MICROFAUNAL STUDIES IN TWO DIFFERENT MARGINAL MARINE ENVIRONMENTS

MICROFAUNAL STUDIES IN TWO DIFFERENT MARGINAL MARINE ENVIRONMENTS
Author(s):
Sivaraj K, Sureshkumar M, Lakshmi Narasimhan C
Keywords:

Abstract
For the present study two core samples were collected from different environments viz., Pichavaram mangroves and Valinokkam lagoon. Aim of the study is to find vertical distribution of sediments and micro fauna in two different marginal marine environments and to bring out the depositional environment of the study area. Various analysis carried out to find CaCO3 concentration, sand silt clay ratio and microfaunal investigations. VC consists of mixture of sand, silty sand to clay sediments. Valinokkam core sample mud and foraminifera population shows positive correlation. In Vc1 core Suborder ROTALIINA constitutes 70% of total foraminifera, suborder MILIOLIINA constitutes 29 % and 1 % of foraminifera belong to Suborder TEXTULARIA. In Vc1, foraminifera population show decreasing trend towards depth. All the samples of VC are falling in the field of mixed hypersaline and normal marine lagoon environment. Two assemblage zones are identified from core sample based on abundance of foraminifera through depth. All the samples of PC are falling in the field of hypersaline lagoon environment except few samples that indicates the mixed normal marine and hypersaline environment.
Article Details
Unique Paper ID: 155503 Publication Volume & Issue: Volume 8, Issue 10 Page(s): 681 - 687
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