Affiliation: | 1. State Key Laboratory of Loess and Quaternary Geology, IEE, CAS, , Xi'an, 710075 P.R. China;2. School of Human Settlement and Civil Engineering, Xi'an Jiaotong University, , Xi'an, 710049 P.R. China;3. Department of Geological Sciences, Indiana University, , Bloomington, IN, 47405‐1405 USA |