An-Nafūd

West of the Great Nafud, the desert around Wadi al-Qalibah is a country of exposed sandstone and dry channels. The rocks of the Tabuk formation stretch from the sand sea toward the Jordanian frontier. In places, erosion has cut their level beds into mesas and isolated hills, while wadis divide the broad stony surface. Wadi al-Qalibah can carry powerful floods when heavy rain falls over the Tabuk country.