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Section of the lower Genesee River from Lake Ontario to Rochester, N.Y.

Genesee River

Section of the lower Genesee River from Lake Ontario to Rochester, N.Y.

The edge of the Niagara escarpment. NS, showing the position of the ancient Iroquois Beach (IB) and the relation of the Iroquois level to that of Lake Ontario.

Niagara Escarpment

The edge of the Niagara escarpment. NS, showing the position of the ancient Iroquois Beach (IB) and…

Section of Niagara River from Lake Ontario to the Falls.

Niagara River

Section of Niagara River from Lake Ontario to the Falls.