Browsing Scholarly literature by Subject "palaeoenvironments"
Now showing items 1-12 of 12
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Boron/calcium ratios in Globigerinoides ruber from the Arabian Sea: Implications for controls on boron incorporation
(Elsevier, 2014)Culture and downcore studies have been used to argue that B/Ca ratios in planktic foraminifera are correlated with seawater pH and may record seawater borate/bicarbonate ratios, although other factors may also control B/Ca. ... -
Changing environmental conditions in recent past — Reading through the study of geochemical characteristics, magnetic parameters and sedimentation rate of mudflats, central west coast of India
(Elsevier, 2014)Geochemical (sediment components, major and trace metals), magnetic related parameters (concentration, mineralogy and grain size) and radionuclide (<sup>210</sup>Pb) analyses were carried out on sediment cores collected ... -
Climatic aridity over India 11,000 years ago: Evidence from feldspar distribution in shelf sediments
(Elsevier, 1986)Feldspars and quartz contents of sand and silt fractions of forty three samples from the western continental shelf of India were determined by the X-ray diffraction method. The results indicate that the feldspar content ... -
Distributional pattern of benthic foraminiferal morpho-groups in the shelf region off Mangalore: Environmental implications
(NISCAIR, CSIR, 1995)The foraminiferal population in 45 surface sediment samples (20-86 m water depth) off Mangalore, Karnataka, India, was divided into benthic and planktonic assemblages. Within the benthic community based on the external ... -
Heavy mineral distribution in the surficial sediments from the eastern continental margin of India and their implications on palaeoenvironment
(Indian Society of Earth Sciences, Calcutta, 1996)Heavy mineral distribution from the surficial sediments of the Eastern Continental Margin of India, between Machilipatnam and Gopalpur shows that their concentration ranges from 0.4 to 13.9%. Heavy minerals such as opaques, ... -
Isotopic studies of beach rock carbonates from Konkan, central west coast of India
(New Academic Publishers, Delhi, 2001)The beach rock carbonates from the 200 km long stretch from Guhagar in the north to Deogad in the south along the Konkan coast (Maharashtra, India) are studied for sup(14)C dating and sup(13)C : sup(12)C and sup(18)O : ... -
Late Quaternary Faunal Change in Coastal Arabian sea Sediments
(Elsevier, 1982)Carbonate content and faunal composition of two gravity cores from the coastal Arabian Sea provide evidence of a major environmental change in surface ocean waters about 13,000 yr B.P. Radiocarbon dating indicates that ... -
Living coccolithophores during the northeast monsoon from the Equatorial Indian Ocean: Implications on hydrography
(Elsevier, 2005)Water samples collected at five stations along 931E section (1 degrees N-4 degrees S) during the northeast monsoon (12-15 February 2000) at five depths (surface, 50, 100, 150 and 200 m) in the eastern equatorial Indian ... -
Otoliths in continental shelf and slope surficial sediments off Saurashtra, Arabian Sea, India and their significance
(New Academic Publishers, Delhi, 2001)Otoliths are a viable and underutlized paleoceanographic tool. In India a considerable amount of work has been done on otoliths of the fresh water fishes, however no significant report is available for marine otoliths. In ... -
Palaeogene hardgrounds and associated intraclast lag deposits as the substrates of ferromanganese crusts and nuclei of nodules: Inferences of abyssal current in the Central Indian Ocean Basin
(Palaeontological Society of India, 1995)The Palaeogene substrates of ferromanganese crusts and nuclei of nodules collected from the Central Indian Basin chiefly consist of incipient to younger pelagic hard grounds and associated intraclast lag deposits. The ... -
Radiolarian monsoonal index Pyloniid group responds to astronomical forcing in the last approx. 500,000 y ears: Evidence from the Central Indian Ocean
(Indian Society for Prehistoric and Quaternary Studies, 1999)Pyloniid radiolarians, oceanic micro-zooplanktons (surface water dwelling), are sensitive to monsoon sea surface temperature and salinity, and their variation down a core may provide an insight into the proxy climatic ... -
Spatial and temporal distribution of foraminifera in sediments off the central west coast of India and use of their test morphologies for the reconstruction of paleomonsoonal precipitation
(Micropaleontology Press, 1999)From the shallow region off the central west coast of India, 21 samples of surface sediments (ranging in depth from 22 to 52 m) along with two sediment cores of 4.80 m and 4.00 m (surface/subsurface) have been analyzed for ...