ad-Dahna Desert is the central division of the Arabian Desert. It is a corridor of sandy terrain forming a bow-like shape that connects an-Nafud desert in the north to Rub' al-Khali desert in the south. Its length is more than 1000km siding Twaik Mountains from the east and does not exceed 80km in width. It is also considered the geographical margin separating Al-Ahsa Province from Najd.
Al-Dahna desert is formed of high sand dunes spreading horizontally which are called veins (ar: عروق), mostly red in color since it contains Iron Oxides.
This article incorporates text from the public domain 1907 edition of The Nuttall Encyclopædia.
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