Dr. Nagy I. Zoltán szerk.: Fragmenta Mineralogica Et Palaentologica 7. 1976. (Budapest, 1976)

upper biozone characterized by the presence of N. atacicus

, N. discorbinus and Orbitolites pharaonum

. EL-NAGGAR (1970) suggested the term "Libyan Desert Group" for the rocks overlying the Esna Shale unit and subdivided it as follows: from base to top: ( a. Gurnah Calcareous Shale Member. ( The Luxor*Formation ( ( ( b. Thebes limestone Member. Libyan Desert ( Group

. ( ( ( Drunka Formation. Fig. 1