1. Department of Geosciences The Pennsylvania State University University Park PA USA
2. Department of Geology and Geological Engineering Colorado School of Mines Golden CO USA
3. Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China
4. CAS Center for Excellence in Life and Paleoenvironment Beijing China
5. Department of Ecosystem Science and Management The Pennsylvania State University University Park PA USA
6. Earth and Environmental Systems Institute The Pennsylvania State University University Park PA USA