Throughout the quaternary repeated advances and retreats of polar ice caps ended in transferring of wilderness belt in the direction of the Equator that ended in extrade in the course and depth of dune-forming winds.
<h3>What is the Rub Al Khali made up of?</h3>
Rub Al Khal terrain is protected with sand dunes with heights as much as 250 meters (820 ft), interspersed with gravel and gypsum plains. The sand is of a reddish-orange color because of the presence of feldspar.
The terrain is characterized by brackish salt residences in a few areas, consisting of the Umm al Samim region at the wilderness's jap edge.
hence, Throughout the quaternary repeated advances and retreats of polar ice caps ended in transferring of wilderness belt in the direction of the Equator that ended in extrade in the course and depth of dune-forming winds.
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