Informatics Publishing Limited

Anil K. Gupta ¹, M. V. S. Guptha ², S. Masood Ahmad ³

Affiliations
1 Dept. of Geology and Geophysics, IIT Khragpur-721302, IN
2 National institute of Oceanography, Dona Paula, Goa-403004, IN
3 Naional Geophysical Research Institute, Hyderabad-500007, IN

Abstract

No Abstract.

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M. V. S. Guptha ¹, P. Divakar Naidu ¹, A. S. Muralinath ¹

Affiliations
1 National Institute of Oceanography, Dona Paula, Goa 403004, IN

Abstract

Examination of 39 vertical zooplankton hauls from the southeastern Arabian Sea for living planktonic foraminifera showed the presence of 28 species indicating highest diversity during summer of the year 1985. The maximum recorded abundance off Cape Comorin was 3100/1000 m³. while the highest abundance of 1320 specimensl 1000m³was encountered off the coast of Kerala.

Based on the planktonic foraminifera, two assemblages of summer tropical Arabian Sea and summer Arabian Sea upwelling were encountered off Kerala coast and south of Cape Comorin respectively. Foraminiferal diversity observed was quite high in this region. The standing crop of planktonic foraminifera encountered was highest off Cape Comorin coast.

Keywords

Oceanography, Palaeontology, Foraminifera, Kerala Coast, Arabian Sea.

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Rahul Mohan ¹, M. V. S. Guptha ²

Affiliations
1 National Centre for Antarctic & Ocean Research, Department of Ocean Development, Government of India, Headland Sada, Goa - 403 804, IN
2 National Institute of Oceanography, Dona Paula, Goa - 403 004, IN

Abstract

Planktic foraminiferal studies from the southern Bay of Bengal (SBBT) indicate the presence of corroded specimens of Globorotalia menardii in the deep trap at a depth of 3011 rn during February-March 1992. Strangely, all the other spinose and less resistant spinose foraminiferal species are found devoid of any signs of dissolution in association with the highly corroded specimens of Grmenardii. In view of the above and also to the fact that this trap depth is well above the lysocline, it is postulated that these corroded specimens of Grmenardii tests could have been supplied by lateral advection and mixed up with the settling particles at SBBT, thus this assemblage is a resultant of two different sources, during this particular period.

Keywords

Planktic Foraminifera, Corrosion, Lateral advection, Sediment trap, Bay of Bengal.

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M. V. S. Guptha ¹

Affiliations
1 National Institute of Oceanography Dona Paula, Goa - 403 004, IN

Abstract

No Abstract.

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