this post was submitted on 11 Dec 2023
120 points (99.2% liked)

Michigan

262 readers
1 users here now

total subscribers

Si quaeris peninsulam amoenam in braccas mea vide

   🫴

      ✋

Banner photos credits

founded 2 years ago
MODERATORS
[email protected]
120
Great Lakes (libranet.de)
submitted 11 months ago by [email protected] to c/[email protected]
22 comments fedilink hide all child comments
 

There have been 6,000 shipwrecks in the great lakes, take that Bermuda triangle!

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 20 points 11 months ago (3 children)

For anyone that didn't know, Lake Superior is that deep because it is a failed mid-continental rift. That means that at some point, way in the past, North America almost split in two, and Lake Superior would have been another ocean between the two halves. This is what created the Keweenaw peninsula

[–] [email protected] 8 points 11 months ago

The continent was actually Laurentia back then. Lake Ontario, the St Lawrence Valley and the Gulf of St Lawrence are all part of the same rift.

Lakes Michigan, Huron and Erie are all the shorelines of ancient seas that were ringed by coral. This left behind soft Calcite rock that the glaciers carved away.

[–] [email protected] 4 points 11 months ago

You don't mess with Canada's shield

[–] [email protected] 2 points 11 months ago (1 children)

this is the first time I have heard of this. Do you have a recommendation on this here to learn more about it?