El Omayid Gypsum Quarry

SRC.REF: G.S.E.A.M. ABDALLAH, GEOLOGY OF SOME GYPSUM DEPOSITS IN THE NORTH WESTERN DESERT OF U.A.R., GEOL. SUR. AND MINERAL RESEARCH DEPT.M. GHANEM ABDEL AZIZ ET AL, EL OMAYID GYPSUM DEPOSIT, ANNALS OF THE G.S.E., VOL. 1, 1971