东北那达哈达岭硅质岩中的三叠纪牙形刺

TRIASSIC CONODONTS FROM THE CHERTS OF NADANHADA RANGE, NORTHEAST CHINA

本文首次描述了采自黑龙江那达哈达岭硅质岩中的三叠纪牙形刺Ｎｅｏｓｐａｔｈｏｄｕｓｃｆ．ｄｉｅｎｅｒｙ，Ｎ．ｋｏｃｋｅｌｉ，Ｎｅｏｇｏｎｄｏｌｅｌｌａｍｏｍｂｅｒｇｅｎｓｉｓ，Ｃａｒｉｎｅｌｌａｍｕｎｇｏｅｎｓｉｓ，Ｍｅｔａｐｏｌｙｇｎａｔｈｕｓｃｆ．ｐａｒｖｕｓ，从而确定了硅质岩的地质时代。

Early (?),Middle and Late Triassic conodonts have been found for the first time in cherts from Nadanhada Range of Heilongjiang Province, including Neospathodus cf,dienery Sweet,N. kockeli(Tatge),Neogondolella mombergensis (Tatge),Carinella mungoensis(Diebel),and Metapolygnathus cf.parvus Kozur.I have determined the stratigraphic position of the beds enclosing the conodonts found and compared them with the coeval conodont zones of other regions.