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    Coastal Response to Changes in Sea Level since the Last 4500 BP on the East Coast of Tamil Nadu, India

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    Author
    Achyuthan, Hema
    Baker, V. R.
    Issue Date
    2002-01-01
    Keywords
    landform evolution
    shorelines
    clay mineralogy
    clay minerals
    sheet silicates
    Tamil Nadu India
    coastal sedimentation
    shore features
    sea level changes
    cores
    sedimentation
    Foraminifera
    Protista
    reconstruction
    Holocene
    microfossils
    biostratigraphy
    silicates
    sediments
    Asia
    India
    Cenozoic
    Quaternary
    Indian Peninsula
    C 14
    carbon
    dates
    isotopes
    radioactive isotopes
    shells
    Invertebrata
    absolute age
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    Citation
    Achyuthan, H., & Baker, V. (2002). Coastal response to changes in sea level since the last 4500 BP on the east coast of Tamil Nadu, India. Radiocarbon, 44(1), 137-144.
    Publisher
    Department of Geosciences, The University of Arizona
    Journal
    Radiocarbon
    URI
    http://hdl.handle.net/10150/654468
    DOI
    10.1017/S0033822200064730
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    Abstract
    Geomorphology, clay mineral composition, and radiocarbon dates from Muttukadu to Marakkanam estuaries and the tidal zone along the east coast of Tamil Nadu, India, have been used to reconstruct coastal evolution between approximately 4500 and 1100 BP. Formation of alternate oyster beds with intervening tidal clay units indicate fluctuation in the sea level may be a consequence of changes in the Mid-Holocene sedimentation pattern and coastal configuration. 14C dates from Muttukadu indicate a rapid relative sea-level rise (RSL) subsequent to 3500 BP and tidal flat sedimentation between 3475 and 3145 BP. Marine conditions along the east coast area returned around 1900 BP. Comparison of dates with other sites, e.g. Muttukadu, Mammallapuram, and Marakkanam, points toward short removal of marine conditions, ample sediment supplies in the tidal zones, and neotectonic activity. Reactivation of the north-south trending fault line occurred not earlier than approximately 1050 BP. Our study indicates that Middle to Late Holocene coastal sedimentation and the chronology of the tidal zone formation have been strongly influenced by local factors. These have provided considerable scope for internal reorganization with changing coastal processes.
    Type
    Article
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S0033822200064730
    Scopus Count
    Collections
    Radiocarbon, Volume 44, Number 1 (2002)

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