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Saraswati, P. K.
- Contact Course-Cum-Field Workshop on Physical Stratigraphy and Palaeobiology for Young Earth Scientists from Northeast India
Abstract Views :183 |
PDF Views:113
Authors
P. K. Saraswati
1,
N. Pandey
2
Affiliations
1 Indian Institute of Technology, Mumbai, IN
2 Nagaland University Medziphem, IN
1 Indian Institute of Technology, Mumbai, IN
2 Nagaland University Medziphem, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 56, No 1 (2000), Pagination: 105-105Abstract
No Abstract.Full Text
- Taxonomic Application of Classification and Regression Tree (CART) and Random forests (RF): a Case Study of Middle Cambrian Trilobites
Abstract Views :183 |
PDF Views:2
Authors
Affiliations
1 Wadia Institute of Himalayan Geology, Dehra Dun - 248 001, IN
2 Department of Mathematics, Indian Institute of Technology Bombay, Powai, Mumbai - 400 076, IN
3 Department of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai - 400 076, IN
1 Wadia Institute of Himalayan Geology, Dehra Dun - 248 001, IN
2 Department of Mathematics, Indian Institute of Technology Bombay, Powai, Mumbai - 400 076, IN
3 Department of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai - 400 076, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 70, No 6 (2007), Pagination: 1033-1038Abstract
The morphological variables often have non-normal distribution The statistical analysis of such variables by imposing normal assumption invariably yields unreliable results Classification and Regression Trees (CART) and Random Forests (RF) are non parametric techniques that are alternative to conventional classification methods such as cluster analysis and linear discriminant analysis used in morphometric research This paper uses the aforementioned Non-Parametric techniques to the variables of the cramdial features of the trilobite genera Hundwarella and Iranoleesia. It is found that misclassification rates in CART and cluster analyses are comparable, whereas they are reduced substantially by the use of Random Forests.Keywords
Taxonomy, Trilobites, Cambrian, Random Forests, Regression Tree, Morphometries.
- Report on Second Winter School on Sedimentary Facies and Basin Analysis
Abstract Views :187 |
PDF Views:129
Authors
Affiliations
1 IIT Bombay Powai, Murnbai - 400 076, IN
1 IIT Bombay Powai, Murnbai - 400 076, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 63, No 4 (2004), Pagination: 463-464Abstract
No Abstract.Full Text
- Report on the International Symposium on Foraminifera (FORAMS-2002), Perth, Australia
Abstract Views :167 |
PDF Views:118
Authors
Affiliations
1 Department of Earth Sciences, Indian Institute of Technology, Porvai, Mumbai - 400 076, IN
1 Department of Earth Sciences, Indian Institute of Technology, Porvai, Mumbai - 400 076, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 59, No 5 (2002), Pagination: 479-479Abstract
No Abstract.Full Text
- Glauconites from the Late Palaeocene - Early Eocene Naredi Formation, Western Kutch and their Genetic Implications
Abstract Views :184 |
PDF Views:0
Authors
Affiliations
1 Department of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai - 400 076, IN
1 Department of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai - 400 076, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 73, No 4 (2009), Pagination: 567-574Abstract
Glauconitic minerals are considered as one of the valuable input parameters in sequence stratigraphic analysis of a basin. In the present study glauconitic minerals are reported from subtidal green shale facies in the lower part of the Late Paleocene-Early Eocene Naredi Formation of western Kutch. On the basis of the foraminiferal assemblage the glauconite bearing beds are interpreted to have formed in a mid shelf depositional settings of an unstable marine conditions. XRD studies confirm the glauconite mineralogy of the green pellets and provide an estimation of glauconite maturity. Textural attributes of the glauconites confirm their derivation by different degrees of alteration of precursor feldspar grains. Because of the authigenic origin and autochthonous nature, these glauconites hold promise for understanding sequence stratigraphy of the Palaeogene succession of the western Kutch.Keywords
Glauconite, Subtidal, Pellets, Feldspar, Authigenic, Palaeogene, Western Kutch.References
- AMOROSI, A. (1994) The glaucony-bearing horizon in the lower Miocene Bisciario Formation (Umbria-Marche Apennines). G. Geol., Bologona. v.56/1, pp.7-16.
- AMOROSI, A. (1995) Glaucony and sequence Stratigraphy: A conceptual framework of distribution in siliciclastic sequences. Jour. Sediment. Res., v.B65, pp.419-425.
- AMOROSI, A. (1997) Detecting compositional, spatial, and temporal attributes of glaucony: a tool for provenance research. Sediment. Geol., v.109, pp135-153.
- AMOROSI, A. and CENTINEO, M.C. (1996) Glucony from the Eocene of the Isle of Wright (southern UK): Implications for basin analysis and sequence stratigraphic interpretation. Jour. Geol. Soc. London, pp.878-896.
- BANDOPADHYAY, P.C. (2007) Interpretation of authigenic vs. allogenic green peloids of ferric clay in the Proterozoic Penganga Group, southern India. Clay Miner., v.42, pp.471-485.
- BANERJEE, S., JEEVAN KUMAR, S. and ERIKSSON, P.G. (2008) Mg-rich illite in marine transgressive and highstand system tracts: Examples from the Palaeoproterozoic Semri Group, central India. Precambrian Res., v.162, pp.212-226.
- BISWAS, S.K. (1987) Regional tectonic framework, structure and evolution of the western margin basins in India. Tectonophysics, v.135, pp.307-327.
- BISWAS, S.K. (1992) Tertiary Stratigraphy of Kutch. Jour. Pal. Soc. India, v.37, pp.1-29.
- BURST, J.F. (1958a) Their mineral nature and applications to stratigraphic interpretations. Amer. Assoc. Petrol. Geol. Bull., v.42, pp.310-327.
- BURST, J.F. (1958b) Mineral Heterogeneity in "Glauconite" pellets. Am. Mineral., Bull., v.43, pp.481-497.
- CHATTORAJ, S.L., BANREJEE, S. and SARASWATI, P.K. (2008) Sedimentation, Palageography and Sequence Startigraphic Framework of the Late Palaeocene to Early Eocene Naredi Formation, Western Kutch, Gujarat. Int. Assoc. Gondwana Res. Conf. series 5, p.116.
- DASGUPTA, S., CHAUDHURI, A.K. and FUKUOKA, M. (1990) Compositional characteristics of glauconitic alterations of K-feldspar from India and their implications. Jour. Sediment. Petrol., v.60, pp.277-281.
- DEB, S.P. and FUKUOKA, M. (1998) Fe-illites in a Proterozoic deep marine slope deposit in the Penganga Group of the Pranhita Godavari Valley - their origin and environmental significance. Jour. Geol., v.106, pp.741-749.
- GHOSH, A., SAHA, S., SARASWATI, P.K., BANERJEE, S., BURLEY, S. and GUNDU RAO, T.K. (2007) Gallitellia - a proxy for palaeo monsoonal upwelling on the western coast of India. Geol. Soc. America, Abstracts 39/6, p.584.
- KITAMURA, A. (1998) Glaucony and carbonate grains as indicators of the condensed section: Omma Formation, Japan. Sediment. Geol., v.122, pp.151-163.
- KROON, D. and NEDERBRAGT, A. (1990) Ecology and paleoecology of triserial planktic foraminifera. Mar. Micropaleontol., v.16, pp.25-38.
- KOSSOVSKAYA, A.G. and DRITS, V.A. (1970) The variability of micaceous minerals in sedimentary rocks. Sedimentology, v.15, pp.83-101.
- LEE, C.H., CHOI, S. and SUH, M. (2002) High iron glaucony from the continental shelf of the Yellow Sea off the southwestern Korean Peninsula. Jour. Asian Earth Sci., v.20, pp.507-515.
- ODIN, G.S. and MATTER, A. (1981) De glauconiarium origine. Sedimentology, v.28, pp.611-641.
- PORRENGA, D.H. (1967) Glauconite and chamosite as depth indicators in the marine environment. Mar. Geol., v.5, pp.495-501.
- RAY, A.K., GHOSH, C.C., SEN, P., GHOSH, A., NAG. S., SAHA, D. and CHOWDHURY, A. (1984) Palaeogene of Kutch - An Alternative View on the Initial Part of the Sequence. Indian Jour. Earth Sci., v.11, pp.207-224.
- SARASWATI, P.K. and BANERJEE, R.K. (1995) Post-Trappean sedimentation history of the North western Kutch. Proc. 10th Ind. Colloq. Micropal. Strat., pp.377-390.
- SINGH, I.B. (1978) Microfacies, Petrography and Mineralogy of the Tertiary Rock of Guar Nala near Narayan Sarovar, Kutch, India, and their Palaeoecological Significance. Jour. Pal. Soc. India, v.21-22, pp.78-95.
- VELDE, B. (1985) Clay minerals. Developments in Sedimentology 40. Amsterdam, Elsevier, pp.427.