The Wisconsin Geological and Natural History Survey (WGNHS) has been working to serve Wisconsin for over 100 years. Part of University of Wisconsin-Extension, we provide objective scientific information about the geology, mineral resources, and water resources of Wisconsin.
A topographical map of Wisconsin shows the diverse landscape through which the Wisconsin River travels today. Note how the lobes of the Laurentide Ice Sheet deeply affected the course of the river and contributed to the formation and subsequent draining of glacial Lake Wisconsin. (more at http://tinyurl.com/yaf8kpl8) #MondayMap
From a hillside near the Shadewald Mounds, just outside of Muscoda, Carson describes how thousands of years of glacier-derived sediment covered the deeply scoured bedrock of the ancient river valley (visible in the distance) with sand, gravel, and other debris. Photo by Tom Jenz. (More at http://tinyurl.com/yaf8kpl8)