PETROLOGICAL CHARACTERISTICS AND SEDIMENTARY ENVIRONMENT OF THE YANKOU FORMATIONINTHE UPPER ORDOVICIAN AT TONGLU AREA IN ZHEJIANG PROVINCE
He Youbin Gao Zhenzhong Li Jianming
JOURNAL OF PALAEOGEOGRAPHY . 1999, (3): 65 -72 .  DOI: 10.7605/gdlxb.1999.03.008