Near Westfield in Marquette County, Wisconsin — The American Midwest (Great Lakes)
Footprints in the Sands of Time
During the Cambrian geological period, North America lay along the equator with Wisconsin in the southern tropics. A shallow sea covered most of the continent and tropical storms churned that sea as they do today in the Gulf of Mexico. The Cambrian seashores of Wisconsin were pounded by such storms countless times. Subsequently, the tropical landmass was rotated and moved north by continental drift to become present mid-latitude North America.
[graphic] W represents the location of tropical Wisconsin 520 Million Years Ago. [below
Paleontologists believe that the track maker was a large, slug-like animal without a skeleton, which fed by sucking microbes from damp sand as it crawled at low tide. The cross bars were made as the animal crept forward and the ridges along the sides probably helped preserve the track from later destruction by waves or currents. Besides Wisconsin, such trails are known from eastern North America and Missouri in sandstone of the same age. This boulder was carried by Wisconsinís last glacier from 20 or 30 miles northeast of here and was dropped about 20,000 years ago near the ice front, which lay about 6 miles to the west.
Boulder discovered and donated by Milestone Materials Div. of Mathy Construction Co., Onalaska WI.
Text provided by Robert H. Dott Jr., Geologist, UW-Madison .
Location. 43° 57.018′ N, 89° 28.962′ W. Marker is near Westfield, Wisconsin, in Marquette County. Marker is on U. S. Highway 51 (Interstate 39 at milepost 117), on the right when traveling north. Touch for map. Marker is at Rest Area 82. Marker is in this post office area: Westfield WI 53964, United States of America.
Other nearby markers. At least 8 other markers are within 13 miles of this marker, measured as the crow flies. Korean War (a few steps from this marker); Russell Flats School Sacred to the Memory of the Soldiers (approx. 11.8 miles away); Whistler Mound Group and Enclosure (approx. 12.3 miles away); Waushara County World War I Memorial (approx. 12.8 miles away); Waushara County Veterans Memorial (approx. 12.8 miles away); Waushara County Civil War Memorial (approx. 12.8 miles away); Pioneer Wautoma (approx. 12.9 miles away). Touch for a list and map of all markers in Westfield.
Categories. • Animals •
Credits. This page was last revised on June 16, 2016. This page originally submitted on October 3, 2007, by Keith L of Wisconsin Rapids, Wisconsin. This page has been viewed 1,652 times since then and 24 times this year. Photos: 1, 2, 3. submitted on October 3, 2007, by Keith L of Wisconsin Rapids, Wisconsin. • J. J. Prats was the editor who published this page.