1. 宁夏六盘山地区马东山组孢粉组合特征及其对恐龙生活古气候的指示意义.
- Author
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潘进礼, 李振宏, 马 杰, 史保胤, 谢 非, 马瑞赟, 张奋发, and 张玉瑜
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GLOBAL warming , *MESOZOIC Era , *CRETACEOUS Period , *PALEOCLIMATOLOGY , *DINOSAURS , *FERNS , *FOSSIL collection , *FOSSIL plants - Abstract
Complete dinosaur footprint fossils are preserved on the surface of the fluvial and lacustrine sediments of Early Cretaceous Madongshan Formation in Liupanshan area of Ningxia, and the sporopollen is a good carrier to study the paleoclimate information of the time when dinosaurs lived. A systematic sporopollen study was carried out on the fossil occurrence profile of sauropod dinosaur footprints from Cretaceous Madongshan Formation in Qianzhuang village of Longde county, Liupanshan area. A total of 41 genera and 63 species of sporopollen were identified. It is divided into 3 sporopollen assemblages from bottom to top of the profile, including Bisaccates-Jiaohepollis assemblage, Classopollis-Jiaohepollis-Cicatricosisporites assemblage and Cicatricosisporites-Foraminisporis assemblage. The geological age reflected by the characteristics of the sporopollen assemblage is Early Cretaceous Aptian-Albian period. The established vegetation of dinosaurs footprint fossils has undergone a transition from conifers to cypresses, and then to ferns. Further research suggests that the paleoclimate in the age of dinosaurs experiences a change from subtropical subhumid climate to subtropical warm and semi-arid climate, and then to subtropical humid climate. This is consistent with previous research conclusions on sedimentary paleoclimatic environment of Cretaceous Madongshan Formation in Liupanshan area. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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