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“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”

Wonewac in Juneau County, Wisconsin — The American Midwest (Great Lakes)
 

Geology of the 400 Trail

Glacial Lake and Sandstone Bluffs

 
 
Geology of the 400 Trail Marker image. Click for full size.
By Cosmos Mariner, July 20, 2012
1. Geology of the 400 Trail Marker
Inscription.  If you had been here 12,000 years ago, you would be standing at the bottom of an 1825 square mile lake called Glacial Lake Wisconsin. It was formed when glacial ice blocked the Wisconsin River, allowing water to back up to Stevens Point. The valley you are in was a long narrow bay of the lake with surrounding sandstone bluffs as the shoreline. The flat lake left an ideal path for building a railway that became the 400 trail!

The large sandstone outcrop seen beyond this sign is known locally as the "Third Castle." It stood as an island in Glacial Lake Wisconsin. The name "Castle" comes from the fact that these rock bluffs reminded European settlers of the walls of castles from their homelands. First and second castle are located to the left but are not clearly visible from here. The castles are on private property so can only be enjoyed from this view.

The area north of Third Castle is shaded most of the day. This creates a cool climate where hemlock trees, normally found farther north, can grow in the cliff’s shade.
 
Topics. This historical marker is listed in this topic list: Natural Features.
 
Location.
Marker detail: Glacial Lake Wisconsin Map image. Click for full size.
2. Marker detail: Glacial Lake Wisconsin Map
43° 39.929′ N, 90° 14.155′ W. Marker is in Wonewac, Wisconsin, in Juneau County. Marker can be reached from Gordon Street west of Center Street (State Route 33). Marker is located along the "400" State Trail (rail trail) about 1 mile north of the Wonewoc Trailhead on Gordon Street. Touch for map. Marker is in this post office area: Wonewoc WI 53968, United States of America. Touch for directions.
 
Other nearby markers. At least 8 other markers are within 9 miles of this marker, measured as the crow flies. Towns made from this? (approx. half a mile away); The Lost District (approx. one mile away); Wonewoc History (approx. one mile away); Mt. Vernon Cemetery Civil War Memorial (approx. 5.8 miles away); African American Settlers of Cheyenne Valley (approx. 5.8 miles away); Admiral Marc A. Mitscher, U.S. Navy (approx. 5.9 miles away); Elroy – Sparta State Trail (approx. 6.1 miles away); Stewart's Chapel (approx. 8.6 miles away).
 
Also see . . .  Glacial Lake Wisconsin (Wikipedia). Around 18,000 years ago, the Green Bay lobe of the Laurentide ice sheet crept in from the east, butting up against the Baraboo Hills. With that outlet closed, the water backed up, filling the basin to the north and west, forming Glacial Lake Wisconsin. The water rose to as deep as 160 feet, with a surface area eight times the size of modern Lake Winnebago. (Submitted on October 27, 2020, by Cosmos Mariner of Cape Canaveral, Florida.) 
 
Geology of the 400 Trail Marker image. Click for full size.
By Cosmos Mariner, July 20, 2012
3. Geology of the 400 Trail Marker
"Third Castle" image. Click for full size.
By Cosmos Mariner, July 20, 2012
4. "Third Castle"
(view from marker)
 
 
Credits. This page was last revised on October 27, 2020. It was originally submitted on October 27, 2020, by Cosmos Mariner of Cape Canaveral, Florida. This page has been viewed 45 times since then and 5 times this year. Photos:   1, 2, 3, 4. submitted on October 27, 2020, by Cosmos Mariner of Cape Canaveral, Florida.
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Mar. 5, 2021