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Rejuvenation
 

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Rejuvenation (river)




One example is the Nile , which was rejuvenated when the Mediterranean Sea dried up in the late Miocene . Its base level dropped from sea level to over 2 miles below sea level. It cut its bed down to several hundred feet below sea level at Aswan and 8000 feet below sea level at Cairo . After the Mediterranean re-flooded, those gorges gradually filled with Silt .