*xingyu Jiang^1,2,3 (1.Asian marginal seas have played an important role in modulating regional energy and material exchanges and in deriving climatic and environmental evolutions. , 2.As an effective method, magnetostratigraphy establishes reliable geochronological framework, which is critical for reconstructing long-term history of climatic and environmental changes in the past. , 3.Due to that the previous long-term records were mainly located in the west and north Bohai Sea, thus a new Borehole HLL01, drilled in the Laizhou Bay with a length 450 m, was studied. )

*xingyu Jiang^1,2,3 (1.Asian marginal seas have played an important role in modulating regional energy and material exchanges and in deriving climatic and environmental evolutions. , 2.As an effective method, magnetostratigraphy establishes reliable geochronological framework, which is critical for reconstructing long-term history of climatic and environmental changes in the past. , 3.Due to that the previous long-term records were mainly located in the west and north Bohai Sea, thus a new Borehole HLL01, drilled in the Laizhou Bay with a length 450 m, was studied. )

*Zhiwen Shang^1,2, Fu Wang^1,2, Jianfen Li^1,2, William Marshall³, Yongsheng Chen^1,2, Xingyu Jiang^1,2, Lizhu Tian^1,2, Hong Wang^1,2 (1.Tianjin Centre, China Geological Survey (CGS), 2.Key Laboratory of Muddy Coast Geoenvironment, CGS, Tianjin, 3.School of Geography, Earth and Environmental Sciences, University of Plymouth)

*Jianfen Li ^1,2, Hong Wang^1,2, Yongsheng Chen^1,2, Fu Wang^1,2, Zhiwen Shang^1,2, Xingyu Jiang^1,2, Lizhu Tian^1,2 (1.Tianjin Center, China Geological Survey (CGS), 2.Key Laboratory of Muddy Coast Geo-Environment, China Geological Survey, CGS, Tianjin, China)