Abstract
A brief summary is given of the origin and geological history of the Red Sea Graben area, based on personal observations in Egypt during the periods 1937–1940 and 1947–9. The author is inclined to believe that the graben zone was formed in its initial stages at the end of the L. Eocene; the movements continued at least till Pleistocene times. The mechanism of the graben is explained as a combination of regional shearing faults together with regional updoming followed by stretch-faulting.

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