Maumee Beach
Appearance

Maumee Beach, the remains of the shoreline of proglacial lake Lake Maumee, was laid down approximately 14,000 years ago.[1]
The North American Great Lakes, are recent lakes, formed in hollows following the recession of the Laurentian Glacier.[1]
Glacial runoff from the Glacier formed proglacial lakes with different depths, shorelines, sources and outlets than the current lakes.[1] Glacial rebound played a role, because it takes millenia for the underlying crust to bounce back, after the great weight of the glaciers have been removed. Another factor is that remaining lobes of glacial ice blocks the track of outlets.
Lake Maumee was deeper than Lake Erie.[1]