sentences:  Since the earth rebounded from the melting glaciers more rapidly in Canada than in New York, water from Lake Ontario was spilled over New York due to its lower elevation.During this time, the original outlet of the Genesee River was flooded out, creating Irondequoit Bay.On a French map of the area from 1688 titled "Le Lac Ontario" Irondequoit Bay was referred to as the "swamp of the Senecas".