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Holocene Sea-level Scenarios in Bangladesh

  • Towhida Rashid

Part of the SpringerBriefs in Oceanography book series (BRIEFSOCEAN)

Table of contents

  1. Front Matter
    Pages i-vi
  2. Towhida Rashid
    Pages 1-10
  3. Towhida Rashid
    Pages 11-33
  4. Towhida Rashid
    Pages 51-60
  5. Towhida Rashid
    Pages 71-78

About this book

Introduction

This Brief deals with the reconstruction of Holocene paleoenvironment in the central part of Bangladesh in relation to relative sea-level (RSL) changes which is 200 km north from the present coastline. Lithofacies characteristics, mangal peat, diatom and paleophysiographical evidences were considered to reconstruct the past position and C-14 ages were used to determine the time of formation of the relative sea-level during the Holocene. With standard reference datum the required m.s.l. at the surface of five sections are calculate and the RSL curve suggests that Bangladesh has experienced two mid Holocene RSL transgressions punctuated by regressions. The abundant marine diatom and mangrove pollens indicates that the highest RSL transgression in Bangladesh is around 6000 cal BP which is attained at least 4.5 to 5m higher than the modern m.s.l. After this phase, the relative sea-level started to fall and consequently a freshwater peat developed around 5980―5700 cal BP. The abundant mangrove pollens in salt-marsh succession shows the regression around 5500 cal BP and, the height was 1―2 m higher than the modern sea level. These and more interesting findings are discussed in this Brief.

Keywords

C-14 Ages Diatom Holocene Sea-level Lithofacies Mangal Peat Mean Sea-level (msl) Paleoenvironment Paleophysiographical Evidences Relative Sea-level (RSL)

Authors and affiliations

  • Towhida Rashid
    • 1
  1. 1.Geography and EnvironmentUniversity of DhakaDhakaBangladesh

Bibliographic information

  • DOI https://doi.org/10.1007/978-981-4560-99-3
  • Copyright Information The Author(s) 2014
  • Publisher Name Springer, Singapore
  • eBook Packages Earth and Environmental Science
  • Print ISBN 978-981-4560-98-6
  • Online ISBN 978-981-4560-99-3
  • Series Print ISSN 2196-1212
  • Series Online ISSN 2196-1220
  • Buy this book on publisher's site
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