1. Department of Geosciences, University of Tübingen, 72076 Tübingen (Germany) and Geology Department, Faculty of Science, Mansoura University, 35516 Mansoura (Egypt)
2. Halliburton, 97 Jubillee Avenue, Milton Park, Abingdon, OX14 4RW (United Kingdom)
3. Senckenberg Forschungsinstitut und Naturmuseum Frankfurt, Senckenberganlage 25, 60325 Frankfurt am Main (Germany)