The White Desert of Egypt is located 45 km (28 mi) north of the town of
Farafra. The white desert is best viewed at sunrise or sunset, in the
light of a full moon, which gives the landscape an eerie Arctic
appearance.
The White Desert is a popular tourist spot for its dramatic and unusual
rock formations. The snow-white desert is actually made of chalk that
has been exposed for years to what geologists call "differential
weathering," the erosion of soft particles that results in eerie
protrusions of hard rock. These mushrooms shaped rock formations are ten
to fifteen feet tall. The limestone bases had been worn away by the
mixture of wind and sand that had blown by them at high speeds for
thousands of years. The differential weathering explains the very
beautiful forms that now fill the White Desert including shapes like
domes, minarets, castles, towers and so forth.
Source :- http://www.unbelievableinfo.com/2013/12/white-desert-of-egypt.html
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