DRS at CSIR-National Institute of Oceanography: Recent submissions
Now showing items 7281-7300 of 9429
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Offshore extension of the structural element of Udipi, confirmation from marine magneties
(Geological Society of India, 1987)The isomagnetic anomaly map (1:3,00,000) reflects conspicuous E-W, NW-SE, WNW-ESE, NE-SW and N-S trends which are similar to that of the onshore Dharwar trend. The map also shows short wavelength, high amplitude anomalies ... -
Marine magnetic profiles from the Direction Bank to the Kori Bank, Western Continental shelf of India
(Geological Society of India, 1986)Total magnetic field intensity measurements along two parallel NW-SE tracks from the Direction Bank to the Kori Bank show corelatable magnetic anomalies. High frequency positive anomalies observed northwest of Kathiawar ... -
Mineralogy and chemistry of manganese nodules from the Southern part of Carlsberg Ridge
(Geological Society of India, 1985)Petrographic study indicates that the nucleus of nodules is generally composed of clay, volcanic glass, basalt fragments, and earlier nodules. polished sections indicate typical collomorphic globular segregations and partly ... -
Clay mineral distribution on the Kerala continental shelf and slope
(Geological Society of India, 1983)Seventy-five sediment samples collected from the Kerala continental shelf and slope during the 17th and 71st Cruises of @iRV gaveshani@@ were analysed by X-ray diffraction for clay mineral cntent. The distribution of total ... -
Heavy Minerals in the Sediments on the Outer Continental Shelf between Vengurla and Mangalore on the West Coast of India
(Geological Society of India, 1981)Fifty-eight sediment samples from the outer continental shelf between Vengurla and Mangalore were analysed for heavy minerals consist of principally opaques, hornblende, epidote, garnet, sillimanite, hypersthene and zircon, ... -
Surficial Sediments of the Continental Shelf off Karnataka
(Geological Society of India, 1981)The continental shelf in this area is about 80 km wide and the edge of the shelf varies between 90 and 120 m water depth. Geologically modern fine-grained clastic sediments occur between the water depth. Geologically modern ... -
Cluster Analysis and Ecology of Living Benthonic Foraminiferids from Inner Shelf off Ratnagiri, West Coast, India
(Geological Society of India, 1981)Q-mode cluster analysis explains the spatial distribution data of living benthonic foraminiferids from the inner shelf off Ratnagiri. Two main biotopes and two sub-biotopes are revognised within the study area; biotope A, ... -
Authigenic Gypsum in a Deep Sea Core from Southeastern Arabian Sea
(Geological Society of India, 1980)Authigenic gypsum has been encountered in a deep sea core RC9-157 from the southeastern Arabian Sea at a depth of 4111 m which is a zone of lysocline. The formation of gypsum in the deep sea region is attributed to the ... -
Gypsum crystals in the inner shelf sediments off Maharashtra, India
(Geological Society of India, 1979)Gypsum crystals have been found in the inner shelf silty clay/clayey silt off the Maharashtra Coast between Vengurla and Bombay. Generally these occur as euhedral single or twinned crystals of selenite. Very often shells ... -
Holocene limestones of part of the western continental shelf of India
(Geological Society of India, 1979)Dredging on the western continental shelf of India has shown that the most common rock types outcropping on the irregular topography of the outer shelf (70-90 m) are algal limestones and shelly limestones containing ... -
A checklist of benthic foraminiferids from the inner shelf of Dabhol-Vengurla region, Arabian Sea
(Geological Society of India, 1979)Sixty-four benthonic foraminiferids are reported from Dabhol-Vengurla innershore neritic environment and they are listed in the order of their relative abundance. Small microenvironments or milieus created by the dominance ... -
Sediments of the western continental shelf of India - Environmental significance
(Geological Society of India, 1979)The degree of fragmentation and colour of the skeletal fragments, colouration in benthic foraminifers have been studied in surficial sediment samples collected from forty stations from the continental shelf region between ... -
Occurrence of rhyolytic tuffs at deep sea drilling project site 219 on the Laccadive Ridge
(Geological Society of India, 1976)A study of thin sections from the lower and middle parts of Unit 5 (Paleocene) from Site 219 shows that these largely consist of acidic or rhyolitic tuffs. The overlying limestones in Unit 5 (Paleocene) and Unit 4 (Lower ... -
Distribution of iron, manganese, cobalt and nickel in sediment cores of the northeastern Arabian Sea
(Geological Society of India, 1976)A study of the distribution of iron, manganese, cobalt and nickel in sediment cores from the shelf, slope and basin regions of Bombay-Kathiawar coast of India shows that cobalt and nickel are derived from the overlying sea ... -
Holocene planktonic foraminifera from the shelf sediments off Kerala Coast
(Geological Society of India, 1972)Twenty-two planktonic foraminifers were identified from a few samples collected aboard INS KISTNA at 9~'N and 76~'E, at 89 metres depth from the bottom sediment-water interface. A few of the more characteristic features ... -
Observations on marine macrophytes of the republic of Seychelles
(Walter de Gruyter, Berlin, 1989)The distribution of macrophytes was studies from the major islands (Mahe, Praslin and La Digue) of the Seychelles Archipelago. The macrophytes were represented by 72 species of seaweeds, 8 species of mangroves and 6 species ... -
Changes in the marine green alga @iChaetomorpha media@@ on infection by a fungal pathogen
(Walter de Gruyter, Berlin, 1988)Biochemical changes in the green filamentous alga @iChaetomorpha media@@ Kutzing infected with a holocarpic endobiotic fungus@@ Pontisma lagenidioides@@ Petersen were studied. Healthy plants of @iC. media@@ were inoculated ... -
Oxytocic principle of Red alga Amphiroa fragilissima
(Walter de Gruyter, Berlin, 1987)The crude aqueous methanolic extract of the marine red alga @iAmphiroa fragilissima@@ has been reported as exhibiting oxytocic and spasmogenic activity at a dose of 50 ~kg/ml. The activity is located in the water soluble ... -
Occurrence of the Tharaustochytrid, @iCorallochytrium limacisporum@@ gen. et. sp. nov. in the coral reef lagoons of the Lakshadweep Islands in Arabian Sea
(Walter de Gruyter, Berlin, 1987)A new thraustochytrid protist, @iCorallochytrium limacisporum@@ gen. et sp. nov. is described from the waters of the coral reef lagoons of Agatti, Kavaratti and Bingaram belonging to the Lakshadweep group of islands in the ... -
Fungal parasites of the marine green algae, Cladophora and Rhizoclonium
(Walter de Gruyter, Berlin, 1986)Diseases caused by three fungal parasites in the green algal genus @iCladophora@@ from the beaches of Goa and Lakshadweep islands in Arabian sea in India are described. These are caused by @iSirolpidium bryopsidis, Olpidium ...