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Authors
Affiliations
1 Department of Geology, National College, Tiruchirapalli, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 63, No 3 (2004), Pagination: 299-312
Abstract
Foraminiferal distribution of the Coleroon i iver estuary, Tamil Nadu is studied by statistical 'Factor Analysis' Fortius study, 56 sediment and bottom water samples were collected from 14 stations, once in thiee months repiesenting foui seasons In ordei to study the relationship between foiaminifera and present day environment, living fonns alone are considered 56 foiaminiferal species belonging to 31 genera have been identified of which 13 are arenaceous agglutinated, 11 aie calcareous porcelaneous and remaining 32 are calcareous perfoiate forms
In the present woi k three assemblages alone are taken since they explain more than 93% of the total variance From factor analysis, it is infeired that there are two distinct assemblage zones in all the seasons The first and dominant assemblage zone is highly loaded in station 5 and is influenced by greater depth, higher salinity values, associated with higher fines (gieatei than 30% silt and clay) and highei CaCO., content of the substrate The second zone is predominant in station 1 and is influenced by the sandy substrate, lesser fines and lesser organic matter of the substrate.
Keywords
Benthic Foraminifera, Factor analysis, Coleroon Estuary, Tamil Nadu.
