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The Wisconsin glaciation extended from about 75,000 to 11,000 years ago, between the Sangamonian Stage and the current interglacial, the Holocene. The maximum ice extent occurred about 25,000–21,000 years ago during the last glacial maximum, also known as the Late Wisconsin in North America. The Last Glacial Period caused a much lower global ...
No rocks from the Paleogene or Neogene period are known from Wisconsin; however, abundant Quaternary deposits can be found as a result of the last Ice Age. The most recent glacial cycle, the Wisconsin Glaciation, began about 31,500 years ago and receded from the state by around 7,000 years ago. During this time the Lake Michigan Lobe and the ...
The Ice Age National Scientific Reserve is an affiliated area of the National Park System of the United States comprising nine sites in Wisconsin that preserve geological evidence of glaciation. To protect the scientific and scenic value of the landforms, the U.S. Congress authorized the creation of a cooperative reserve in 1964.
Scientists call this the "Wisconsin glacial episode," a cold climate period in the most recent ice age. After the glaciers reached their maximum extent around 20,000 years ago, the climate started ...
The Laurentide ice sheet (LIS) was a massive sheet of ice that covered millions of square miles, including most of Canada and a large portion of the Northern United States, multiple times during the Quaternary glaciation epochs, from 2.58 million years ago to the present.
The Ice Age Trail is a National Scenic Trail covering 1,200 miles (1,900 km), following the terminal moraine of the Wisconsin Glaciation. [62] The western terminus is located in Interstate State Park, and the eastern end is in Potawatomi State Park, along the Door Peninsula. [63] The trail passes through 30 of Wisconsin's 72 counties. [64]
The moraine was created when the Green Bay Lobe of the Laurentide Ice Sheet, on the west, collided with the Lake Michigan Lobe of that glacier, on the east, depositing sediment. The western lobe formed Green Bay, Lake Winnebago and the Horicon Marsh. The major part of the Kettle Moraine area is considered interlobate moraine, though other types ...
With nearly 250 maps and photos, 'The Geography of Wisconsin' is an engaging introduction to this state. Here are 20 superlative facts from the book.