Steven Dutch University of Wisconsin-Green Bay

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Presentation transcript:

Steven Dutch University of Wisconsin-Green Bay Geology of Wisconsin Steven Dutch University of Wisconsin-Green Bay

Geology of Wisconsin

Wisconsin’s Geologic Record

Wisconsin Pleistocene Deposits

Timms Hill

Wisconsin Paleozoic Rocks

Mindoro Cut

Wisconsin Precambrian Rocks

Archean Rocks, Jim Falls

Wisconsin 2 Billion Years Ago

Assembling North America

Oldest Rocks in Wisconsin

Oldest Rocks in the U.S.

1900 MY Penokean Orogeny

Assembling North America

1700 MY Granite and Rhyolite

Mazatzal Orogeny

Cactus Rock

Baraboo Interval Quartzites

Yavapai Orogeny

Baraboo Quartzite

1450 MY Wolf River Batholith

Wolf River Batholith

1100 MY Mid-Continent Rift

The Grenville Orogeny Begins

The Grenville Orogeny

St. Croix Dells

The Wisconsin Arch

Erosion of the Wisconsin Arcf

Present Day

“Old Man” River?

Sea Level Falls and Valleys Deepen

Sea Level Rises and Valleys Fill

The Mississippi Today