Aqua-Plano Indians of the Upper Great Lakes
In 1950 archeological investigations in this area uncovered a site which had been used as a workshop camp by a group of the earliest known people in this part of the Upper Great Lakes basin. Called Aqua-Plano Indians because they migrated from the western plains to fossil beaches of glacial and post-glacial lakes in this region, they appeared about 9,000 years ago following the retreat of glaciers and the northward movement of plants and animals. They developed a distinctive tradition based primarily on large game hunting using weapons and specialized tools made of taconite, a stone that was obtained locally. Their way of life, which was closely related to the environment, disappeared as the climate grew warmer.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.