Record Details

Planktonic foraminifera from core tops of western equatorial Indian Ocean

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Planktonic foraminifera from core tops of western equatorial Indian Ocean
 
Creator Naidu, P.D.
Guptha, M.V.S.
 
Subject Geology and Geophysics
Holocene
Ecological Distribution
Foraminifera
Palaeoclimate
Palaeoceanography
Globigerinoides ruber
Globigerinoides sacculifer
Globorotalia menardii
ISW, Equatorial Indian Ocean
 
Description A set of seven core tops from western equatorial Indian ocean were analysed for planktonic foraminifera, which has yielded 20 planktonic foraminiferal species. Among them Globorotalia menardii, Globigerinoides sacculifer and G. ruber constitute the majority of population. Distribution of foraminifera suggests that the tropical fauna gradually and progressively decreases from 6 degrees N latitude to 21 degrees S latitude from 98.92 to 58.2 per cent while, the sub-polar fauna shows inverse distributional pattern showing upward trend in its abundance from 38 per cent at 21 degrees S latitude to 0.8 per cent at 6 degrees N latitude. Sub-tropical fauna is sparsely distributed in the Equatorial Indian Ocean. Based on these studies it is interpreted that dissolution has been encountered at about 6 degrees S latitude owing to deeper depth. Occurrence of tropical fauna in abundance at about 20 degrees S latitude suggests either general warming of oceans or the prevailing warm water currents. Lastly, the presence of sub-polar fauna in the same latitude, in considerable proportion also indicates shift in polar/subpolar front during Holocene
 
Date 1995-09-23T10:01:54Z
2017-09-30T01:29:58Z
1995-09-23T10:01:54Z
2017-09-30T01:29:58Z
1989
 
Type Conference Article
 
Identifier Recent Geoscientific Studies in the Arabian Sea off India: Papers Presented in the Seminar, Mangalore, India; 23-25 Sep 1987.; 1989; 133-135
http://drs.nio.org/drs/handle/2264/7263
 
Language en
 
Relation Geol. Surv. India Spec. Publ, vol.24
Seminar on Recent Geoscientific Studies in the Arabian Sea off India, Mangalore, India; 23-25 Sep 1987
NON-SCI
 
Publisher Calcutta: Geological Survey of India