| 张掖国家地质公园白垩系下沟组叶肢介化石的发现及古生态与古环境 |
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| 关键词:Zhangye National Geopark Hongshan Bed Conchostracans fossils analysis of paleoecological environment |
| 基金项目:甘肃省地质勘查基金项目“甘肃省特殊景观区典型地质剖面综合调查研究”(编号: 2018-143) |
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| 摘要: |
| Discovery and Paleoecological and Paleoenvironmental Environment of the Conchostracans from the Cretaceous Xiagou Formation in Zhangye National Geopark |
| The Cretaceous monotype basin in Hongshanwan area of Zhangye National Geopark is an important part of Zhangye–Mingle basin. In this paper, the Early Cretaceous Xiagou conchostracans fossils were reported for the first time, which included 1 species and 3 undetermined species: Eosestheria ovate, E.sp. Combined with the fossils of Cladophlebis, Podozamites and previous isotopic dating results, it is believed that the deposits in Hongshanwan area of the geopark belong to Aptian Stage and should be in the middle and late Aptian period. Through the measurement of individual 8 characteristic parameters of the leaf segments, by using the PAST software for general statistical analysis and multivariate statistical analysis, according to the ecological system, and in combination with micro-plant fossils found in the field, the authors divided the early Cretaceous red valley basin into aquatic system and land ecosystem, thus making restoration and reconstruction of the paleoenvironment and paleoecology of the sedimentary basin. |
| ZHONG Xin,SUN Xin-chun,GU Ping-yang,LI Xiao-qiang,LIU Sha,LIU Ye.2020.Discovery and Paleoecological and Paleoenvironmental Environment of the Conchostracans from the Cretaceous Xiagou Formation in Zhangye National Geopark[J].Acta Geoscientica Sinica,41(4):543-553. |
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