Measurement of Geologic Time and Stratigraphic Subdivision of Quaternary Period of Xiaoshao Plain
The depositional environment is very complex in the Quaternary Xiaoshao Plain because of the frequent alternation of sea and land.Thus,the study on the engineering geological stratigraphic subdivision of Quaternary Period in this area has important reference value and practical significance for the construc-tion of urban underground space.In this study,based on the color and lithological characteristics of the Quaternary sediments in the Xiaoshao Plain,soil samples from typical strata were selected to further study the radiocarbon ages,microsomal palaeontological species,and the abundance and distribution character-istics of different strata.The test results show that Xiaoshao Plain contains three Holocene,four Late Pleis-tocene and two Middle to Early Pleistocene sedimentary layers.The area experienced a total of four marine transgressions in the Quaternary Period,resulting in the formation of four alluvial-marine sedimentary strata and three alluvial-fluvial and alluvial-lacustrine continental sedimentary strata.The genesis of each stratum is analyzed,and a standard engineering geological stratification of Xiaoshao Plain is constructed to provide a reference basis for geological investigation in actual engineering.
万方数据
维普
