- GeoRef, Copyright 2004, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
"The lower part of the limestone succession of the Hagab monocline in the Oman peninsula, Arabia, is divided into the Bih dolomite (Permian, 650 m.), Hagil limestone (Permian, 260 m.), Ghail limestone (Trias, 600 m.), and the Elphinstone beds (Noric, 431 m.). The latter consists of five formations, two of which are very fossiliferous. The succession also occurs to the south in borings in the forelands of the Oman mountains and is similar to that of the foreland of the Zagros range of Iran."