Middle Cambrian Diplocraterion parallelum from North China: Ethologic significance and facies controls

Zhang Lijun; Buatois Luis M.; MáNGANO Gabriela M.; Qi yongan; Tai Chao

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Middle Cambrian Diplocraterion parallelum from North China: Ethologic significance and facies controls

Zhang Lijun 1 *,Buatois Luis M. 2,MáNGANO Gabriela M. 2,Qi yongan 1,Tai Chao 1

1.Institute of Resources and Environment, Henan Polytechnic University, Jiaozuo 454003

2.Department of Geological Sciences, University of Saskatchewan, Saskatoon, Canada S7N 5E2

*Correspondence author

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Funding: Natural Science Foundation of China （No.Nos.41602112, 41472083, 41290260), the Specialized Research Fund for the Doctoral Program of Higher Education）

Opened online: 5 May 2017

Accepted by: none

Citation: Zhang Lijun,Buatois Luis M.,MáNGANO Gabriela M..Middle Cambrian Diplocraterion parallelum from North China: Ethologic significance and facies controls[OL]. [ 5 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4730535

The middle Cambrian Mantou Formation of the Mianchi section of western Henan Province, North China provides an opportunity to address infaunal colonization during the aftermath of the Cambrian explosion. The trace fossil Diplocraterion is common within intertidal very fine-grained sandstone of the Member II of the Mantou Formation (Stage 5). Diplocraterion consists of perpendicular to bedding plane, lined U-shaped burrows with well-developed marginal tubes, having distinctive, dark and light colored, laminae forming retrusive and protrusive spreiten reflecting the activity of a suspension feeder. No scratches are observed on the wall of the marginal tubes. SEM-EDS mapping detection shows that the dark laminae are dominated by Si, Al and Fe, whereas the light laminae are dominated by Ca and Si. Based on ichnological, stratigraphical and SEM-EDS features, it is suggested that the specimens of Diplocraterion studied here results from the equilibrium behavior and that the delayed appearance of this ichnotaxon in North China is due to lack of appropriate siliciclastic facies.

Keywords:Diplocraterion; Cambrian; Colonization; North China; Mianchi

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