Lake Monongahela
Lake Monongahela was a proglacial lake in western Pennsylvania, West Virginia, and Ohio. It formed during the Pre-Illinoian ice epoch when the advance of the ice sheet southwards blocked the drainage of these valleys to the north.
Lake Monongahela was a proglacial lake in western Pennsylvania, West Virginia, and Ohio. It formed during the Pre-Illinoian ice epoch when the advance of the ice sheet southwards blocked the drainage of these valleys to the north.
Lake Monongahela was a proglacial lake in western Pennsylvania, West Virginia, and Ohio. It formed during the Pre-Illinoian ice epoch when the advance of the ice sheet southwards blocked the drainage of these valleys to the north.
Source: Wikipedia "Lake Monongahela" · CC BY-SA 4.0
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