Poonam Verma

Poonam Verma
Birbal Sahni Institute of Palaeobotany · Tertiary Palynology

PhD degree in Palaeosciences

About

39
Publications
15,643
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253
Citations
Additional affiliations
May 2006 - present
Birbal Sahni Institute of Palaeobotany
Position
  • Researcher

Publications

Publications (39)
Data
Full-text available
The records of Tertiary sedimentation in the Indian sub-continent brought to light thick geosynclinal and shelf deposits. Tertiary successions in India are exposed in four distinct areas, north-eastern India, southern India, western India and northern India and a good amount of palynological information is available these sequences. Inspite of good...
Article
Full-text available
Early Eocene sedimentary successions of south Asia, are marked by the development of extensive fossil-bearing, lignite-rich sediments prior to the collision of India with Asia and provide data on contemporary equatorial faunal and vegetational assemblages. One such productive locality in western India is the Vastan Lignite Mine representing approxi...
Chapter
At the dawn of the Paleogene that was the beginning of the Cenozoic era, the continents drifted farther apart, heading toward their modern positions. After India separated from Gondwana, it took 160million years to travel 9000 km northward from the Southern Hemisphere to Northern Hemisphere and to its modern geographical position coupled with Euras...
Article
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The equatorial evergreen forests nourish the world's biodiversity hotspots and are considered the lungs of the Earth. However, their future survival is uncertain, due to anthropogenically increased carbon emissions and changes in the hydrological cycle. Understanding the changes in the hydrological cycle in the equatorial region due to an increase...
Article
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The dominance of angiosperms, achieved around the late Cretaceous–early Palaeogene time, can be observed through multiple well-preserved fossil flowers and fruits described from the early Palaeogene sediments of Bikaner and Barmer (Rajasthan, India). Here, we report twelve pentamerous fossil flowers categorized into three morpho-types mainly based...
Article
The rainforests near the early Eocene palaeo-equator were more resilient to greenhouse warming than mid-latitude vegetation. The mechanism underlying that resilience remains poorly known due to the lack of reliable terrestrial climate data from the palaeo-equator. In this paper, we quantify terrestrial temperature data using a plant proxy approach...
Article
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In the present study, the assemblages of organic walled dinoflagellate cyst (dinocysts) and calcareous nannofossils from Quilon Formation, Kerala Basin, southwestern India are analyzed for age interpretation and reconstruction of the depositional environment. The integrated biostratigraphy based on dinocysts and calcareous nannofossils from the sam...
Chapter
Full-text available
The sedimentary successions of Kerala Basin are one of the rare onshore opportunity to study Neogene palaeoclimate of southwest India. Among the climate events of the Neogene, MMCO (Mid-Miocene Climate Optimum) that occurred around ~17–15 Ma is considered to be the most recent extreme global warming episode. The global warming during MMCO, created...
Chapter
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Calcareous nannofossilNannofossils biostratigraphy has been attempted for the first time on black shaleBlack shale of the Lower Member of the Spiti FormationSpiti Formation exposed in LangzaLangza area, Spiti ValleySpiti Valley, Himachal Pradesh. AmmonitesAmmonites and dinoflagellateDinoflagellate cysts biostratigraphyBiostratigraphy usually assign...
Article
Full-text available
This study reports the oldest fossil record of the genus Adina, A. vastanenesis n. sp., from the early Eocene of Vastan lignite mine (Cambay Shale Formation), Surat district, Gujarat. This fossil wood is characterized by diffuse porous wood, predominantly solitary tylosed vessels, simple perforations, scanty paratracheal to diffuse to sometimes dif...
Conference Paper
The present study deals with the intregated multi-proxy approach for finer age resolution of the Harudi Formation, Kutch Basin. The Harudi Formation was deposited during the major Eocene transgressive event (viz. Kirthar transgression). An age of the Harudi Formation is considered to be the Middle Eocene. However a dating on finer resolution is nee...
Article
Full-text available
Marine micropaleontology concerns biostratigraphy for dating and correlation of deep time sequences as well as in palaeoceanography to understand the marine processes of the past. For this, marine micropalaeontology utilizes detailed studies on exclusively marine microbiota such as foraminifers, nannofossils, diatoms, dinoflagellates, and others. T...
Article
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This study presents palynological analysis of lignite-bearing succession of Akri lignite mine, Kutch, Gujarat, and discussed the implications of the recovered palynomorphs for age, palaeovegetation and palaeoenvironments. A diverse palynological assemblage consisting of algal and fungal remains, pteridophytic spores, angiosperm pollen and dinoflage...
Poster
Full-text available
The Harudi Formation of the Kachchh basin was deposited during the marine transgression phase in the middle Eocene (Saraswati et al., 2018). This formation is well exposed in the western part of Kachchh forming a narrow belt under the overlying Nummulitic limestone (Biswas and Raju, 1973). During the late-middle Eocene, the major transgression took...
Article
The Palaeogene succession of Kutch, Gujarat exhibits huge shallow marine carbonate deposits of Middle Eocene and Oligocene ages. These deposits were mainly dated on the basis of larger benthic foraminifers. The paucity of foraminifers in the intermittent units of the succession resulted in discrepancy in precise dating of these strata. Lumpy Clay M...
Article
Full-text available
Amber is fossilized form of resin produced as the metabolic exudates from plants that serve defensive and protective biological purposes as well as other ecological functions. By virtue of excellent preservation potential of the amber, a diverse array of biota in extraordinarily pristine condition was recovered within the fossilized resins from Cam...
Article
Full-text available
The Kerala Basin is only onshore opportunity to study Cenozoic palaeoclimate and palaeoenvironment of southwest India encompassing Neogene global events such as Mid Miocene Climate Optimum (MMCO) and even older times of Palaeogene. The global warming during ~17–15 Ma (MMCO), enhanced annual surface temperature 3–4° C higher than the present, is equ...
Article
Full-text available
This study presents new results of combined palynological and stable carbon isotope (δ¹³C) investigations carried out in the well known lignite sequence at Panandhro, District Kutch, in the Gujarat state of western India. Dinoflagellate cysts and associated spore-pollen assemblage assign an early Eocene (Ypresian) age to the lignitic succession at...
Article
Verma P. & Rao M. R. 2014. Late Holocene vegetation and climate of Kusumelli Swamp in Sehore District, Madhya Pradesh, India. Geophytology 44(2): 127-132. The present study focuses on the palynological analysis of 1 m deep sediment trench profile from Kusumelli Swamp, in Sehore District, Madhya Pradesh, providing information on vegetation and clima...
Article
Full-text available
A rich palynological assemblage consisting of algal remains (5 genera and 7 species, including dinoflagellate cysts), fungal spores (2 genera and 3 species), pteridophytic spores (5 genera and 8 species), gymnospermous pollen grains (3 genera and 3 species) and angiospermous pollen grains (17 genera and 22 species) has been recorded for the first t...
Article
Full-text available
The records of Tertiary sedimentation in the Indian sub-continent brought to light thick geosynclinal and shelf deposits. Tertiary successions in India are exposed in four distinct areas, northeastern India, southern India, western India and northern India and a good amount of palynological information is available these sequences. Inspite of good...
Article
Full-text available
Verma P, Mandal N, Rao MR, Thakkar MG & Bajpai Sunil 2013. Palynological record from Chhasra Formation (Early Miocene), Eastern Kutch, Gujarat. The Palaeobotanist 62(2): 149-155. A moderately diverse palynoflora consisting of angiospermous pollen and pteridophytic spores has been recorded from poorly known Chhasra Formation (Early Miocene) exposed...
Article
Verma P & Rao MR 2013. Modern pollen and vegetation relationship in the teak deciduous forest in Sehore District, Madhya Pradesh. The Palaeobotanist 62(1): 55–63. Pollen analyses of 19 surface soil and mud samples in and around Kusumelli Swamp near Shahganj, Sehore District of Madhya Pradesh were carried out to understand modern pollen and vegetati...
Conference Paper
Full-text available
marked by Discoaster brouweri and D.pentaradiatus. Upper bathyal depositional conditions prevailed during Pliocene times. Early Pleistocene age has been assigned based on the predominance of Gephyrocapsa (small) spp. and Helicosphaera sellii. Upper bathyal depositional conditions persisted during Early Pleistocene times. The study presents the reco...
Article
Full-text available
The pollen analytical investigation on tw o sediment profiles from central Narmada Valley, Madhya Pradesh has provided sequential changes in vegetation and corresponding fluctuation in the climate during Late Pleistocene (Baneta Formation) and middle Holocene (Kusumelli sw amp) periods. Analysis and interpretation of generated proxy data allow s re...
Data
Full-text available
The Quaternary sequences of central Narmada Valley of India preserve a great wealth of diverse mammalian fossils including not only the oldest hominin fossil 1,2 but also a wide range of palaeo-lithic tools 3 . In spite of witnessing human evolution, social complexities and techno-cultural advancement since late Pleistocene with changing climate un...

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