For example, headward erosion by the Shenandoah River in the U . S . state of Virginia, a tributary of the Potomac River, permitted the Shenandoah to capture successively the original upstream segments of discharge, it accelerated the process of headward erosion until the Shenandoah captured all drainage to the Potomac west of the Blue Ridge Mountains.
22.
For example, headward erosion by the Shenandoah River in the U . S . state of Virginia, a tributary of the Potomac River, permitted the Shenandoah to capture successively the original upstream segments of discharge, it accelerated the process of headward erosion until the Shenandoah captured all drainage to the Potomac west of the Blue Ridge Mountains.
