History of Sea Level Change Since Last Glacial:Reflected by Sedimentology of Core from East China Sea Inner Shelf

Abstract:

High resolution grain size analysis and 14C dating were carried on the sedimentary core MD06-3042 (27°05.4′N,121°24.1′E,water depth: 62 m,length:34.1 m) which is from East China Sea(ECS) inner shelf,a reconstruction was done on the history of the post last glacial sea level change and sedimentary change.Since 14.0 ka,the core site at 62 m was in the marine environment,and lots of Yangtze sediment had been delivered here.However,during 13.2~4.2 ka,there was low sedimentation rate here,and the main part of the modern East China Sea mud section at the site was formed between 4.2~3.2 ka.The ECS mud area should be formed step by step from north to south and from inner to the outer shelf.

Key words:grain size; inner shelf of the East China Sea; sea level change; the Yangtze River; Last Glacial