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Title: Planktonic foraminifera in sediment samples from the eastern Arabian Sea
Authors: Rao, K. Kameswara
Issue Date: Jun-1972
Publisher: NISCAIR-CSIR, India
Abstract: Twenty-two species of planktonic foraminifera have been identified from the bottom sediments of the Arabian Sea off Bombay and their percentage occurrence has been studied. Species composition has shown that the sediments of the continental slope region off Bombay are represented by a larger number of species than the shelf sediments. The forms which are common in the eastern part of the Arabian Sea are: Globigerina bulloides, Globigerinoides, ruber, G. sacculifer, Globigerinita glutinata, Globigerinella aequilateralis, Orbulina universa, Pulleniatina obliquiloculata, Globorotalia menardii and G. tumida. Concentration of the planktonic foraminifera decreases from the offshore regions to regions towards the coast. In the slope sediments the per cent of CaCO3 is proportional to the number of planktonic foraminifera. The presence of high latitude cold water species along with the warm water species in the Arabian Sea off Bombay suggests the mixing of Antarctic water with other types of water found along the west coast of India. Similarity of the planktonic foraminifera of the eastern Arabian Sea with that of Red Sea has been shown on the basis of species composition and dominance of certain species in both the seas. On the basis of this observation, it is concluded that Red Sea water has spread into the offshore region of Bombay.
Page(s): 1-7
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.01(1) [June 1972]

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