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The Late Eocene sporopollen of the Yuanqu Basin in Shanxi Province has been studied, and four sporopollen assemblages are established, in which two of them are mainly composed of pollen of angiosperm and gymnosperm, the third is mainly composed of spores of pteridophyte, and the last is of fresh water algae spores.Based on the character of the palynoflora, the Late Eocene flora, paleoclimate and paleoenviroment of the Yuanqu Basin are discussed. This Late Eocene flora belongs to the transitional flora from temperate zone to tropical zone (transitional floral region from Portawa Floral Realm and Durgai Floral Realm). The character of paleoclimate in Late Eocene of this region is from a teinperate and humid subtropical to mild temperate zone climate. The global temperature declining event has a certain reflection in this region. The oscillation of arid climate occurs as well. During Late Eocene, lakes and marshes widely distributed in this region, and further more, the lakes and marshes frequently alternated with dry lands, appearing 3 or more times.
The Late Eocene sporopollen of the Yuanqu Basin in Shanxi Province has been studied, and four sporopollen assemblages are established, in which two of them are mainly composed of pollen of angiosperm and gymnosperm, the third is mainly composed of spores of pteridophyte, and the last is of fresh water algae spores. Based on the character of the palynoflora, the Late Eocene flora, paleoclimate and paleoenviroment of the Yuanqu Basin are discussed. This Late Eocene flora belongs to the transitional flora from temperate zone to tropical zone (transitional floral region from Portawa Floral Realm and Durgai Floral Realm). The character of paleoclimate in Late Eocene of this region is from a teinperate and humid subtropical to mild temperate zone climate. The global temperature declining event has a certain reflection in this region. The oscillation of arid climate occurs as well. During Late Eocene, lakes and marshes widely distributed in this region, and further more, the lakes and marshes frequently alternated with dry lands, appearing 3 or more times.