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A Verbeekina assemblage (Permian fusulinid) from the Baoshan Block in western Yunnan, China

Published online by Cambridge University Press:  27 April 2015

Hao Huang ,
Xiaochi Jin  and
Yukun Shi
Hao Huang
Affiliation:
Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China, 〈[email protected]〉 Key Laboratory of Stratigraphy and Paleontology, Ministry of Land and Resources, Beijing 100037, China
Xiaochi Jin
Affiliation:
Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China, 〈[email protected]〉 Key Laboratory of Stratigraphy and Paleontology, Ministry of Land and Resources, Beijing 100037, China
Yukun Shi
Affiliation:
Department of Earth Sciences, Nanjing University, Nanjing 210093, China, 〈[email protected]〉
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Abstract

A newly discovered Verbeekina assemblage from the Xiaoxinzhai Section in the Baoshan Block in western Yunnan, China, provides additional data for better understanding fusulinid biostratigraphy and the thermal condition of middle Permian (Guadalupian) seawater of this block. This assemblage comprises 11 species of six genera, including Verbeekina, Pseudodoliolina, Sumatrina, Yangchienia, Xiaoxinzhaiella, and ?Rugosochusenella. The age of this assemblage is considered to be Midian (approximately Capitanian), based on combined evidence of stratigraphic position and specific composition. Furthermore, this assemblage bears two unusual attributes: overwhelming dominance of Verbeekina and relatively low total diversity, compared with coeval fusulinids from South China, which represents a paleo-tropical setting during the middle Permian. These features indicate that the Baoshan Block was probably located in a subtropical setting with warm water during the Midian time; however, its water temperature was still not as optimal as the tropical area (e.g., South China) for the diversification of fusulinids.

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Articles
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Journal of Paleontology , Volume 89 , Issue 2 , March 2015 , pp. 269 - 280
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Copyright © 2015, The Paleontological Society 

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