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    Deterioration of Early Holocene coral reef due to sea level rise along west coast of India: Benthic foraminiferal testimony

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    Geosci_Front_3_697a.pdf (1.189Mb)
    Date
    2012
    Author
    Mazumder, A.
    Nigam, R.
    Henriques, P.J.
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    Abstract
    A total of 103 surface sediment samples collected from the water depth range of 15-3300 m along Vijaydurg-Karwar stretch of central west coast of India were analyzed for foraminiferal content. Relict benthic foraminiferal assemblage was noted within 50-135 m water depth. The relict benthic foraminiferal assemblage that includes Amphistegina, Operculina and Alveolinella in sediment samples within the water depth of 85-135 m indicates presence of coral reef at this depth during Early Holocene. The presence of barnacle fouling on Relict foraminifera at 60-90 m confirms the paleo-shoreline. The shallow depth zone is characterized by presence of agglutinated relict foraminifera. The agglutinated forms indicate freshwater influx, which eventually increased the sea level and subsequently deteriorated the paleo-coral reef.
    URI
    http://drs.nio.org/drs/handle/2264/4161
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