Diatom assemblage characteristics in Holocene sediments of LKTH2 Borehole in Thanh Ha coastal area

Nguyễn Thị Thu Cc, Vũ Văn H, Nguyễn Minh Quảng, Nguyễn Thy Dương,
An Thị Thy, Nguyễn Thị Mịn, L Đức Lương, Dang Xuan Tung
, Mai Anh Đức

Diatom assemblage characteristics in the LKTH2 borehole of Holocence sediments contributed to clarify the Holocene environmental change during the Flandrian transgression. Diatom assemblage including 14 species identified in the LKTH2 borehole divided into 6 Diatom zones from bottom to top, from Dia 2 to Dia 6 was formed in Holocene. In which Dia 2, Dia 3 and Dia 5 zones, the Diatom fossils are common specific to different ecological environments. The forming environment is explained through the results of dividing 6 diatom zones corresponding to 6 sediment sets. The Frandian transgression and regression period in the Thanh Ha coastal are the sediment sets 2 and 5, respectively.

Keywords: Diatomeae, Quảng Tm, Thanh Ha coastal, Flandrian transgression, Holocen.