which lobe of the retreating laurentide ice front created the fort wayne moraine in the ann arbor area starting approximately 14,500 years ago?



Answer :

Huron-Erie lobe of the retreating Laurentide ice front created the Fort Wayne moraine in the Ann Arbor area starting approximately 14,500 years ago.

Multiple times over the Quaternary glacial epochs, from 2.58 million years ago to the present, the Laurentide Ice Sheet was a vast sheet of ice that covered millions of square miles, including the majority of Canada and a sizable chunk of the Northern United States. Between approximately 95,000 and 20,000 years ago, when the final advance traversed the majority of northern North America, it gouged out the Canadian Shield's five Great Lakes and a plethora of smaller lakes, among other geomorphological impacts. From the eastern Northwest Territories through the majority of northern Canada, the upper Midwest of the United States (Minnesota, Wisconsin, and Michigan), the Finger Lakes, the Lake Champlain and Lake George regions of New York, across the northern Appalachians into and through all of New England, and Nova Scotia, these lakes extend. At times, the southern margin of the ice sheet extended as far south as Chicago and St. Louis, Missouri, and included the present-day locations of coastal towns in the Northeastern United States, cities like Boston and New York City, and towns along the Great Lakes. The ice sheet then followed the current course of the Missouri River up to the northern slopes of the Cypress Hills, where it merged with the Cordilleran Ice Sheet. The mid-continental latitude of 38 degrees was about where the ice coverage ceased.

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