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前言这篇短文论述1958年至1959年调查北京西郊第四纪砾石层的一部分成果。当时野外工作的主要目的是对该砾石层的结构—构造特征,进行观测和研究,以期为西山及山麓平原第四纪地质作用的性质,提供有关的参考资料。此项工作是在李四光教授亲自指导下进行的。
Preface This essay discusses some of the results of a survey of Quaternary gravel layers in the western suburbs of Beijing from 1958 to 1959. At that time, the main purpose of field work was to observe and study the structure-structure features of this gravel layer in order to provide references for the nature of the Quaternary geological processes in the Xishan and Foothills plain. This work is carried out under the personal guidance of Professor Li Siguang.