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Agnihotri, Deepa

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

Source

Current Science, Vol 106, No 7 (2014), Pagination: 988-996

Abstract

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.

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Occurrence of Vertebraria indica (Unger) Feistmantel, 1877 - An Evidence for Coal-Forming Vegetation in Kothagudem Area, Godavari Graben, Telangana

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

Source

Current Science, Vol 110, No 3 (2016), Pagination: 419-423

Abstract

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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Agnihotri, Deepa

Late Permian and Triassic Palynomorphs from the Allan Hills, Central Transantarctic Mountains, South Victoria Land, Antarctica

Authors

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Abstract

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Full Text

Occurrence of Vertebraria indica (Unger) Feistmantel, 1877 - An Evidence for Coal-Forming Vegetation in Kothagudem Area, Godavari Graben, Telangana

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Source

Abstract

Full Text

Evidence of Wildfires in the Late Permian (Changsinghian) Zewan formation of Kashmir, India

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Abstract

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References

India International Science Festival 2015

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