1. Department of Geology, Faculty of Science, Port Said University, Port Said, Egypt
2. Department of Geology, Faculty of Science, Benha University, Benha, Egypt
3. Institute of Geological Sciences, University of Kiel, Kiel, Germany
4. Department of Geology, Section of Earth Materials, University of Patras, Patras, Greece
5. Department of Geological Sciences, Rutgers University, New Brunswick, New Jersey, USA