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Global Geology 2016, 19(4) 255-276 DOI:
ISSN: 1673-9736 CN: 22-1371/P |
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Episodes of subaerial Large Igneous Provinces (LIPs) linked to late Turonian/late Maastrichtian deep incursion of sea on the Indian continental block |
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Syed A. Jafar |
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National Centre for Antarctic and Ocean Research (NCAOR) Headland Sada,Vasco-da-Gama,Goa-403804,India |
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Abstract:
Late Cretaceous sea inundation of major continents,surprisingly did not affect Indian block except by two major subaerial events of Large Igneous Provinces (LIPs). Marion hotspot induced LIP of Mahajanga Flood Basalt (ca.92 Ma) in Madagascar triggered high intensity earthquake along Narmada Lineament and permitted a short lived marine transgression during late Turonian with spectacular estuarine deposits of limited thickness, preserved as archive of“Greenhouse Climatic Record”. Réunion hotspot induced LIP of Deccan Flood Basalt, stretching from western to eastern India around Rajahmundry area attracted worldwide attention for the unique fauna and flora preserved in the intertrappean beds straddling Cretaceous-Palaeogene boundary. This massive subaerial LIP (ca. 66Ma) permitted fairly deep penetration of sea along collision facing Subathu-Dogadda Line- ament during late Maastrichtian-Danian,but due to thick vegetation cover,tectonic disturbance and scarce out- crops the evidence is less straightforward than along Narmada rift. |
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Keywords:
LIPs
marine incursions
Indian Block
late Turonian-Narmada Basin Lineament
Late Maastrici- tian-Subathu Dogadda Lineament
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Received Revised Online: |
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