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Abstract

Four major sedimentary environments have been identified in the Shanghai area which were deposited over the past 7,000 years, 3 to 20 meters above a Pleistocene basal clay. These are marsh, lagoon, recurved spit and tidal flat. The morphology west of Shanghai is a fresh water marsh since it was not transgressed by rising Holocene sea levels. In the central area, a recurved spit and lagoon had developed from 6,500 years B.P. to 3,500 years B.P. However, the tidal flat has characterized coastal sedimentation in the eastern part of Shanghai since 3,000 years B.P.

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