Journal of Palaeogeography     2020 9 (3):  314-334    ISSN: 2095-3836  CN: 10-1041/P Provenance of upper Permian-lowermost Triassic sandstones, Wutonggou low-order cycle, Bogda Mountains, NW China: implications on the unroofing history of the Eastern North Tianshan Suture Dong-Yu Zheng, Wan Yang* Geology and Geophysics Program, Missouri University of Science and Technology, Rolla, Missouri 65409, U.S.A. Received: null  Revised: null  Online: null Supporting info null