First results of the biostratigraphy and geochronology of the classic Nihewan Fauna, China

Frontiers in Earth Science

Earth Science

Arya Farjand¹  Shundong Bi²  Zhaoqun Zhang³  Philip L. Gibbard⁴ 

[1] Centre for Vertebrate Evolutionary Biology, School of Life Sciences, Yunnan University, Kunming, China;Centre for Vertebrate Evolutionary Biology, School of Life Sciences, Yunnan University, Kunming, China;Department of Biology, Indiana University of Pennsylvania, Indiana, PA, United States;Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Palaeoanthropology, Chinese Academy of Sciences, Beijing, China;College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China;Scott Polar Research Institute, University of Cambridge, Cambridge, United Kingdom;

关键词: Nihewan Basin;    classic Nihewan Fauna;    Nihewan Formation;    Xiashagou;    early pleistocene;    biostratigraphy;   

DOI  :  10.3389/feart.2023.1276816

 received in 2023-08-13, accepted in 2023-09-25,  发布年份 2023

来源: Frontiers

【 摘 要 】

The Nihewan Basin is infilled by a relatively complete Pliocene to Pleistocene sequence, rich mammalian fossils and containing many Palaeolithic artefacts, implying that it is a unique location for Quaternary multidisciplinary study. Fossil excavations in these deposits have been carried out for nearly a century. The systematic study of the fossils by Teilhard de Chardin and Piveteau in 1930 laid the foundations for the classic Nihewan Faunal assemblage, which has been widely followed as a standard for the Early Pleistocene biochronology in eastern Asia. With the availability of magnetostratigraphic analyses on several sections in the Nihewan basin, a comprehensive geochronological study is timely pending. Here we report the results of a comprehensive survey of the Xiashagou section, where the classic Nihewan Fauna was discovered. By synthesising the lithostratigraphical, biostratigraphical, and magnetostratigraphical information, together with measurements taken by the authors, the total thickness of the Nihewan Formation in the Xiashagou section being 116 m. Furthermore, the geochronological study demonstrates that the classic Nihewan Fauna was originally recovered from at least 6 fossil horizons, spanning from ∼2.4 Ma to ∼1.8 Ma, i.e., the early Early Pleistocene. The new evidence from the Xiashagou section also suggests several cycles of fluctuations in the biodiversity and population of the classic Nihewan Fauna during the early Pleistocene. The preliminary correlation of these cycles matches the short periods of glaciation in the early Pleistocene.

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Copyright © 2023 Farjand, Zhang, Gibbard and Bi.