Institute's contributions: Recent submissions
Now showing items 4001-4020 of 9252
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Bathymetric study of the Neotectonic Naini Lake in outer Kumaun Himalaya
(Geological Society of India, 1993)The Naini Lake is a product of rotational movement on a NW-SE trending Nainital Fault, quite after the establishment of the drainage of a mature stream named Balia Nala. Detailed bathymetric study, permits division of this ... -
Coexistence of pumice and manganese nodule fields-evidence for submarine silicic volcanism in the Central Indian Basin
(Pergamon, 1993)Pumice, of various shapes and sizes, uncoated or coatEd. by ferromanganese oxides, have been recovered from deeper parts of the Central Indian Basin (CIB). The pumice field covers an area of 600,000 km sup(2), approximately ... -
Determination of net shroe drift direction of central west coast of India using remotely sensed data
(Coastal Research Foundation, 1993) -
Foraminifera and changing pattern of monsoon rainfall
(Current Science Association, Bangalore, India, 1993)The palaeomonsoonal history can be reconstructed utilizing climatically sensitive properties of marine microorganisms; foraminifera. The results show a major boundary at 3500 years B.P. and periods of rather low precipitation ... -
Evidence for the formation of different-sized nodules by different accretionary processes
(Taylor and Francis, 1993)Studies on different-sized polymetallic nodules from the Central Indian Ocean Basin reveal that chemical composition is largely related to the nodule diameter which show systematic decrease in Mn, Cu, and Ni content with ... -
Distribution patterns of Recent planktonic foraminifera in surface sediments of the western continental margin of India
(Elsevier, 1993)Study of Recent plankton foraminifera from the surface sediment samples of western continental margin of India reveals the ecological preferences of the different planktonic foraminifera species in the area. Higher absolute ... -
Neogene oceanographic variations recorded in manganese nodules from the Somali Basin
(Elsevier, 1993)A detailed study of a nodule from the Somali Basin datEd. by sup(230)Th sub(excess) was correlated with the paleoceanographic events recorded in Site 236 (Leg 24) Deep Sea Drilling Project (DSDP) cores. Tentative indications ... -
Ferromanganese micronodules from Bengal Fan
(Museo Geologico di Bologna, 1993)The occurrence of ferromanganese micronodules, hitherto unreported from any fan-valley system of the world, has been recorded from over 0.22 million km sup(2) area located in the middle fan region of the Bay of Bengal. ... -
Residual fluxes and suspended sediment transport in the lower reaches of Muvattupuzha River, southwest coast of India
(NISCAIR, New Delhi, 1993)Spatial and seasonal variation of different physical processes governing the transport of salt and sediment of the Muvattupuzha River, in Kerala, India are discussed. Salt and suspended sediment due to tidal pumping was ... -
New evidence for enhanced preservation of organic carbon in contact with oxygen minimum zone on the western continental slope of India
(Elsevier, 1993)In order to evaluate the reason for organic enrichment on the western continental slope of India, we provide Rock-Eval pyrolysis data of 25 surficial sediment samples from this area. Results show that the organic matter ... -
Comment on "Lack of enhanced preservation of organic matter in sediments under the oxygen minimum on the Oman Margin" by T.F. Pedersen, G.B. Shimmield, and N.B. Price
(Pergamon, 1993)A comment on the study on the lack of enhanced preservation of organic matter in sediments under the oxygen minimum on the Oman Margin is given. As such a negative correspondence between productivity and organic enrichment ... -
Lithogenic fluxes to the northern Indian Ocean - An overview
(University of Hamburg, Germany, 1993)Lithogenic fluxes to the northern Indian Ocean, measurEd. by time-series sediment traps, exhibit a strong seasonality with the bulk of the material (40 to 80 %) being deposited during the southwest monsoon period. This ... -
Some new observations on the intra-plate deformation in the Central Indian Basin (CIB)
(Elsevier, 1993)Single channel airgun seismic reflection data from equatorial region of the Central Indian Basin (CIB) revealed some new information on the structure and stratigraphy of the deformed blocks in this area. The data from five ... -
Mineral chemistry of Carlsberg Ridge basalts at 3 degrees 35'- 3 degrees 41' N
(Springer, 1993)Mineral chemical analyses of transitional basalts from the Carlsberg Ridge show plagioclase (An approximately 87 mole %), phenocrysts, and microphenocrysts have a K sub(2)O depletion as compared to the laths (approximately ... -
Growth constraints of the Indian Ocean seamounts
(Indian Geophysical Union, Hyderabad, India, 1993)Distribution and morphology of volcanic seamounts from an area of 84572 km super(2) in the Central Indian Ocean Basin (CIOB) using multibeam bathymetric system are presented here. The study area is boundEd. by two NNE-SSW ... -
Morphology of a coral bank, western continental shelf of India: A multibeam study
(Geological Society of India, 1993)Morphology of a living coral bank (Gaveshani Bank) is described using multibeam swath bathymetric survey system Hydrosweep. The bank has a height of 42 m, length of 2 km and a maximum width of 1.66 km, with steep flanks ... -
Granulometric analyses of pelites using a sedigraph: Examples from a Volcano-sedimentary environment
(Geological Society of India, 1993)This article presents granulometric data of pelites (less than 40 microns) of mixed composition from a volcano-sedimentary environment. The sedigraph serves as an useful tool in the analyses of silt-clay fraction of marine ... -
Manganese nodule distribution in different topographic domains of the central Indian Basin
(Taylor and Francis, 1993)Manganese nodule distribution is primarily influencEd. by seafloor topography. Nodule distribution at 479 locations vis-a-vis seabed topography is studiEd. by superimposing sampling location on the topographic profile and ... -
Spreading history of the Arabian Sea: Some new constraints
(Elsevier, 1993)Based on a new identification of magnetic anomalies, additional constraints are provided on the two episodes of spreading history of the Arabian Sea. Commencing at A27, the older phase ended at A21 and sprading of the ... -
On the possibility of allochtonous peat on the inner shelf off Karwar
(Current Science Association, Bangalore, India, 1993)Peat deposits occupying an area of more than 139 km super(2), intercalated in sediments from the inner shelf of Karwar-Kumta, Karnataka, India, have been identified. Such organic-rich nearshore facies are rare and hence ...