Bioestratigrafía a partir de trilobites de las Formaciones de Balang y “Tsinghsutung” (Serie Cámbrica 2, Piso 4) en el área de Balang, Jianhe, Guizhou, China meridional

Y Zhao,J Yuan,J Esteve,S Peng,X Yang,Z Chen,M Wu

doi:10.3989/egeol.43595.574

Abstract

Se está trabajando en las formaciones de Balang y “Tsinghsutung” para encontrar un candidato adecuado para la base de la Serie 2 del Cámbrico, Piso 4. La revisión de la sistemática y zonación bioestratigáfica de los trilobites arroja luz sobre las distribuciones estratigráfica y biogeográfica de las nuevas zonas basadas en trilobites en el área de Balang (China meridional). Nuestros resultados sugieren que tanto Oryctocarella duyunensis como Arthricocephalus chauveaui podrían ser buenos candidatos, ya que también se encuentran en la Zona de Eoaagnostus roddyi-Arthricocephalus chauveaui de la Formación de Henson Gletscher, al norte de Groenlandia.

Highlights

The International Subcommision on Cambrian Stratigraphy (ISCS) has undertaken an effort to divide the Cambrian System into four series and ten stages, among which the second series, as well as the second, third, fourth and tenth stages have long remained unnamed and poorly constrained
Searching GSSP for the provisional Stage 4, Cambrian Series 2 is underway in the Jiaobang section, lying near Balang village, Jianhe County
This zone occupies the lower part of the Balang Formation and contains Oryctocarella duyunensis, Duyunaspis duyunensis, Changaspis microtype, Redlichia (Pteroredlichia) chinensis, and Probowmania balangenus

Summary

Introduction

The International Subcommision on Cambrian Stratigraphy (ISCS) has undertaken an effort to divide the Cambrian System into four series and ten stages, among which the second series, as well as the second, third, fourth and tenth stages have long remained unnamed and poorly constrained. Palabras clave: Bioestratigrafía con trilobites; Serie cámbrica 2, Piso 4; Formaciones de Balang y “Tsinghsutung”; China meridional. The trilobite biostratigraphy for the Balang and “Tsinghsutung” formations, Cambrian Series 2, Stage 4 in the Balang area, Jianhe, Guizhou, South China. The GSSP proposal for provisional Series 3 and Stage 5, based on the Wuliu-Zengjiayan section near Balang village, Jianhe, Guizhou, South China, was ratified on June 21, 2018 and was named Miaolingian Series and Wuliuan Stage.

Results

Conclusion