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Saxena, R. K.
- Campanian - Maastrichtian Nannoplankton biostratigraphy of the Narsapur claystone Formation, Krishna-Godavari Basin, India
Abstract Views :178 |
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Authors
R. K. Saxena
1,
C. M. Misra
1
Affiliations
1 Palynology Laboratory, KDMIPE, Oil and Natural Gas Corporation, Dehradun - 248 195, IN
1 Palynology Laboratory, KDMIPE, Oil and Natural Gas Corporation, Dehradun - 248 195, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 45, No 3 (1995), Pagination: 323-329Abstract
Nannoplankton biostratigraphy of the Campanian - Maastrichtian 870 metre thick argillaceous subsurface sediments below the Lowest trap of Narsapur area, Krishna-Godavari Basin has been presented in the paper. These infratrappean sediments are assigned to Micula nurus and Arkhangelskiella cymbifomis zones of Late Maasbichtian age and undifferentiated CC 19-CC 23 nannoplankton zones of the Campanian age. Occurrence of global Late Maastrichtian marker Micula murus just below the lowest trap is significant and considered to be important short lived nanno-event in Late Maastrichtian times. The initiation of oldest volcanic eruption in the Narsapur area is around 67.0 Ma. (middle of Micula mums zone) and it is correlated with the lowest limit of the Deccan volcanism in Razole area.Keywords
Nannoplankton, Biostratigraphy, Campanian, Maastrichtian, Deccan Volcanism, Krishna-Godavari Basin.
- Age of Deccan Volcanism Across KTB in Krishna-Godavari Basin: New Evidences
Abstract Views :185 |
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Authors
D. S. N. Raju
1,
B. C. Jaiprakash
1,
Arun Kumar
1,
R. K. Saxena
1,
Alok Dave
1,
T. K. Chatterjee
1,
C. M. Mishra
1
Affiliations
1 Geological Laboratories, KDM Institute of Petroleum Exploration, ONGC, Kaulagarh Road, Dehra Dun - 248195, IN
1 Geological Laboratories, KDM Institute of Petroleum Exploration, ONGC, Kaulagarh Road, Dehra Dun - 248195, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 45, No 2 (1995), Pagination: 229-233Abstract
The latest Paleontological data suggest that the duration of Deccan trap eruption in Krishna-Godavari basin varies from place to place and could be anywhere between <0.5 Ma and 6 Maacross KTB. Three groups of fossils viz., Planktic foraminifera, Nannoplanktics and Dinoflagellate cysts suggest that the initiation of volcanism was during latest Maastrichtian within the upper part of Abathomphalus mayaroensis Zone, Micula murus Zone and Triblastula utinensis Zone between 67 and 66.5 Ma. There are conflicting evidences in dating the upper age limit of the volcanics probably due to diverse methods employed in calibration of forarniniferal and nannoplanktic scales or selective retrieval of very small sized planktics of zones P0 and P1 in well cuttings.Keywords
Micropalaeotogy, Deccan Volcanism, Age, Krishna-Godawari Basin.- Calcareous Nannofossils Across the K/T Boundary and the Age of the Deccan Trap Volcanism in Southern India
Abstract Views :171 |
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Authors
Affiliations
1 Geological Institute ETHZ, 8092 Zurich, CH
2 Palynology Laboratory, KDM Institute of Petroleum Exploration, ONGC, Dehra Dun-248 195, IN
1 Geological Institute ETHZ, 8092 Zurich, CH
2 Palynology Laboratory, KDM Institute of Petroleum Exploration, ONGC, Dehra Dun-248 195, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 51, No 2 (1998), Pagination: 183-192Abstract
The distribution of calcareous nannofossils across the Cretaceous/Tertiary (K/f) boundary in well PLK-A in the Krishna-Godavari Basin of Southern India has been studied in the interval including sediments above, within and below the Deccan traps. With Micula murus present and M. prinsii missing, the presence of upper, but not uppermost Maastrichtian can be shown. The K/T boundary lies above trap flow 2 and the traps are overlain by sediments of the lower part of NP 3 (Danian). The span of volcanism has here probably lasted not more than 4 Ma.Keywords
Cretaceous-Tertiary boundary, Deccan Volcanism, Krishna-Godavari Basin, Andhra Pradesh.- Middle Jurassic Calcareous Nannofossils from Type Jumara formation, Kachchh, Western India
Abstract Views :207 |
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Authors
Affiliations
1 Palynology Laboratory, Geology Division, KDMIPE, ONGC, Dehradun-248195, IN
2 5B Whispering Meadows, Haralur Road, Off Sarjapur Road, Bangalore-560034, IN
1 Palynology Laboratory, Geology Division, KDMIPE, ONGC, Dehradun-248195, IN
2 5B Whispering Meadows, Haralur Road, Off Sarjapur Road, Bangalore-560034, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 72, No 4 (2008), Pagination: 495-509Abstract
Late Bathoman - Callovian - Oxfordian - Early Kimmendgian siliciclastic sediments of some prominent sections of Kachchh Mainland Jumara, Basal Jumara, Ler, Kanthkot, including Kuldhar Member of Jaisalmer Basin, contain discrete succession of Calcareous Nannofossil assemblage encompassing Standard Jurassic Zones NJ12 Ansulasphaera helvetica, NJ13 Stephanohthion bigotu bigotu, NJ14 Stephanolithion bigoti maximum and NJ15 Cyclagelosphaera margerelu. The Calcareous Nannofossil Zones and Events are tied to Boreal and Indian part of Tethyan Ammonite zonation 33 species of Calcareous Nannofossils were documented from the Bositra (=Posidonia) bearing basal dark grey shales of Jumara (=Chan) Formation exposed at the type area of Jumara Dome.Keywords
Calcareous Nannofossils, Late Bathoman-Early Kimmendgian Biostratigraphy, Kachchh-Jaisalmer Basins.- Palynofloral Study of the Intertrappean Bed Exposed at a New Locality in Kutch District, Gujarat and its Implications on Palaeoenvironment and Age
Abstract Views :193 |
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Authors
Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow - 226 007, IN
1 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow - 226 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 74, No 6 (2009), Pagination: 690-696Abstract
A palynofloral assemblage has been recorded from the intertrappean bed exposed at a new locality, near Naredi, on Naliya-Narayan Sarovar Road in western Kutch, Gujarat. This intertrappean bed (ca. 0.6 m thick) of grey laminated clay is underlain and overlain by the volcanic traps. The assemblage recovered from this bed includes algal and fungal remains, pteridophytic spores, angiospermous pollen as well as cuticles of terrestrial plants. Important palynotaxa recovered are Azolla sp., Lygodiumsporites lakiensis, Polypodiaceaesporites intrapunctatus, Compositoipollenites argutus, C. conicus, Graminidites media, Ladakhipollenites minutus, Lakiapollis ovatus, Matanomadhiasulcites sp., etc. Besides, a variety of fungal remains belonging to the genera Dictyosporites, Frasnacritetrus (Tetraploa), Kutchiathyrites, Palaeomycites (VAM fungi), Papulosporonites, Parmathyrites, Phragmothyrites, Polycellaesporonites (Alternaria), etc. have been recorded. It has been deduced that this intertrappean bed was deposited in a shallow depression over the trap during short interval of quiescence in a tropical-subtropical climate. The age of the intertrappean bed is suggested as Early Palaeocene.Keywords
Palynoflora, Palaeoenvironment, Early Palaeocene, Intertrappean Bed, Kutch, Gujarat.References
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- Some formulae Involving Jacobi Polynomials
Abstract Views :189 |
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Authors
P. C. Munot
1,
R. K. Saxena
1
Affiliations
1 University of Jodhpur, Jodhpur, IN
1 University of Jodhpur, Jodhpur, IN
Source
The Journal of the Indian Mathematical Society, Vol 36, No 3-4 (1972), Pagination: 243-253Abstract
The object of the present paper is to establish certain finite summation formulae for the Lauricella's hypergeometric function FA and to derive some generating functions for the Jacobi polynomials by specializing the parameters in FA. Most of the results obtained are believed to be new.- On some Results Involving Jacobi Polynomials
Abstract Views :147 |
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Authors
Affiliations
1 Department of Mathematics, University of Jodhpur, Jodhpur (Rajasthan), IN
1 Department of Mathematics, University of Jodhpur, Jodhpur (Rajasthan), IN