Depositional history,contact relationships,and characterization of Upper Miocene Baogeda Ula Formation in central Nei Mongol with a description of fossil skunksOA
In addition to its well-known fossils,the Upper Miocene Baogeda Ula Formation is coupled with multiple basaltic lava flows,creating an ideal setting for studying its depositional history,geochronology,and associated vertebrate fossils.This paper,in honor of Prof.Qiu Zhanxiang for his widely admired emphasis on the geological contexts of vertebrate fossils,attempts to synthesize known contact relationships,existing K-Ar dates,and capping basalt elevations to reframe our concept of the lithostratigraphy,magnetostratigraphy,and lateral distribution of the Baogeda Ula Formation.Within this new framework,the Baogeda Ula Formation is defined by unconformable contact with the underlying Tunggur Formation at the lower boundary and a capping basalt at the upper boundary.In many sections,two or three layers of basalts are interbedded within sedimentary strata,with the capping basalts typically belonging to the top two basalts.The newly defined Baogeda Ula Formation includes a lower member as exemplified by Halajin Hushu section and Ulan Hushuyin Nur section,and an upper member at Baogeda Ula section.This expanded concept of the Baogeda Ula Formation includes two major faunas,i.e.,the Bahean Halajin Hushu Fauna and Baodean Baogeda Ula Fauna,both falling within the Upper Miocene.We also describe rare fossil skunks(Promephitis)found in recent years that support the age assessments presented herein.
WANG Xiao-Ming;SUN Lu;LI Lu;LI Qiang;QIU Zhu-Ding;Zhijie Jack TSENG
Department of Vertebrate Paleontology,Natural History Museum of Los Angeles County,Los Angeles CA 90007,USA Key Laboratory of Vertebrate Evolution and Human Origins,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044,ChinaSchool of Earth Science,East China University of Technology,Nanchang 330013,ChinaKey Laboratory of Vertebrate Evolution and Human Origins,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044,ChinaKey Laboratory of Vertebrate Evolution and Human Origins,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044,China College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,ChinaKey Laboratory of Vertebrate Evolution and Human Origins,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044,ChinaDepartment of Vertebrate Paleontology,Natural History Museum of Los Angeles County,Los Angeles CA 90007,USA Department of Integrative Biology and Museum of Paleontology,University of California,Berkeley CA 94720,USA
天文与地球科学
Nei MongolMioceneBaogeda Ula Formationstratigraphyskunks
《古脊椎动物学报(中英文)》 2026 (1)
P.100-124,25
国家自然科学基金(批准号:42372028,42374094,42430207)国家重点研发计划(编号:2023YFF0804500)资助。
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