Gharbanyat Gypsum Quarry

SRC.REF: G.S.E. LABORATORIESS. TOSSON, EL GHARBANYAT GYPSUM DEPOSITS, J. GEOL. U.A.R.7, NO.1, P.72-77, 1963A.M. ABDALLAH, GEOLOGY OF SOME GYPSUM DEPOSITS IN THE NORTH WESTERN DESERT OF U.A.R., GEO. SUR. AND MINERAL RESEARCH DEPT.