The Genesee is the remaining western branch of a preglacial system, with rock layers tilted an average of 40 feet (12 m) per mile, so the river flows across progressively older bedrock as it flows northward.
The Genesee is the remaining western branch of a preglacial system, with rock layers tilted an average of per mile. INFO IS CONTRADICTORY:, so the river flows across progressively older bedrock as it flows northward.