Browsing by Subject "palaeoceanography"
Now showing items 1-20 of 27
-
60 Myr records of major elements and Pb-Nd isotopes from hydrogenous ferromanganese crusts: Reconstruction of seawater paleochemistry
(Pergamon, 1999)The time series of major element geochemical and Pb- and Ni-isotopic composition obtained for seven hydrogenous ferromanganese crusts from the Atlantic, Indian, and Pacific Oceans which cover the last 60 Myr are compared. ... -
A Cenozoic record of the equatorial Pacific carbonate compensation depth
(Nature Publishing Group, 2012)Atmospheric carbon dioxide concentrations and climate are regulated on geological timescales by the balance between carbon input from volcanic and metamorphic outgassing and its removal by weathering feedbacks; these ... -
Archaeological sites along the Gujarat coast: Proxies to decipher the past shoreline
(Darshak Itihas Nidhi, 2011)During the late Holocene, coastal configuration has undergone continuous changes due to various reasons like sea level fluctuations and shoreline shift. Several reasons are attributed like global warming causing polar ice ... -
Benthic foraminifera
(Elsevier, 2013)Benthic foraminifera are protozoa, which evolved during Cambrian and at present are found living in all possible marine environments. Their single cell is enclosed in a microscopic calcareous or agglutinated shell called ... -
Carbonate and organic carbon content changes over last 20 ka in the Southeastern Arabian Sea: Paleoceanographic implications
(Elsevier, 2009)Two Gravity cores (AAS 38-4 and AAS 38-5) recovered from the eastern Arabian Sea were analyzed for calcium carbonate (CaCO3), organic carbon, aluminium (Al) and titanium (Ti) in order to understand the calcium carbonate ... -
Cyclicity in the Late Holocene monsoonal changes from the western Bay of Bengal: Foraminiferal approach.
(The Palaeontological Society of India, 2009)Benthic foraminiferal characteristics, including abundance of total benthic foraminifera, angular asymmetrical benthic foraminifera, Uvigerina sp. and Bulimina marginata, have been studied in a piston core (exihibiting ... -
Deterioration of Early Holocene coral reef due to sea level rise along west coast of India: Benthic foraminiferal testimony
(China University of Geosciences (Beijing), 2012)A total of 103 surface sediment samples collected from the water depth range of 15-3300 m along Vijaydurg-Karwar stretch of central west coast of India were analyzed for foraminiferal content. Relict benthic foraminiferal ... -
Discussion on the paper entitled "Indian Contribution in the Field of Palaeo-oceanography (2006-2012)" by A K Gupta et al., 2012. Proc Indian Nat Sci Acad Vol. 78, No. 3 (IUGS Special Issue) pp. 313-319: Serious flaws in the status report on Indian palaeoceanography
(Indian National Science Academy, 2013) -
Early Pliocene paleoceanography of the Vityaz Fracture Zone (VFZ), Central Indian Ridge
(Geological Society of China, 2007)Planktic foraminifera from the calcareous substrate of a ferromanganese crust in the Vityaz Fracture Zone (VFZ), Central Indian Ridge were studied to reconstruct the early Pliocene paleoceanography of this region. Eleven ... -
Evidences of late quaternary neotectonic activity and sea-level changes along the western continental margin of India
(Current Science Association, Bangalore, India, 1996)The offshore data on sea-level changes along the western margin of India have been reviewed and evidences of Late Quaternary neotectonic activity and subsidence are documented, based on the diagenetic textures of limestones ... -
Geomorphology and geology of the Bay of Bengal and the Andaman Sea
(Oxford and IBH, New Delhi, 2001)Marine geological studies in the Bay of Bengal were initiated by the Andhra University in early 1950's and have subsequently become widespread during the International Indian Ocean Expedition (IIOE - 1962-65). Geomorphological ... -
Growth response of a deep-water ferromanganese crust to evolution of the Neogene Indian Ocean
(Elsevier, 2000)A deep-water ferromanganese crust from a Central Indian Ocean seamount dated previously by sup(10)Be and sup(230) Th sub(excess) was studied for compositional and textural variations that occurred throughout its growth ... -
High resolution climatic records of the past ~489 years from Central Asia as derived from benthic foraminiferal species, Asterorotalia trispinosa
(Elsevier, 2012)Many researchers have reported the occurrence of the species Asterorotalia trispinosa as a major constituent in foraminiferal assemblages from different regions, its ecological significance has never been studied. The ... -
Himalayan sedimentary pulses recorded by silicate detritus within a ferromanganese crust from the Central Indian Ocean
(Elsevier, 2003)A Central Indian Ocean deep-water seamount hydrogenous ferromanganese crust (SS663-Crust) contains variable (7-23%) amounts of detrital material (silicate-detritus). Taking into account the growth rate of the authigenic ... -
Indian contributions in the field of palaeoceanography (2006-2012)
(Indian National Science Academy, 2012)Excellent studies have been carried by Indian scientists to understand paleoceanographic changes in the Indian Ocean including the Arabian Sea and Bay of Bengal using Ocean Drilling Program cores. These studies revealed ... -
Late Quaternary paleoceanographic features as deduced from calcium carbonate and faunal changes of planktonic foraminifers in core samples from northeastern Arabian Sea
(Marine Biological Association of India, 1997)Two pelagic core samples, ARB-52 and ARB-54 from 2240 m and 800 m depths respectively from the Arabian Sea off Bombay were analysed for determining climatic changes during the past 30,000 yr. based on the interpretation ... -
Monsoons, history of
(Academic Press, San Diego, USA, 2001)The evolution of the Asian monsoon started at around 9.5 Ma, in response to the uplift of the Himalayas. The monsoonal intensity reached its maximum at around 5 Ma, and from that time the associated easterly trade winds ... -
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 ... -
On the nature of the calcareous substrate of a ferromanganese crust from the Vityaz Fracture Zone, Central Indian Ridge: Inferences on palaeoceanography
(Springer, 2002)A 15-cm-thick carbonate substrate encrusted with ferromanganese oxides from the Vityaz Fracture Zone, Central Indian Ridge was analysed to reconstruct the palaeoceanography of the region. Based on the calcareous nannoplankton ... -
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 ...