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