away in Minnesota); Historic Lake Labelle (approx. 3 miles away in Minnesota); The Mississippi River Parkway: (approx. 3.4 miles away); Sugar Loaf Bluff (approx. 7 miles away in Minnesota). Touch for a list and map of all markers in Trempealeau.
 
More about this marker. Wisconsin map caption:
Maximum extent of glacial ice in Wisconsin. Glacial meltwaters shaped the landscape at Perrot State Park, not glacial ice.
Legend
[red triangle] You are here
[yellow] Limestone bluffs formed from sediment deposited by shallow seas over 450 million years ago
[white] Flood Plain
 
Also see . . .
1. Perrot State Park's Geology. (Submitted on August 30, 2011.)
2. Trempealeau Mountain (No. 356). "Surrounded by the Mississippi and Trempealeau Rivers, the steep-sided Trempealeau Mountain is one of only three solid rock islands along the entire stretch of Mississippi River." (Submitted on August 30, 2011.) 
 
Categories. Natural Features
 
The Geology of Perrot State Park Marker image. Click for full size.
By Keith L, June 5, 2011
3. The Geology of Perrot State Park Marker
Trempealeau Mountain
Trempealeau Mountain and Bay image. Click for full size.
By Keith L, June 5, 2011
4. Trempealeau Mountain and Bay
Trempealeau Bay image. Click for full size.
By Keith L, June 5, 2011
5. Trempealeau Bay
Perrot State Park Map image. Click for full size.
By Keith L, June 5, 2011
6. Perrot State Park Map
Located at nearby Brady's Bluff.
Mississippi River image. Click for full size.
By Keith L, June 5, 2011
7. Mississippi River
Nearby Lock and Dam No. 6
 
 
Credits. This page was last revised on June 16, 2016. This page originally submitted on August 30, 2011, by Keith L of Wisconsin Rapids, Wisconsin. This page has been viewed 510 times since then and 19 times this year. Photos:   1, 2, 3, 4, 5, 6, 7. submitted on August 30, 2011, by Keith L of Wisconsin Rapids, Wisconsin.
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