Foraminiferal Biostratigraphy and Geological Evolution of the Thanjavur Sub-Basin, South India
Authors
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Institute of Petroleum Exploration, Oil & Natural Gas Commission, Dehra Dun
Ranjit K. Banerji
Abstract
The foraminiferal biostratigraphy of the marine Meso-Cenozoic sequence of Thanjavur sub-basin, situated in the south-western part of the Cauvery basin, is worked out in detail. On the basis of the distribution of well known planktonic and associated benthonic foraminifera, fifteen biostratigraphic zones ranging in age from Albian to Lutetian, are recognised. It is suggested that the Cretaceous-Tertiary boundary should be placed between Globotruncana gansseri - G. contusa assemblage Zone and Globorotalia velascoensis Zone in this sub-basin. The foraminiferal fauna of these zones are compared with those of the exposed marine sequence in the northern parts of the Cauvery basin. Certain aspects of inter-regional stratigraphic correlation and palaeoecology are discussed.Downloads
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References
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