1. Max Planck Institute for Chemistry Mainz Germany
2. Department of Geology and Geophysics King Saud University Riyadh Saudi Arabia
3. Scripps Institution of OceanographyUCSD La Jolla CA USA
4. Qassim Unit, Heritage CommissionMinistry of Culture Buraydh Saudi Arabia
5. Department of Archaeology College of Tourism & Archaeology King Saud University Riyadh Saudi Arabia