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Khare, Neloy
- Effect of River Discharge on the Morphology of Benthic Foraminiferal Test
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Authors
Rajiv Nigam
1,
Neloy Khare
1
Affiliations
1 Geological Oceanography Division, National Institute of Oceanography, Dona Paula, Goa 403 004, IN
1 Geological Oceanography Division, National Institute of Oceanography, Dona Paula, Goa 403 004, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 43, No 4 (1994), Pagination: 457-463Abstract
Twenty one surface sediment samples collected from the inner shelf region off Karwar at 22-52 m water depth range have been studied for foraminiferal content. Based on the external test morphology the entire foraminiferal population (148 species) can be placed into two broad morpho-groups namely angular-asymmetrical and rounded-symmetrical morpho-groups. The surficial distribution of these groups revealed that angular-asymmetrical morpho-group gets adversely affected by high turbulence associated with increased fresh water river disCharge, whereas, rounded-symmetrical morpho-group responded in a reverse manner. Since areal extent of river induced turbulence depends upon fresh water discharge due to monsoonal rains, the results show high potential in generating proxy data for the reconstruction of paleomonsoonal history through the study of morpho-groups in sub surface sediments of coastal regions.Keywords
Foraminifera, Morphology, Palaeoclimate, West Coast, Arabian Sea.
- A Note on Glandulina spinata Cushman - A Rare Foraminiferal Species from Inner Shelf Sediments of Bay of Bengal, off Karikkattukuppam, Near Chennai, Southeast Coast of India
Abstract Views :219 |
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Authors
Affiliations
1 Department of Applied Geology, University of Madras, Guindy College Campus, A.C. College Building, Chennai 600 025, IN
2 Antarctic Study Centre, Vasco-da-Gama, Goa 403 802, IN
1 Department of Applied Geology, University of Madras, Guindy College Campus, A.C. College Building, Chennai 600 025, IN
2 Antarctic Study Centre, Vasco-da-Gama, Goa 403 802, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 54, No 3 (1999), Pagination: 309-313Abstract
Studies on Recent foraminifera from inner shelf sediments of the Bay of Bengal, off Karikkattukuppam, near Chennai (latitude 13°04'N; longitude 80°17'E), revealed the presence of a rare foraminiferal species. Taxonomic observations reveal this spinose taxon to be Glandulina spinata Cushman and is reported herein for the first time from Indian waters. Available data suggest it to be a tropical, inner shelf dwelling taxon, with a preference for muddy substrate.Keywords
Palaeontology, Recent, Foraminifera, Taxonomy, Inner Shelf, Bay of Bengal.- First 'Oceanibsa' meeting during 14-16 September, 2005 at Angra-Dos-Reis, Brazil
Abstract Views :173 |
PDF Views:117
Authors
Affiliations
1 National Centre for Antarctic and Ocean Research, Department of Ocean Development Headland Sada, Vasco-da-Garna, Goa - 403 804, IN
1 National Centre for Antarctic and Ocean Research, Department of Ocean Development Headland Sada, Vasco-da-Garna, Goa - 403 804, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 67, No 4 (2006), Pagination: 551-552Abstract
No Abstract.Full Text
- Granulometric Analysis of Glacial Sediments, Schirmacher Oasis, East Antarctica
Abstract Views :183 |
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Authors
Affiliations
1 Department of Geology, SGB Amravati University, Amravati - 444 602, IN
2 Ministry of Earth Sciences, Lodhi Road, New Delhi - 110 003, IN
1 Department of Geology, SGB Amravati University, Amravati - 444 602, IN
2 Ministry of Earth Sciences, Lodhi Road, New Delhi - 110 003, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 73, No 5 (2009), Pagination: 609-620Abstract
Granulometric analysis of nineteen sediment samples has been carried out for their statistical and textural parameters. The samples are collected from the northern and southern margins of Schirmacher Oasis extending below the polar ice sheet and grading to coastal area respectively and main rocky land of Schirmacher including lakes. The analysis shows that most of the sediments are of medium grain size and fall in poor to very poor sorted category.An attempt has been made to interpret the depositional set-up by plotting the scatter patterns between various textural parameters, including C-M plot and arithmetic log-probability curves. The influence of physical parameters viz. low to high velocity winds, ice and meltwater on sediment characteristics has been discussed.
Keywords
Granulometric Analysis, Glacial Sediments, Textural Parameters, Schirmacher Oasis, East Antarctica.References
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- Textural Characteristics, Distribution Pattern and Provenance of Heavy Minerals in Glacial Sediments of Schirmacher Oasis, East Antarctica
Abstract Views :187 |
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Authors
Affiliations
1 Department of Geology, SGB Amravati University, Amravati, Maharashtra, 444 602, IN
2 Ministry of Earth Sciences, Lodhi Road, New Delhi - 111 003, IN
1 Department of Geology, SGB Amravati University, Amravati, Maharashtra, 444 602, IN
2 Ministry of Earth Sciences, Lodhi Road, New Delhi - 111 003, IN