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Topography and Sediments of the Western Continental Shelf of India - Vengurla to Mangalore

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Title Topography and Sediments of the Western Continental Shelf of India - Vengurla to Mangalore
 
Creator Nair, R R
Hashimi, N H
Kidwai, R M
Guptha, M V S
Paropkari, A L
Ambre, N V
Muralinath, A S
Mascarenhas, A
D'Costa, G P
 
Description 224-230
Survey of the western continental margin of India between Vengurla and Mangalore shows that the shelf has an average width of about 80 km. The most common shelf break in the region belongs to the gentle break type of Wear {Mar. Technol. Soc. J. 8 (1974), 37} and for this reason the depth of the shelf break varies between 90 and 120 m. A less common variety of the shelf break is one where a terrace is present at the shelf break as off Bhatkal. Surficial sediments consist of silts and clays on the inner shelf (50 m), calcareous sand on the outer shelf (50 to 100 m) and silty sands on the upper continental slope (100 m). Carbonate content in the coarse fraction is low in the inner shelf (90%) on the upper continental slope. On a carbonate free basis the change in texture of the sediments is least on the inner shelf and greatest on the outer shelf and upper continental slope. Outer shelf sands contain iron-stained quartz (recent and relict) to the extent of 20% whereas the inner shelf sediments contain only unstained quartz. Distribution of mud on the continental shelf has been explained using the conceptual models of McCave {Shelf sediment transport process and pattern (Dowden Hutchinson and Ross, Inc., Stroudsburg), 1972, 225}.
 
Date 2017-01-03T05:59:11Z
2017-01-03T05:59:11Z
1978-12
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/39555
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.07(4) [December 1978]