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Cephalopods of the “Falang Formation” (Triassic) from Guanling and Zhenfeng Counties, Guizhou Province, China
Author(s) -
Weicheng HAO,
Yuanlin SUN,
Dayong JIANG,
Shouren YANG,
Xinping WANG
Publication year - 2003
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.2003.tb00124.x
Subject(s) - ladinian , china , genus , paleontology , geology , geography , archaeology , ecology , biology , structural basin
The “Falang Formation” of western Guizhou was previously called the “ Halobia Bed” and considered to be Ladinian 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 Carnian.