This book presents the following geological contributions in Ediacaran and Paleozoic rocks. 1) It introduces four new rock units for the first time, the Ediacaran El Urf Formation (volcanoclastic sediments in the central Eastern Desert), the Ediacaran Abu Haswa Formation (stromatolitic dolostone in southwestern Sinai), the Early Permian Wadi Dome Formation (mixed clastics and carbonates in the west of Suez Gulf) and the Early Permian Misawag Formation (in the subsurface, northwestern Desert),  2) making correlation of the Ediacaran rock units...