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Precambrian–Cambrian boundary candidate, Meishucun, Jinning, Yunnan, China

Published online by Cambridge University Press:  01 May 2009

Xing Yusheng  and
Luo Huilin
Xing Yusheng
Affiliation:
Institute of Geology, Chinese Academy of Geological Sciences, Baiwanzhuang Road, Beijing, China
Luo Huilin
Affiliation:
Institute of Geological Sciences of Yunnan Province, Kunming, China
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Abstract

Being located in Jinning County, Yunnan Province, approximately 103° E, 25° N, the Meishucun section has a long history of study, convenient accessibility, mild spring-like climate all the year round and good exposures of the relevant strata. In the particular area there occur monofacial transitional carbonate deposits of marine origin, yielding in great abundance both small shelly fossils and trace fossils, which are present in close association and in some cases on the same bedding surface. The sequence of biotic assemblages is clearly evident and can be used for wide intercontinental correlation.

In the lower part of the Qiongzhusi Stage, stratigraphically higher, there appear the oldest trilobites, archaeostracods and Baltisphaeridium characteristic of the Early Cambrian.

During the last six years great progress has been made in the study of the particular section through lithostratigraphic, biostratigraphic, geochronological, magnetostratigraphic and seismostratigraphic approaches, thus making the Meischucun Stage and the Sinian–Cambrian boundary stratotype section in the Meishucun area a Chinese candidate for global stratotype section and point for the Precambrian–Cambrian boundary.

Type
Articles
Information
Geological Magazine , Volume 121 , Issue 3 , May 1984 , pp. 143 - 154
Copyright
Copyright © Cambridge University Press 1984

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