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Can bathymetry be a discriminatory factor for the distribution of benthic foraminiferal morpho-groups in modern marine sediments?

DRS at CSIR-National Institute of Oceanography

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Title Can bathymetry be a discriminatory factor for the distribution of benthic foraminiferal morpho-groups in modern marine sediments?
 
Creator Nigam, R.
Khare, N.
Mayenkar, D.N.
 
Subject marine sediment
West Coast of India
 
Description The foraminiferal content of one hundred eight modern marine sediment samples off Vengurla-Cochin sector (ranging in water depth from 30 to 1330 m). West Coast of India was studied. A total of two hundred four foraminiferal species (comprised of one hundred eighty benthic and twenty-four planktonic species) were recorded. Based on the external morphology, the benthic foraminiferal population was clubbed into two coarser morphogroups namely, angular-asymmetrical and rounded-symmetrical. The distribution profiles of these morpho-groups in the surface sediments apparently showed that angular-asymmetrical morpho-group is more or less abundant in deeper regions while, rounded-symmetrical morpho-group tends to flourish in relatively shallower regions. Such characteristic pattern indicates depth control over the external morphology of benthic foraminifera. Therefore, if these morpho-groups are studied in the subsurface, sediments may show great potential in generating proxy data for paleodepth.
 
Date 2006-09-25T05:42:34Z
2006-09-25T05:42:34Z
2000
 
Type Journal Article
 
Identifier ONGC Bulletin, vol.37(1), 47-51p.
http://drs.nio.org/drs/handle/2264/417
 
Language en
 
Format 79244 bytes
application/pdf
 
Publisher ONGC, India