Lake Chippewa
{{for| the lake in Wisconsin| Lake Chippewa (Wisconsin) }}
{{Infobox body of water
| name = Lake Chippewa
| image = Chippewa and Stanley Low Levels (Larsen 1987).jpg
| caption = Glacial Lakes Chippewa, Stanley, Early Erie and Early Ontario. Low level lake stages during the end of the Wisconsin Glacial era in North America. Based on Larsen map, 1987.
| coords ={{coord|44|-87|region:US_type:waterbody_scale:5000000|display=title}}
| location = North America
| group = Great Lakes
| lake_type = former lake
| etymology = Chippewa People
| inflow = Laurentide Ice Sheet
| outflow = Grand River valley in Michigan
| basin_countries = Canada
United States
| date-flooded = 9,500 years before present
| length = {{convert|220|mi|km|abbr=on}}
| width = {{convert|30|mi|km|abbr=on}}
| area =
| depth =
| max-depth =
| volume =
| residence_time = 7300 years in existence
| shore =
| elevation = {{convert|230|ft|m|0|abbr=on}}{{cite map |publisher= Randall Schaetzl, Michigan State University |title= Glacial Lakes Chippewa and Stanley |url= http://geo.msu.edu/extra/geogmich/chippewa.html|edition= |section= |accessdate= January 27, 2020}}
| islands =
| islands_category =
| cities =
| reference =United States Geological Survey, George Otis Smith, Director; The Pleistocene of Indiana and Michigan and the History of the Great Lakes; Frank Leverett and Frank B. Taylor; Department of the Interior, Monographs of the United States Geological Survey; Volume LIII; Washington; Government Printing Office; 1915
| pushpin_map =Michigan
| pushpin_label_position = “right”
| pushpin_map_caption =
}}
Lake Chippewa was a prehistoric proglacial lake. The basin is now Lake Michigan. It formed about 10,600 years before present (YBP). The lake occupied the depression left by the Michigan Lobe of the Laurentide Ice Sheet.University of Wisconsin, Green Bay, Dept of Geology{{full citation needed|date= June 2014}}
Origin
File:Mackinac Channel and Falls.png
The lake formed from glacial Lake Algonquin as water levels dropped, occupying only the deepest parts of the Lake Michigan basin. The waters drained through the Straits of Mackinac, then across Lake Stanley into either Lake Hough and then to the St. Lawrence River by way of the Ottawa River valley, or through the St. Clair and Detroit rivers to an Early Lake Erie and out the Niagara River towards the St. Lawrence. Around 10,300 YBP, Lake Chippewa’s levels continued to drop, and the basin was a self-contained body of water without an outlet. Levels returned and Lake Chippewa again flowed through the canyon at Mackinac until around 7,500 YBP. At that time, the Nipissing Great Lakes merged with the waters in the Michigan Basin and created a single lake encompassing all three of the upper Great Lakes.
Size
Somewhat smaller than Lake Michigan, Lake Chippewa extended through most of the Michigan Basin, north to the Straits of Mackinac, where there was a narrow channel which conveyed the lake's outflow over the now submerged Mackinac Falls to Lake Stanley. Its shoreline ranged from {{convert|10|–|30|mi|km}} out from the present day Lake Michigan shore.
See also
References
{{reflist}}
External links
- {{cite map |publisher= Randall Schaetzl, Michigan State University |title= Glacial Lakes Chippewa and Stanley |url= http://geo.msu.edu/extra/geogmich/chippewa.html|edition= |section= |accessdate= January 27, 2020}}
Category:Moraines of the United States