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- Naresh C. Mehrotra
- Rupendra Babu
- Neerja Jha
- Prabhat Kumar
- Veeru Kant Singh
- Manoj Shukla
- A. Rajanikanth
- Ashutosh Josht
- R. C. Mehrotra
- P. P. Chakraborty
- Anirudh De
- Nilay Govind
- S. S. K. Pillai
- Arun Joshi
- Ram Awatar
- Deepa Agnihotri
- Sankar Chatterjee
- K. L. Meena
- R. K. Jain
- Andre Jasper
- Dieter Uhl
- Sundeep K. Pandita
- Jose Rafael Wanderley Benicio
- Etiene Fabbrin Pires
- Atila Augusto Stock Da Rosa
- Gulam D. Bhat
- S. Suresh K. Pillai
- K. Pauline Sabina
- N. C. Mehrotra
- Vartika Singh
- Anjum Farooqui
- Dhruv Sen Singh
- Ratan Kar
Journals
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Tewari, Rajni
- New Global Opportunities for Hydrocarbon Exploration in Neoproterozoic Basins of Indian Subcontinent
Abstract Views :232 |
PDF Views:2
Authors
Naresh C. Mehrotra
1,
Rupendra Babu
1,
Rajni Tewari
1,
Neerja Jha
1,
Prabhat Kumar
2,
Veeru Kant Singh
1,
Manoj Shukla
Affiliations
1 Birbal Sahni Institute of Paleobotany, 53, University Road, Lucknow-226007, IN
2 Zoology Department, Lucknow University, Lucknow-226007, IN
1 Birbal Sahni Institute of Paleobotany, 53, University Road, Lucknow-226007, IN
2 Zoology Department, Lucknow University, Lucknow-226007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 72, No 4 (2008), Pagination: 543-546Abstract
First record of Type I matured, Liptinite organic matter facies from the Gotan Limestone (Late Neoproterozoic) in Rajasthan is considered significant. This throws open an entirely new basin for hydrocarbon exploration from the Neoproterozoic sediments in Rajasthan and other similar prospective basins in India. The palynological assemblage recorded from the studied samples also contains larve of the petroleum fly Helaeomyia (=Psilopa Coquillet) petrolei, known to live in pools of crude petroleum. The significance of the find is discussed in this brief communication.Keywords
Hydrocarbon Exploration, Neoproterozoic Basins, Rajasthan.
- Palynology of Permian Gondwana Sequence of Umrer Coalfield, Maharashtra
Abstract Views :188 |
PDF Views:2
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 69, No 4 (2007), Pagination: 851-857Abstract
Quantitative and qualitative palynological analysis of Early Permian sediments, Umrer Coalfield, Wardha Basin has been carried out. The microspore assemblage consists of 22 genera and 40 species. It is characterized by dominance of radial monosaccates chiefly, Parasaccites and subdominance of Non-Striate disaccates chiefly, Scheuringipollenites. Presence of Crucisaccites and Caheniasaccites suggests Upper Karharbari (Late Sakmarian-Early Artinskian) affinity. The presence of the Karharbari palynozone has been demarcated in lithologically designated Barakar Formation. The present finding corroborates the earlier studies by Bharadwaj and Anand Prakash (1974).Keywords
Palynology, Early Permian, Karharbari, Barakar, Umrer Coalfield, Maharashtra.- Occurrence of Plant Mega- and Microfossils from Barakar and Raniganj Formations of Manuguru Area, Godavari Graben, Andhra Pradesh
Abstract Views :167 |
PDF Views:2
Authors
Rajni Tewari
1,
Neerja Jha
1
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 67, No 1 (2006), Pagination: 101-112Abstract
Plant mega- and microfossils are reported in the bore core 726 from Manuguru area, Godavari Graben, Andhra Pradesh. Plant megafossils Gangamopteris sp., Glossopteris indica, G.subtilis, G. sastrii, Glosspteris sp. cf G. teluinervis, Glossopteris sp. and equisetalean axes are recorded in the sediments lithologically identified as Baraker Formation while Noeggerathiopsis hislopii, Glossopteris communis and G. stenoneura occur in the sediments lithologically recognized as Raniganj Formation. Plant microfossil studies carried out in these sediments reveal presence of three palynoassemblages, one belonging to Barakar Formation at 596-636 m and two belonging to Raniganj Formation at 379-580 m. A review of distribution of plant megafossils in Permian sediments of Godavari Graben reveals that the megafloral taxa of present study have been recorded for the first time from the Lower Gondwana of Godavari Graben. A comparative analysis of mega- and microfloral assemblages with the known stratigraphic age of Lower Gondwana sediments of Godavari Graben has also been attempted.Keywords
Glossopteris, Megafossils, Permian, Palynology, Lower Gondwana, Manuguru Area, Godavari Graben, Andhra Pradesh.- Plant Remains from the Upper Siwalik Sediments of West Kameng District, Arunachal Pradesh
Abstract Views :178 |
PDF Views:2
Authors
Affiliations
1 Geological Survey of India, Lucknow, IN
2 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow 226 007, IN
3 Indian School of Mines, Dhanbad, IN
4 Tcntulbena, Kolkata, IN
1 Geological Survey of India, Lucknow, IN
2 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow 226 007, IN
3 Indian School of Mines, Dhanbad, IN
4 Tcntulbena, Kolkata, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 61, No 3 (2003), Pagination: 319-324Abstract
Three subdivisions of Siwalik, vi/ , Lower, Middle and Upper are exposed m reverse stratigraphtc order in the Kameng District of Arunachal Pradesh. A rich assemblage of plant fossils is present in the Siwalik Group of rocks. The megaplant remains including one leaf compression and cuticular fragment from the Upper Siwalik of the West Kameng District have been described. The leaf compression shows its affinities with Termmaha catappa of Combretaceae whereas the cuticular fragment is assignable to Pihpancittis Roselt and Schneider and has been described as a new species named P arunachalensis sp nov. The presence of T calappcns very significant as it points to coastal depositional environment.Keywords
Leaf Compression, Cuticular Fragment, Termmaha Catappa, Upper Pliocene-Pleistocene, Siwalik Group, West Kameng District, Arunachal Pradesh.- IGMIS - a Computer-Aided Information System on Indian Gondwana Megaspores
Abstract Views :194 |
PDF Views:80
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
Current Science, Vol 106, No 3 (2014), Pagination: 434-439Abstract
The Indian Gondwana Megaspore Information System (IGMIS) is an information system developed for storage and retrieval of Indian Gondwana megaspore (female reproductive unit of early land plants) records in a selective manner. At present, it provides information on 45 genera and 159 species recorded from Palaeozoic and Mesozoic sediments of India. The use of the database is to store and organize information on Indian Gondwana megaspores accrued over the past 70 years. This information system is a significant step towards ensuring safety and accessibility of the data on the dispersed Indian fossil megaspores, besides providing accessibility for handling the information in future, including new and emerging types of data format. Each record has a unique code number for further reference. Addition, deletion, modification and search facility are provided by this software. Additionally, search can be performed in terms of different morphotaxonomical characteristics (single or combination of characters). The program is useful for a quick and classified megaspore search on datagrid, especially of the published information on fossil megaspores and their horizontal and vertical distribution in India. The program and associated database are capable of computer-aided identification of Indian Gondwana megaspores and help avoid assigning multiple/different genera or species to the same category. Here we report our attempt to digitize and provide an updated knowledge on various aspects of Indian Gondwana megaspores, including their morphotaxonomical characters, distribution and photodocumentation in an information system.Keywords
Computer-Aided Information System, Distribution, Megaspores, Morphotaxonomical Characters, Photo-Documentation.Full Text
- Late Permian and Triassic Palynomorphs from the Allan Hills, Central Transantarctic Mountains, South Victoria Land, Antarctica
Abstract Views :235 |
PDF Views:99
Authors
Ram Awatar
1,
Rajni Tewari
1,
Deepa Agnihotri
1,
Sankar Chatterjee
2,
S. S. K. Pillai
1,
K. L. Meena
1
Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226 007, IN
2 Texas Tech University, Lubbock, Texas 79401, US
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226 007, IN
2 Texas Tech University, Lubbock, Texas 79401, US
Source
Current Science, Vol 106, No 7 (2014), Pagination: 988-996Abstract
Palynology is an established tool for age determination and correlation of sedimentary sequences. The palynomorphs retrieved from the Weller and Lashly formations of Allan Hills, central Transantarctic Mountains, South Victoria Land, Antarctica have been studied for precise age determination. Forty-five different groups of palynomorphs have been recovered from the Weller and Lashly formations. The palynoflora of Weller Formation shows dominance of striate bisaccate pollen taxa, mainly Striatopodocarpites, Faunipollenites (Protohaploxypinus), Crescentipollenites, Striatites and Verticipollenites in association with Horriditriletes, Cuneatisporites, Alisporites, Plicatipollenites, Gnetaecaepollenites, Sahnites, Tiwariasporis, Rhizomaspora, Pretricolpipollenites, Chordasporites and sporadic occurrence of Lundbladispora, Klausipollenites and Densoisporites. In the present study, a Late Permian age based on palynological evidences has been suggested for the Weller Formation, which was earlier assigned an Early Permian age. The Late Permian age of the Weller Formation is corroborated by similarity of its palynoassemblage with that of the Upper Stage-5 (Late Permian) of Australia. Additionally, the palynoflora of Weller Formation is comparable with the Late Permian palynoassemblages of India and South Africa. The younger palynoassemblage of the Lashly Formation contains Klausipollenites, Falcisporites and Alisporites in prominence and shows rare occurrence of Minutosaccus, Goubinispora, Lundbladispora, Densoisporites, Aulisporites and Chordasporites, indicating Early to Middle Triassic age and showing affiliation with Aratrisporites parvispinosus zone of Australia, Alisporites zone (A&B) of Feather Conglomerate and Fremouw Formation of Antarctica.Keywords
Allan Hills, Antarctica, Late Permian, Palynology, Triassic.Full Text
- Occurrence of Vertebraria indica (Unger) Feistmantel, 1877 - An Evidence for Coal-Forming Vegetation in Kothagudem Area, Godavari Graben, Telangana
Abstract Views :261 |
PDF Views:118
Authors
Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226 007, IN
2 D.A.V. (P.G.) College, Dehradun 248 001, IN
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226 007, IN
2 D.A.V. (P.G.) College, Dehradun 248 001, IN
Source
Current Science, Vol 108, No 3 (2015), Pagination: 330-333Abstract
No Abstract.Full Text
- Evidence of Wildfires in the Late Permian (Changsinghian) Zewan formation of Kashmir, India
Abstract Views :257 |
PDF Views:132
Authors
Andre Jasper
1,
Dieter Uhl
1,
Deepa Agnihotri
2,
Rajni Tewari
2,
Sundeep K. Pandita
3,
Jose Rafael Wanderley Benicio
1,
Etiene Fabbrin Pires
4,
Atila Augusto Stock Da Rosa
5,
Gulam D. Bhat
6,
S. Suresh K. Pillai
2
Affiliations
1 Programa de Pos-Graduacao em Ambiente e Desenvolvimento, PPGAD. Centro Universitário Univates, Lajeado, BR
2 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow 226 007, IN
3 Department of Geology, University of Jammu, Jammu 180 006, IN
4 Universidade Federal do Tocantins, Porto Nacional, BR
5 Universidade Federal de Santa Maria, Santa Maria, BR
6 Directorate of Geology and Mining, Jammu and Kashmir Government, Srinagar 190 002, IN
1 Programa de Pos-Graduacao em Ambiente e Desenvolvimento, PPGAD. Centro Universitário Univates, Lajeado, BR
2 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow 226 007, IN
3 Department of Geology, University of Jammu, Jammu 180 006, IN
4 Universidade Federal do Tocantins, Porto Nacional, BR
5 Universidade Federal de Santa Maria, Santa Maria, BR
6 Directorate of Geology and Mining, Jammu and Kashmir Government, Srinagar 190 002, IN
Source
Current Science, Vol 110, No 3 (2016), Pagination: 419-423Abstract
The first record of palaeo-wildfire evidence in the form of charcoal is documented from the Late Permian Zewan Formation of the Kashmir region, northwest Himalaya. This evidence is in the form of fragments of tracheids that show homogenized cell walls, a characteristic feature of charcoal. Considering that palaeowildfire studies provide important palaeoecological information, the present study is significant, as it allows reconstructing new information about environmental conditions during the deposition of the sediments of the Late Permian Zewan Formation.Keywords
Charcoal, Gondwana, Himalayan Region, Late Palaeozoic, Marine Environment.Full Text
References
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- Abu Hamad, A. M. B., Jasper, A. and Uhl, D., The record of Triassic charcoal and other evidence for palaeo-wildfires: signal for atmospheric oxygen levels, taphonomic bias or lack of fuel? Int. J. Coal Geol., 2012, 96–97, 60–71.
- Jasper, A., Guerra-Sommer, M., Abu Hamad, A. M. B., Bamford, M., Bernardes-de-Oliveira, M., Tewari, R. and Uhl D., The burning of Gondwana: Permian fires on the southern continent – a palaeobotanical approach. Gondwana Res., 2013, 24, 148–160.
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- Permian Megaspores from Kuraloi Area, Ib-River Coalfield, Mahanadi Basin, Orissa
Abstract Views :176 |
PDF Views:0
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: 669-678Abstract
Heterogenous megaspores recovered from the Upper Permian sediments of Kuraloi Area, Ib-River coalfield, have been systematically described. The megaspore assemblage includes seven genera with seventeen species viz. Bokarosporites rotundus, Banksisporites indicus, B. utkalensis, Biharisporites spinosus, Biharisporites sp. A, Biharisporites sp. B, Jhariatriletes baculosus, J. srivastavae, J. damudicus, Manumisporites distinctus, Singhisporites baculatus, S. radialis, S. surangei, Ramispinatispora indica, R. nautiyalii and Ramispinatispora sp. Additionally, a new species of Ramispinatispora viz. R. mahanadiensis has been identified. Associated spore pollen assemblages are suggestive of a Late Permian age corresponding to Raniganj/Kamthi Formation. Raniganj megaspores are known from Damodar and Godavari Basins. The newly recorded megaspore assemblage from the Ib-River coalfield is comparable to that of Raniganj/Kamthi Formation of Godavari Graben. The diversity in exosporium ornamentations indicates structural diversity. Moreover, their prolific presence ultimately points towards occurrence of heterosporous source vegetation in the area.Keywords
Megaspores, Raniganj, Ib-River Coalfield, Mahanadi Basin, Orissa.References
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- Palynological Dating and Correlation of Surface and Subsurface Sediments from Wardha Valley Coalfield, Maharashtra
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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 77, No 2 (2011), Pagination: 137-148Abstract
42 genera of palynomorphs have been reported from the qualitative and quantitative analysis of the palynoflora from both open cast mine and bore holes viz., Ballarpur open cast mine, Durgapur open cast mine and Bore hole CMWNM-57 on barrier between Kawadi/Majri open cast and Hindustan Lalpeth Colliery from the Wardha valley coalfield of Wardha basin. Two palynoassemblages have been recorded i.e., an Upper Karharbari palynoassemblage comprising dominance of radial monosaccate genus Parasaccites and subdominance of nonstriate disaccate genus Scheuringipollenites and a Lower Barakar palynoassemblage consisting of dominance of Scheuringipollenites and subdominance of striate disaccates chiefly Faunipollenites, suggesting an Early Permian age (Late Sakmarian to Early Artinskian) to the sediments. It is further authenticated by the occurrence of palynotaxa viz., Crucisaccites, Caheniasaccites, Indotriradites and Tiwariasporis. Upper Karharbari Formation has been demarcated for the first time in lithologically designated Barakar Formations in Ballarpur, Durgapur, Majri and Hindustan Lalpeth Colliery while the sample 57/2 of bore hole CMWNM from Kawadi area may belong to the Kamthi Formation on the basis of pinkish yellowish coarse grained to medium grained sandstone. An attempt has been made to correlate these palynoassemblages with other Lower Gondwana basins of Early Permian affinity.Keywords
Palynomorphs, Early Permian, Upper Karharbari, Lower Barakar, Correlation, Wardha Valley Coalfield, Maharashtra.- Late Pleistocene and Early Holocene Climate of Ny-Alesund, Svalbard (Norway): A Study based on Biological Proxies
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Authors
Vartika Singh
1,
Anjum Farooqui
1,
Naresh C. Mehrotra
1,
Dhruv Sen Singh
2,
Rajni Tewari
1,
Neerja Jha
1,
Ratan Kar
1
Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow – 226 007, IN
2 Centre for Advance Studies in Geology, Lucknow University, Lucknow – 226 007, IN
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow – 226 007, IN
2 Centre for Advance Studies in Geology, Lucknow University, Lucknow – 226 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 78, No 2 (2011), Pagination: 109-116Abstract
Subsurface sediments of a 120 cm deep trench from Ny-Alesund, Svalbard, were analysed for pollenspores and other organic matter contents. This study is supported by two AMS 14C dates (27, 200 yrs BP and 8,762 yrs BP) at the bottom and topmost litho-unit of the trench, respectively. The pollen record provides an evidence of a warm interval at about 27,200 yr BP (Late Weichselian and MIS 3) and cooling episode around 8,762 yr BP. This is also supported by the amount and type of organic matter as well as sediment type and depositional history of the trench sediments.Keywords
Biological Proxies, Trench Section, Late Weichselian, Ny-Alesund, Svalbard.References
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