The Lithostratigraphy of the Eocene exposures in the north Eastern Desert has been a subject of study for many authors. Two major stratigraphic sections are measured to clarify the facies characteristics of the studied sequence. The first section is sampled at the eastern scarp of Gabel Kahylia along the western bank of wadi Haugl. The second section is samples at Gabel Okheider along Cairo-Sukhna road. Lithostratigraphicaly; the Middle Eocene limestone (of Lutetian age) exposures in the study area are subdivided into two rock units from base to top are: 1- Minia Formation: It is recorded only in the southwestern part of the studied area at Gabel Okheider (about 40m. thick), and unconformable overlain by Mokattam Formation. In the investigated area, the Minia Formation is of Middle Eocene (Lutetian) age. 2- Mokattam Formation: It is widely distributed in the study area at both Gabel Okheider (reaches 65m.), and Gabel Kahylia (about 120m. thick). In the study area, it is mainly composed of yellowish with, thinly to thick bedded, hard limestone rich in fossils (mostly nummulitic). In the investigated area, the Mokattam Formation is of Middle Eocene (Late Lutetian) age.
