Rock magnetism of the Upper Ordovician Zhaolaoyu Formation of the southern Ordos Basin oleh Shuqi LAN, Bitian WEI, Longyun XING, Nan DU, Xiangang LENG, Nan JIANG, Xin CHENG, Qinglong CHEN, Baofeng WANG, Pengxiang XU, Xiaohong DENG, Dongmeng ZHANG, Teng LI, Feifan LIU, Hanning WU