Ohio River

The Ohio River is a principal tributary of the Mississippi River, 1,579 km (981 mi) long in the eastern United States.

Pre-history

The Ohio River was formed by glacial meltwater from the last stage of this ice age, the Wisconsin glaciation. During the glacial retreat, the river was temporarily dammed just southwest of Louisville, Kentucky, creating a large lake until the dam burst. The Ohio River largely supplanted the former Teays River drainage system, which was disrupted by the glaciers. Today, the river still follows a significant portion of the old Teays River course in southernmost Ohio.

Related Topics:
Wisconsin glaciation - Louisville, Kentucky - Teays River

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