依据已完成的井场调查资料，结合前人区域成果，对涠西探区的浅部地质进行工

Based on the well site survey has been completed, combined with the results of the previous area of ​​shallow geological exploration area of ​​WEIXI engineering geological layers and stratigraphic sequence division, the initial establishment of the shallow geological structure. 40m in depth below the seafloor, from top to bottom, respectively lithology silty clay, hard clay, sandy gravel layer, clay and sandy layers, respectively formed corresponding to the times for the new world of transgression, and late late Pleistocene, in early glacial and interglacial.

Based on the completed well site survey data, combined with the results of the previous region, the engineering geological layer and the ground-layer sequence of the shallow geological layer of the xii exploration area were divided, and the shallow geological structure was initially established. In the depth of 40m below the seafloor, the rock nature of the top to bottom formations is silt clay layer, hard clay layer, gravel-bearing sand layer, clay layer and sand layer, respectively, corresponding to the formation of the era for the new world sea invasion period and late, medium and early ice age.

According to the completed well site survey data and the previous regional achievements, the engineering geological layer and stratigraphic sequence division are carried out for the shallow geology of Weixi exploration area, and the shallow geological structure is preliminarily established. In the depth range of 40m below the sea floor, the lithology of the upper and lower strata are respectively muddy clay layer, hard clay layer, gravelly sandy layer, clay layer and sandy layer, corresponding to the Holocene transgression and the late, middle and early glaciation and interglaciation of late Pleistocene.<br>