1. What is the geological history of the Ohio River, and how does this history explain why the Ohio River gorge is so deep? (See Ohio Pleistocene History and Ray, 1974)
The geological history of the Ohio River started during the Pleistocene Epoch or the Ice Age. This period happened some 2 million years ago and ended 10000 years ago which then started the Holocene Epoch. The first documented deposits in Ohio were the glaciers of the Pleistocene. During the latter part of the Permian Era, erosion and non-deposition started and the entire Tertiary Period led to no record
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