The White Desert, about 500 km southwest of the Egyptian capital Cairo, features limestone and chalk forms strangely shaped the wind and sand the landscape a charred look that contrasts with the lighter colours of the arid terrain. 1 / 9 Rocks known as 'El Mokhimat' (tents) are seen in the Old White A dry valley may develop on many kinds of permeable rock, such as limestone and chalk, or sandy terrains that do not regularly sustain surface water flow. Such valleys do not hold surface water because it sinks into the permeable bedrock. There are many examples of chalk dry valleys along the North and South
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