Editing Great Lakes (section)

===Large bays and related significant bodies of water===
* [[Lake Nipigon]], connected to Lake Superior by the [[Nipigon River]], is surrounded by [[layered intrusion|sill-like formations]] of [[mafic]] and [[ultramafic rock|ultramafic]] [[igneous rock]] hundreds of meters high. The lake lies in the [[Nipigon Embayment]], a [[Aulacogen|failed arm]] of the [[triple junction]] (centered beneath Lake Superior) in the [[Midcontinent Rift System]] event, estimated at 1.1 billion years ago.
* [[Thunder Bay (Ontario)|Thunder Bay]] is a large bay on the north shore of Lake Superior bordered to the east by the [[Sibley Peninsula]] in northern Ontario.
* [[Chequamegon Bay]] is an inlet of Lake Superior south of the [[Apostle Islands]] and the [[Bayfield Peninsula]] in northern Wisconsin.
* [[Keweenaw Bay]] is an arm of Lake Superior southeast of the [[Keweenaw Peninsula]].
* [[Whitefish Bay]] is a large bay on the eastern end of Lake Superior which leads to the outflow of the lake into the [[St. Marys River (Michigan–Ontario)|St. Marys River]].
* [[Lake Winnebago]], connected to Green Bay by the [[Fox River (Green Bay tributary)|Fox River]], serves as part of the [[Fox–Wisconsin Waterway]] and is part of a larger system of lakes in Wisconsin known as the [[Winnebago Pool]].
* [[Green Bay (Lake Michigan)|Green Bay]] is an arm of Lake Michigan along the south coast of the [[Upper Peninsula of Michigan]] and the east coast of Wisconsin. It is separated from the rest of the lake by the [[Door Peninsula]] in Wisconsin, the [[Garden Peninsula]] in Michigan, and the chain of islands between them, all of which were formed by the [[Niagara Escarpment]]. The north end of Green Bay consists of [[Big Bay de Noc]] and [[Little Bay de Noc]].
* [[Grand Traverse Bay]] is an arm of Lake Michigan on Michigan's west coast and is one of the largest natural harbors in the Great Lakes. The bay is divided into east and west arms by the [[Old Mission Peninsula]].<ref>{{cite web |url = http://www.peninsulatownship.com |title = Home |publisher = Peninsula Township |access-date = December 7, 2016 }}</ref> The bay has one major island, [[Power Island]]. Its name is derived from [[Jacques Marquette|Jacques Marquette's]] crossing of the bay from [[Norwood, Michigan|Norwood]] to [[Northport, Michigan|Northport]] which he called ''La Grande Traversee''.{{citation needed|date=May 2016}}
* [[Georgian Bay]] is an arm of Lake Huron, extending northeast from the lake entirely within Ontario. The bay, along with its narrow westerly extensions of the [[North Channel (Ontario)|North Channel]] and [[Mississagi Strait]], is separated from the rest of the lake by the [[Bruce Peninsula]], [[Manitoulin Island]], and [[Cockburn Island (Ontario)|Cockburn Island]], all of which were formed by the Niagara Escarpment.
* [[Lake Nipissing]], connected to Georgian Bay by the [[French River (Ontario)|French River]], contains two [[volcanic pipe]]s, which are the [[Manitou Islands (Lake Nipissing)|Manitou Islands]] and [[Callander Bay]].<ref>{{cite web |url = http://home.cogeco.ca/~nananne/backgroundgeology/070211-BackgroundGeology-w.html |title = Background Geology of the North Bay area |archive-url = https://web.archive.org/web/20100724012748/http://home.cogeco.ca/~nananne/backgroundgeology/070211-BackgroundGeology-w.html |archive-date = July 24, 2010 |access-date = September 24, 2007 }}{{self-published inline|certain=yes|date=March 2024}}</ref> These pipes were formed by a violent, [[supersonic eruption]] of deep origin. The lake lies in the [[Ottawa-Bonnechere Graben]], a [[Mesozoic]] [[rift valley]] that formed 175&nbsp;million years ago.
* [[Lake Simcoe]], connected to Georgian Bay by the [[Severn River (central Ontario)|Severn River]], serves as part of the [[Trent–Severn Waterway]], a canal route traversing [[Southern Ontario]] between Lakes Ontario and Huron.
* [[Thunder Bay (Michigan)|Thunder Bay]] is a bay on the west side of Lake Huron in Michigan.
* [[Saginaw Bay]], an extension of Lake Huron into the [[Lower Peninsula of Michigan]], fed by the [[Saginaw River|Saginaw]] and other rivers, has the largest contiguous freshwater [[wetland]] in the United States.<ref>{{Cite web |url = https://www.epa.gov/greatlakes |title = The Great Lakes |id = REG 05 |date = August 20, 2015 |publisher = Environmental Protection Agency }}</ref>
* [[Lake St. Clair]], connected with Lake Huron to its north by the [[St. Clair River]] and with Lake Erie to its south by the [[Detroit River]]. Although it is 17 times smaller in area than Lake Ontario and only rarely included in the listings of the Great Lakes,<ref name=LakeStClair>{{cite web |url = http://www.great-lakes.net/lakes/stclairReport/summary_00.pdf |title = Lake St. Clair summary report |archive-url = https://web.archive.org/web/20160416124842/http://www.great-lakes.net/lakes/stclairReport/summary_00.pdf |archive-date = April 16, 2016 |website = Great Lakes.net |access-date = December 2, 2007 }}</ref><ref name="U.S.Army">{{cite web |url = http://www.lre.usace.army.mil/_kd/Items/actions.cfm?action=Show&item_id=4310&destination=ShowItem |title = Chapter 1:Introduction to Lake St. Clair and the St. Clair River |access-date = June 8, 2008 |publisher = U.S. government U.S. Army |date = June 2004 |archive-url = https://web.archive.org/web/20090110202934/http://www.lre.usace.army.mil/_kd/Items/actions.cfm?action=Show&item_id=4310&destination=ShowItem |archive-date = January 10, 2009 }}</ref> proposals for its official recognition as a Great Lake are occasionally made, which would affect its inclusion in scientific research projects designated as related to "The Great Lakes".<ref>{{cite news |url = https://www.latimes.com/archives/la-xpm-2002-oct-20-na-stclair20-story.html |title = Movement Would Thrust Greatness on Lake St. Clair |newspaper = [[Los Angeles Times]] |date = October 20, 2002 }}</ref>
* [[Sandusky Bay]] is a bay on Lake Erie in northern Ohio.
* [[Long Point, Ontario|Long Point Bay]] is a bay on the north shore of Lake Erie in Ontario.
* [[Hamilton Harbour]] is a harbor on the western tip of Lake Ontario.
* The [[Bay of Quinte]] is a long and narrow bay on the north shore of Lake Ontario.