1. Center of Excellence in Morphology of Earth Surface and Advanced Geohazards in Southeast Asia (MESA CE), Department of Geology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
2. Mineral Resources Regional Office 2, Department of Mineral Resources, Khon Kaen, Thailand
3. Laboratory PALEVOPRIM, UMR CNRS 7262, University of Poitiers, Brunet, Cedex, France
4. Department of Geosciences, Biogeology, University of Tübingen, Tübingen, Germany
5. Senckenberg Research Centre for Human Evolution and Palaeoenvironment (S-HEP), University of Tübingen, Tübingen, Germany