早白垩世芦尚坟组昆虫组合及沉积环境分析

An Analysis of the Entomassemblages and Sedimentary Environments of Early Cretaceous Lushangfen Formation

本文通过对早白垩世芦尚坟组昆虫组合特征的分析,探讨了芦尚坟晚期的沉积环境。结果表明,京西盆地早白垩世晚期为亚热带气候;在芦尚坟期晚期经历了水流由缓到急、古气候由干燥转变为潮湿的周期性变化。

In the present paper, the sedimentary environments of the Late Lushangfen Stage are discussed through analyzing characteristics of the entomassemblages in Lushangfen Formation. The late stage of Early Cretaceous period was subtropical climate in Jingxi Basin. During the late Lushangfen stage, the flow of river became gradually rapid and the climate became increasingly wet.