About 13,000 years ago the melting glaciers that covered Minnesota and Canada created a vast lake, bigger than all the Great Lakes of today combined

https://www.minnpost.com/mnopedia/2025/02/the-draining-of-glacial-lake-agassiz/

created by minn_post on 03/02/2025 at 16:30 UTC

47 upvotes, 7 top-level comments (showing 7)

Comments

Comment by ChackChaludi at 03/02/2025 at 17:00 UTC

6 upvotes, 0 direct replies

The glacial history of this area is endlessly fascinating to me.

The ancient raised beaches, the giant valley of the Minnesota, the St. Croix potholes, glacial erratics - stuff it isn't even possible to imagine happened right here and you can still find evidence (like our lakes) everywhere.

Comment by thatswhyicarryagun at 03/02/2025 at 18:20 UTC

3 upvotes, 0 direct replies

The beaches of Lake Agassiz have been a huge source of sand and gravel in the red river valley and beyond.

Comment by oldMNman at 03/02/2025 at 18:20 UTC

3 upvotes, 0 direct replies

More evidence of global warming.

Comment by _still_truckin_ at 03/02/2025 at 17:11 UTC

1 upvotes, 0 direct replies

The waterfall in St Paul must have been spectacular.

Comment by chrispybobispy at 03/02/2025 at 17:46 UTC

1 upvotes, 0 direct replies

I love geology its amazing to think of what the ground beneath us has been through and the evidence it leaves behind. It's humbling.