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Discussion of ‘The Triassic U–Pb age for the aquatic long-necked protorosaur of Guizhou, China’

Published online by Cambridge University Press:  05 November 2014

Y. B. Wang ,
D. T. Yang ,
D. Y. Liu ,
J. Han ,
L. T. Wang  and
J. X. Yao
Y. B. Wang*
Affiliation:
Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China Beijing SHRIMP Center, Chinese Academy of Geological Sciences, Beijing 100037, China
D. T. Yang
Affiliation:
Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China Beijing SHRIMP Center, Chinese Academy of Geological Sciences, Beijing 100037, China
D. Y. Liu
Affiliation:
Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China Beijing SHRIMP Center, Chinese Academy of Geological Sciences, Beijing 100037, China
J. Han
Affiliation:
Beijing Research Institute of Uranium Geology, Beijing 100029, China
L. T. Wang
Affiliation:
Geological Survey of Guizhou Province, Guiyang 550005, China
J. X. Yao
Affiliation:
Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China
*
corresponding author Y. B. Wang E-mail: wangyanbin@bjshrimp.cn
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Extract

We thank Liu Jun for his comment on our recent paper (Wang et al. 2014) and are grateful for his calling our attention to this apparent contradiction, and we welcome the opportunity to reply. Based on the sensitive high-resolution ion microscope (SHRIMP) U–Pb zircon age for a volcanic tuff bed within the upper part of the Guanling Formation, we suggested in our study that the age of the fossil horizon of the Panxian fauna is 244 ± 1.3 Ma, which is 14 Ma earlier than the previously estimated age that Li, Rieppel & LaBarbera (2004) published in Science. However, Liu Jun argued that this conclusion is confused, that there is no 14 Ma difference and that there is agreement between the biostratigraphic data and the new radiometric age.

Keywords

Panxianreptileextinctionrecovery
Type
Discussion
Information
Geological Magazine , Volume 152 , Issue 3 , May 2015 , pp. 574
Copyright
Copyright © Cambridge University Press 2014 

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References

Li, C., Rieppel, O. & LaBarbera, M. C. 2004. A Triassic aquatic protorosaur with an extremely long neck. Science 305, 1931.CrossRefGoogle ScholarPubMed
SUN, Z. Y., HAO, W. C. & JIANG, D. Y. 2003. Conodont stratigraphic evidence for the age of the Guanling fauna, Guizhou Province, China. Acta Scientiarum Naturalium Universitatis Pekinensis 39, 118–25 (in Chinese with English abstract).Google Scholar
Sun, Z. Y., Sun, Y. L., Hao, W. C. & Jiang, D. Y. 2006. Conodont evidence for the age of the Panxian Fauna, Guizhou, China. Acta Geologica Sinica 80, 621–30.Google Scholar
Wang, Y., Yang, D., Han, J., L., W., Yao, J. & Liu, D. M. 2014. The Triassic U–Pb age for the aquatic long-necked protorosaur of Guizhou, China. Geological Magazine 151, 749–54.CrossRefGoogle Scholar