Evidence for large-scale subglacial meltwater flood events in southern Ontario and northern New York State

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Abstract
Flow-line patterns constructed from the orientation of drumlin long axes are used to infer two major subglacial meltwater floods in southern Ontario and northern New York State. In this interpretation, the flood waters of the first event, the Algonquin, surged southward. In the later, Ontarian event, powerful floods streamed southwestward along the basins of Lakes Ontario and Erie. Bedrock fluting, upstream-pointing noses on escarpments, and tunnel channels give supporting evidence for the regional flood hypothesis. Regional distributions of drift thickness may be explained by this hypothesis.

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