1. Department of Geological Engineering, Faculty of Engineering; Middle East Technical University; Ankara; Turkey
2. Paleomagnetic Laboratory Fort Hoofddijk, Department of Earth Sciences; Utrecht University; Utrecht; Netherlands
3. School of Geosciences; University of Aberdeen; Aberdeen; UK
4. CEREGE, UMR 6635; Université Aix-Marseille III, CNRS; Aix-en-Provence; France