Coastal and Sea-level Changes During the Holocene in Bangladesh

Author(s): Dr. M. Shahidul Islam   Michael J. Tooley  

Journal Name: Quaternary International

Volume & Link: 55

Publisher: International Union for Quaternary Research, Elsevier

Year: 1999

Abstract:

The aim of the study is to reconstruct the Holocene sea-level history along a section of the coast of Bangladesh. Detailed litho-, bioand chronostratigraphic techniques have been applied to unveil the nature of sedimentary sequences in association with the events of the Holocene marine transgressions and regressions. Samples were collected from Panigati near Khulna. The study provides evidence of five periods of marine transgression, each followed by a regression, during the Holocene. Each minerogenic sediment layer indicates a marine episode and the sediments were deposited under intertidal to estuarine conditions. Each peat layer is in situ and indicates a regression of the sea. It is difficult to separate the regional eustatic components contributing to these relative sea-level movements, although processes operating locally and regionally are clearly evident. A sea-level curve together with possible error ranges, has been proposed for this part of Bangladesh. Since the early to mid-Holocene, an average relative sea-level rise of 1.07 mm/yr has been estimated.

Citation:

Islam M. S. and Tooley, M. J. (1999) Coastal and Sea-level Changes During the Holocene in Bangladesh, Quaternary International 55, 61-75

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