Journal of Palaeogeography     2019 8 (3):  301-305    ISSN: 2095-3836  CN: 10-1041/P Words of the Editor-in-Chief —— Some ideas about the comments and discussions of hyperpycnal flows and hyperpycnites Zeng-Zhao Feng* China University of Petroleum (Beijing), Beijing 100083, China Received: 2019-04-04  Revised: null  Online: null Supporting info null