中国四川南部牛牛寨段早寒武世小骨骼化石的生物地层学研究

IF 1.7 3区地球科学 Q2 PALEONTOLOGY

Palaeoworld Pub Date : 2024-09-12 DOI:10.1016/j.palwor.2024.09.001

Lei Yang, Ben Yang, Yu-Ning Yang, Michael Steiner

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引用次数: 0

摘要

中国四川南部雷波县牛牛寨地段是长江地块西部碳酸盐岩平台的一部分。该剖面对于关联云南东部和四川南部地区的早寒武世演替至关重要。通过对该剖面小骨骼化石的综合生物地层分析，确定了三个小骨骼化石组合：(1)朱家清地层中、上岱海统中最古老的一个年代不确定的区间；(2)朱家清地层上岱海统中的Watsonella crosbyi组合区（Ⅲ区）；(3)石岩头地层中统中的Sinosachites flabelliformis-Tannuolina zhangwentangi组合区（Ⅳ区）。牛牛寨断面中的这些SSF组合带与云南东部和四川南部的断面有很好的相关性，表明长江地台和其他大陆上有一个连贯的泰伦卢演替。

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Biostratigraphy of the early Cambrian small skeletal fossils from the Niuniuzhai section of southern Sichuan in China

The Niuniuzhai section in Leibo County, southern Sichuan, China, is part of the western carbonate platform of the Yangtze Block. The section is crucial for correlating early Cambrian successions in the eastern Yunnan and southern Sichuan areas. A comprehensive biostratigraphic analysis of small skeletal fossils (SSFs) from this section identifies three SSF assemblages: (1) the oldest from an interval of uncertain age affinity in the middle and upper Dahai Member of the Zhujiaqing Formation; (2) the Watsonella crosbyi Assemblage Zone (Zone Ⅲ) in the upper Dahai Member of the Zhujiaqing Formation; and (3) the Sinosachites flabelliformis–Tannuolina zhangwentangi Assemblage Zone (Zone IV) in the middle Shiyantou Formation. These SSF assemblage zones in the Niuniuzhai section correlate well with sections from eastern Yunnan and southern Sichuan, indicating a coherent Terreneuvian succession on the the Yangtze Platform and in other continents.

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来源期刊

Palaeoworld PALEONTOLOGY-

CiteScore

4.00

自引率

5.90%

发文量

期刊介绍： Palaeoworld is a peer-reviewed quarterly journal dedicated to the study of past life and its environment. We encourage submission of original manuscripts on all aspects of palaeontology and stratigraphy, comparisons of regional and global data in time and space, and results generated by interdisciplinary investigations in related fields. Some issues will be devoted entirely to a special theme whereas others will be composed of contributed articles. Palaeoworld is dedicated to serving a broad spectrum of geoscientists and palaeobiologists as well as serving as a resource for students in fields as diverse as palaeobiology, evolutionary biology, taxonomy and phylogeny, geobiology, historical geology, and palaeoenvironment. Palaeoworld publishes original articles in the following areas: •Phylogeny and taxonomic studies of all fossil groups •Biostratigraphy, chemostratigraphy, chronostratigraphy •Palaeoecology, palaeoenvironment and global changes throughout Earth history •Tempo and mode of biological evolution •Biological events in Earth history (e.g., extinctions, radiations) •Ecosystem evolution •Geobiology and molecular palaeobiology •Palaeontological and stratigraphic methods •Interdisciplinary studies focusing on fossils and strata