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Researches on Plants from the Lower Devonian Xujiachong Formation in the Qujing District, eastern yunnan

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Acta Geologica Sinica(English Edition) 2002年第4期76卷 393-407页

作者：王德明郝守刚刘振锋 School of Earth and Space Sciences Peking University Beijing 100871

Fossil plants Hedeia sinica Hao et Gensel 1998, Huia gracilis Wang Ct Hao2001 and Guangnania cuneata Wang et Hao are described from the Lower Devonian Xujiachong Formation,the Qujing district, eastern yunnan, China. They contribute to our knowledge of the flora in thisdistrict. Based on the occurrence of common plants (Hedeia, Huia, Guangnania and Zosterophyllumaustralianum) and their horizons, it is proved for the first time that the mid-lower assemblage ofthe Xujiachong flora is comparable with the Early Devonian ((late) Pragian) Posongchong flora ofsoutheastern yunnan and the upper Baragwanathia flora of Australia. In view of this fact and thestratigraphic sequence, the mid-lower part of the Xujiachong Formation is considered to be of (late)Pragian age. Through comprehensive analyses of plant, bivalve and fish assemblages and thelithology, the upper part of the Xujiachong Formation is dated to he of early Emsian age. TheXujiachong flora belonged to the northeastern Gondwana palaeophytogeographic unit during the EarlyDevonian. The early Emsian assemblage of this flora inherited the characters of the Posongchongflora and also exhibited the endemic elements. Belonging to different phytogeographic units, theXujiachong and Posongchong floras differ from the coeval flora of the Laurussian *** Xujiachong flora is comparatively simple in composition, while the Posongchong flora hasabundant and highly diversified endemics. The disparity between them has resulted from the differentenvironments.

关键词： Fossil plants Xujiachong Formation eastern yunnan (late) Pragian-earlyEmsian similarity between floras phytogeography and environment

Discovery of Trace Fossils from the Sinian-Cambrian Boundary Beds in eastern yunnan and Their Significance for Global Correlation

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Acta Geologica Sinica(English Edition) 1993年第4期67卷 429-442,481-483页

作者： Yin Jicheng, Li Daqing and He Tinggui Chengdu College of Geology, Chengdu, Sichuan Fei Zhenbi Chengdu College of Geology Chengdu Sichuan

There are abundant and highly varied trace fossils in the Sinian-Cambrian boundary beds in eastern yunnan. Collections from 27 sections and their study give altogether 45 ichnogenera and 87 ichnospecies. Among them, 2 ichnogenera and 7 ichnospecies are new, and 31 known ichnogenera and 38 known ichnospecies first found in the region. According to their order of appearance in the boundary beds and their assemblage features, the trace fossils in the Sinian-Cambrian boundary beds in the region may fall into 4 trace fossil assemblage zones in ascending order. In the paper they are correlated with those in the equivalent horizons abroad and their geological significance is discussed preliminarily.

关键词： Sinian-Cambrian boundary beds trace fossil ichnogenus ichnospecies assemblage zone eastern yunnan

CARBONIFEROUS-PERMIAN BOUNDARY BEDS AND FUSULINID ZONES AT XIAODUSHAN, GUANGNAN, eastern yunnan

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微体古生物学报 1987年第2期 146-157页

作者： Zhou Tie-ming(Institute of Petroleum and Geological Sciences, yunnan Province) Sheng Jin-zhang and Wang Yu-jing(Nanjing Institute of Geology and Palaeontology, Academia Sinica)

The Xiaodushan section is situated at about 5 km from the Babao village in Guangnan County in eastern yunnan. In this section, the stratigraphic suecession from Lower Carboniferous to Middle Permian is continuous and ex-

关键词： eastern yunnan GUANGNAN CARBONIFEROUS-PERMIAN BOUNDARY BEDS AND FUSULINID ZONES AT XIAODUSHAN 微体古生物学小独山二叠系广南周铁 AT

THE GUANSHAN FAUNA—A NEW SOFT-BODIED FAUNA FROM THE EARLY CAMBRIAN OF eastern yunnan

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THE GUANSHAN FAUNA—A NEW SOFT-BODIED FAUNA FROM THE EARLY C...

A New Diverse Macrofossil Lagersttte from the Uppermost Ediacaran of Southwestern China

第二届国际古生物学大会

作者： Shixue HU , Huilin LUO yunnan Institute of Geological Scienses, Kunmimg, yunnan, China.

The Guanshan fauna is a new soft-bodied fauna discovered in recent years from the early Cambrian of eastern yunnan. The interval containing the nonmineralised fossils of the Guanshan fauna is the Wulongqing Formation (previously assigned to the Wulongqing Member of the Canglanpu Formation). Lithologicatly, the Wulongqing Formation is composed of mudstones interbeded with siltstones. Most of the fossils are recov-

关键词： Guanshan fauna Early Cambrian softbodied eastern yunnan

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Acta Geologica Sinica(English Edition) 2008年第6期82卷 1095-1103页

作者： TANG Feng YIN Chongyu LIU Pengju GAO Linzhi ZHANG Wenyan Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 Key Laboratory of Stratigraphy and Paleontology Chinese Academy of Geological Sciences Beijing 100037 China Travel Service Head Office Beijing 100081

A new macrofossil Lagerstatte was discovered from the uppermost Ediacaran Jiucheng Member at Jinning and Jiangchuan of the eastern yunnan, yielding numerous diverse well-preserved thallophyte macrofossils. These include the previously-known representatives of vendobionts, Vendotaenia and Tyrasotaenia, and the biggish multicellular benthos such as Chuaria-like and Tawuia- like fossiis, as well as Longfengshaniaceaens with diverse holdfast structures. There are still some other problematic macrofossils with peculiar configurations as well as uncertain relatives. The distinct dominance of the giant, unbranching thallophytes occasionally with holdfast structures distinguishes this assemblage from the other Ediacaran macrofossil Lagerstattes in the Doushantuo Formation at Miaohe, Wenghui and Lantian, and the contemporary assemblage in the Shibantan Member of Dengying Formation, Yangtze Gorges area. This paper outlines the characteristics of some of the multicellular macrofossils from the Jiucheng Member at Jiangchuan. They include some macrofossils with different types of holdfast structure, larger Chuaria-like and Tawuia-like morphology and questionable affinities as well. The discovery of greater diverse macrofossil assemblages from the Jiucheng Member of eastern yunnan has further indicated that an important diversification and evolutionary radiation of metaphytes took place in the latest Ediacaran time. This radiation of largescale, benthic metaphyte along with phytoplankton was likely important contributors to the early Cambrian explosion of metazoans.

关键词： eastern yunnan Late Ediacaran Jiucheng Member diverse macrofossils

Enigmatic ribbon-like fossil from Early Cambrian of yunnan, China

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China Geology 2021年第2期4卷 205-214页

作者： Feng Tang Si-cun Song Guang-xu Zhang Ai-lin Chen Jun-ping Liu Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Department of Earth Sciences University College LondonLondon WC1E6BTUnited Kingdom yunnan Key Laboratory For Palaeobiology Kunming 650091China Research Center of Paleobiology Yuxi Normal UniversityYuxi 653100China yunnan Institute of Geological Survey Kunming 650216China

During the Late Neoproterozoic and Early Cambrian,a series of paleogeographic and paleoecological events occurred associated with deglaciations and the evolution of *** appearance of fossils representing diverse phyla,novel body plans and complex ecologies in Ediacaran and Cambrian sedimentary successions has sparked diverse hypotheses about potential drivers for the radiation of early animals during this ***,new macroscopic fossils of carbonaceous compressions with unique features have been found in Anning,yunnan,*** fossils’bodies are ribbon-shaped and bilaterally symmetric,with dense longitudinal features and transversal *** fossils occur 0.68 m below a bentonite interlayer which has been dated 535.2±1.7 Ma by Ri-xiang Zhu and his team in *** relatively simply morphology of these fossils,coupled with a lack of preserved internal structures challenge efforts taxonomically identify the precursor organism and definitively ally it to a living ***,the symmetry and unusual features of the body are analogous to members of *** presence of ribbon-shaped fossils in the Zhongyicun Member in Anning indicates that these organisms were at least a locally significant component of Cambrian seafloor ecosystems,and may hold important implications for our understanding of the early evolution of Bilateria.

关键词： Early Cambrian Platyhelminthe Bilateria Macrofossil eastern yunnan Geological survey engineering