This is because the desert in the region normally has a crust, what Arabs call "the desert skin," consisting of sand and clay particles that have been baked together, or sintered, by the heat and sun.
Poušť v této oblasti je běžně pokryta krustou, kterou Arabové nazývají "kůží pouště." Ta se skládá z částic písku a jílu, jež se spekly horkem a sluncem.