J Integr Plant Biol. ›› 1981, Vol. 23 ›› Issue (5): -.

• Research Articles •    

Middle Cretaceous Sporo-Pollen Assemblages of Huichang Basin, Jiangxi Province

Han Xiu-pin and Jiang Qiu-qin   

Abstract: The Zhoutian Formation of Huichang Basin is a lacustrine deposit, which consists mainly of gypsum-bearing and salt-bearing fragmental rock. It may be divided into three members. The ore of rock salt of Zhoutian deposit in second member, One hundred and forty-six rock samples collected from Huichang Basin have been treated, A lot of fossil pollen and spores have been found from forty-three samples of them. Eighty-six genera and seventy-five species are reported, in which Cranwellia jiang-xiensis, Cranwellia crassusa, and Exesipollenites triangulus are described as new. According to distributive regulations of fossil pollen and spores on vertical section and level section, the Zhoution Formation may be divided in ascending order into four assemblage: 1. Classopollis parvus-Schizaeoisporites-Ephedripites-Triptyches assemblage. 2.Schizaeoisporites-Classopollis–Ephedripite-Triptyches assemblage. 3. Schizaeoisporites- Ephedripites Exesipollenites-Cranwellia assemblage, and 4. Classopollis annulatus- Schizaeoisporites- Exesipollenites pseudotriletes-Tricolporat assemblage. Based upon characteristics of sporo-pollen assemblages, the authors consider that the Zhoutian Formation should belong MiddIe Cretaceous in age. The climate at that time was warm and dry tropical-subtropical type.

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