[fidelis]

Underwater Native American sites in the Great Lakes region include significant prehistoric hunting structures discovered beneath Lake Huron and Lake Michigan, dating back approximately 9,000 to 10,000 years.
https://search.brave.com/search?q=native+american+sites+underwater+great+lakes&summary=1&conversation=50d7fdedb9e14647054081

Thanks!

[crusty old prospector]

The injuns arrived from the Bering Land Bridge about the time that the glaciers were melting. They would not have been too cozy living beneath a melting glacier. Drip, drip, drip. Ugg, fire go out again. Sure, they lived along the edges and built primitive camps.