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Holocene Biostratigraphic Zones Corresponding Litho-Chronostratigraphy, Environment of Deposition and Successive Changes in the Geomorphology of Bengal Basin, India during Last 10,000 Years
Department of Botany, Bankim Sardar College, South 24 Parganas, West Bengal, India
Department of Botany, University of Calcutta, Kolkata, India
- 1 Department of Botany, Bankim Sardar College, South 24 Parganas, West Bengal, India
- 2 Department of Botany, University of Calcutta, Kolkata, India
International Journal of Geosciences·Volume 07 (2016)·Pages 615–629·Published 19 April 2016·DOI10.4236/ijg.2016.74047
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Abstract
Biostratigraphic Zones Bb. Bz. H. I-V distinguished in C 14 dated Peat, peaty clay sediments above arid, Barren zone have identified distinct environment of deposition as fresh water mixed brackish water to shallow marine to brackish water mangrove swamp, brackish water mixed fresh water swamp followed by colonization of non-littoral species to fresh water swamp during Holocene in the Bengal basin, India in chronological succession. The successive phases of depositional environment have identified the events of sea level rise, marine transgression and sea ward movement of the sea. The unique database has explored successive changes in the geomorphology of South Bengal from upland dry to marine deltaic environment to fresh water upland condition.
KeywordsHoloceneBiostratigraphyFlandrian TransgressionGeomorphologyBengal Basin
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