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    The terrace like feature in the mid-continental slope region off Trivandrum and a plausible model for India-Madagascar juxtaposition in immediate pre-drift scenario

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    Gondwana_Res_10_179.pdf (382.6Kb)
    Date
    2006
    Author
    Yatheesh, V.
    Bhattacharya, G.C.
    Mahender, K.
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    Abstract
    Bathymetry of the southwestern continental margin of India reveal the presence of an anomalous terrace like feature in the mid continental slope region off Trivandrum. The genesis of this terrace of large areal extent (~9000 sq. km.) is yet to be established. Based on exercises with several existing paleogeographic reconstruction models and updated compilation of identified offshore tectonic elements, this study attempts to identify a plausible model of India–Madagascar juxtaposition in immediate pre-drift scenario, which provides idea about genesis of this terrace. It is inferred that the terrace off Trivandrum and an anomalous bathymetric notch located in the northern Madagascar Ridge are conjugate features related to India-Madagascar separation and the rifted and sheared segments of the pre-drift plate boundary have shaped their outlines. The drifting of India from Madagascar is suggested to have commenced at about 86.5 Ma.
    URI
    http://drs.nio.org/drs/handle/2264/217
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