SUMMARY

Stratigraphy of the Quaternary in the Sóc Trăng coastal and littoral areas

Vũ Trường Sơn, Nguyễn Biểu, Trịnh Thanh Minh,

Trịnh Nguyên Tính, Lê Anh Thắng, and Trần Trọng Trịnh

The interpretation of shallow seismicity - high resolution lines of the coastal and littoral areas and the Định An River bed, and the study on drill cores in the Hậu River bed and tidal flats have been helping to discover 9 disconformity surfaces (R2-R10, with 7 in Pleistocene and 2 in Holocene). In stratigraphic columns, these surfaces are the same in the two forms of materials: seismic and drilling ones, and can be used in the Quaternary stratigraphic correlation. The velocity of acoustic waves in the area is of 1700 m/sec. According to the sequence stratigraphy, 9 sedimentary sequences have been divided, lying between reflection planes, and 4 formations have been established: D Fm (S1-2) – Q₁¹; C Fm (S3-4) – Q₁²; B Fm (S5-6) – Q₁³; A Fm (S7-9) – Q₂^1-3, equivalent to seismic members D, C, B and A, which were suggested previously in literatures.

Ngày nhận bài: 7/9/2009

Người biên tập: TS. Hoàng Anh Khiển

(Cục Địa chất và Khoáng sản Việt Nam).