Note 73 — Chapter IX · GEOGRAPHY OF RED SEA AND FOUNDATIONS OF THE REEF SYSTEMS
Reading edition
The gypsum often found between the sandstone and the coral was most probably formed by the drying up of a shallow sea which occupied the site before the Rift Valley appeared, and probably the sandstones are the sediments deposited in the same sea; also parts of the present maritime plain were formed as the shore deposits of this ancient sea.