Delaware Water
The Delaware Water Gap is a steep, narrow valley cut through a structurally deformed high ridge...?
The Delaware Water Gap is a steep, narrow valley cut through a structurally deformed high ridge in the Appalachian Mountains. How could it have formed?
It could have formed as a river running across a low-relief plain that previously covered the valley-and-ridge topography that now dramatically defines the region. As this sedimentary cover eroded away, the river would have begun cutting down slowly through the ridge over time. As long as no other more gravitationally advantageous route for the river opened up, it would have continued cutting down through the ridge until at last all the sedimentary cover was gone. That would be what we see today.
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