How did the ice age create rivers in north america?

Explanation:

the Teays River, the Ohio River and Mid North America before and after the last ice age. The topography of North America was consider different from what it is now before the last ice age. The Great Lake formed from the melting glaciers. ... Lake Agassiz developed due to river flows blocked by the glaciers.

("credit to sjsy for the help of the answer")

answer called a epicycle;