1. Faculty of Geo‐Information Science and Earth Observation (ITC) University of Twente Enschede The Netherlands
2. Geology Department, Faculty of Science Helwan University Cairo Egypt
3. Department of Earth Sciences Utrecht University Utrecht The Netherlands
4. Botswana Geoscience Institute Lobatse Botswana
5. Department of Geosciences Pennsylvania State University University Park PA USA
6. School of Geosciences The University of the Witwatersrand Johannesburg South Africa