DLESE 2004 Annual Meeting

Devil's Lake Field Trip

Located in Baraboo, Wisconsin Devil's Lake State Park is situated along the Ice Age Trail. Geologic features include:
  • Baraboo Quartzite - formed from ocean sand deposits from a time when Wisconsin lay on the edge of the continent. Ripple marks in the quartzite record the current directions from the Precambrian period;
  • Elephant Rock - composed of Cambrian beach and storm deposits from a time when the Baraboo Hills stood as rocky islands in a turbulent tropical ocean;
  • A large talus slope - composed of minivan-sized boulders tumbled from the quartzite cliffs during the last ice age;
  • Devils Lake – situated within an ancient river gorge that was plugged on both ends by glacial deposits during the last ice age;
  • Pot holes - drilled into solid quartzite by river-spun boulders.
Visit the Van Hise National Historical Landmark. This ~1.7-billion-year-old rock, the most famous outcrop of Precambrian Baraboo quartzite, helped formulate a basic concept of structural geology.   Geologist Norlene Emerson explains these ripples.


Tuesday July 13th after meeting:

(note: if you are attending the field trip, it is recommended that you extend your stay to include Tuesday overnight with a Wednesday departure)

12:00 p.m. Depart from Gordon Commons with box lunches

1:00 p.m. Explore Upper Narrows of the Baraboo River in Rock Springs, along the northern limb of the Baraboo syncline.

2:00 p.m. Head to Devil’s Lake.
Devil's Lake State Park is simply spectacular! Some call it the Grand Canyon of the Midwest. Devils Lake is geologically unique. Situated within the Baraboo region, the area straddles the boundary between the Driftless Area of southwestern Wisconsin and the glaciated Eastern Uplands. Three fascinating periods of Earth's history are preserved here:

  • Pleistocene Ice age (~18,000-15,000 years ago);
  • Cambrian (~500 million years ago); and
  • Pre-Cambrian (~1.7 billion years ago).

5:00 p.m. Parfrey’s Glen
Parfrey's Glen – located about 4 miles east of Devil's Lake State Park, reaches a depth of nearly 100 feet at its uppermost part. The Glen's walls are composed of alternate layers of sandstone (representing Cambrian beach deposits) and conglomerate layers containing rounded quartzite boulders representing times when hurricane driven waves smashed into the quartzite islands and washed pieces of it onto the sandy ocean bottom offshore.

6:30 p.m. Dinner In Prairie du Sac

8:00 p.m. Leave for Madison

9:00 p.m. Arrive at Witte

The above photographs are from previous workshops at CIMSS.
Last updated: 21-Jun-2004 by SSEC Webmaster