Cephalopods of the “Falang Formation” (Triassic) from Guanling and Zhenfeng Counties, Guizhou Province, China  

作　　者：HAO Weicheng, SUN Yuanlin, JIANG Dayong, YANG Shouren and WANG Xinping Geological Museum, Peking University, Beijing 100871 

出　　处：《Acta Geologica Sinica(English Edition)》2003年第4期430-439,共10页地质学报（英文版）

摘　　要：The 'Falang Formation' of western Guizhou was previously called the 'Halobia Bed' and considered to be I .adinian in age. It was subdivided upward into the Zhuganpo, Laishike and Longchang members based on ammonites and the Trachyceras multitubertulatum Zone of the Longchang Member was put in the Lower Carnian. Here in the present paper, 4 genera and 9 species of ammonites and 1 nautiloid genus and species collected from the upper part of the 'Falang Formation' (i.e. the Wayao Formation used in this paper, equivalent to the Laishike Member from Guanling and Zhenfeng counties are described. The geological and geographical distribution of these cephalopods, as well as the co-existing conodonts, put the Wayao Formation to the late early Carnmian.The 'Falang Formation' of western Guizhou was previously called the 'Halobia Bed' and considered to be I .adinian in age. It was subdivided upward into the Zhuganpo, Laishike and Longchang members based on ammonites and the Trachyceras multitubertulatum Zone of the Longchang Member was put in the Lower Carnian. Here in the present paper, 4 genera and 9 species of ammonites and 1 nautiloid genus and species collected from the upper part of the 'Falang Formation' (i.e. the Wayao Formation used in this paper, equivalent to the Laishike Member from Guanling and Zhenfeng counties are described. The geological and geographical distribution of these cephalopods, as well as the co-existing conodonts, put the Wayao Formation to the late early Carnmian.

关 键 词：AMMONITES nautiloids 'Falang Formation' CARNIAN TRIASSIC GUIZHOU China 

分 类 号：Q915[天文地球—古生物学与地层学]