Page:Africa by Élisée Reclus, Volume 1.djvu/364



To the west of the Nile, whose long silver band, skirted with green, stretches in two great curves across Nubia, rise mountains similar in formation to those of the east — primitive rocks, sandstone cliffs, and volcanic lavas and scoriæ. The

highest groups of summits, Jebel-Magaga, Jebel-Gekdul, and Jebel-Gilif, occupy precisely the centre of the immense circuit, three-fourths of which are described by the course of the Nile between the Sixth Cataract and Dabbeh. Their peaks are said to attain a height of from 3,330 to 3,660 feet. The whole of the space