sentences:  While age calculation for the Nubian Sandstone is relatively simple in Lebanon, Anti-Lebanon and Hermon, it is much more complicated in Western Sinai and the Dead Sea area.Since sandstone is assumed to form more rapidly than other rocks it is difficult to conceive that the 2,000 feet of sandstone in the southeastern Dead Sea was in the formative process from the Cambrian to the Cretaceous.Nubian Sandstone is most commonly brown or reddish, but in places it shows a much wider variety of color.