A5069630548- Paleontology and Stratigraphy of Fossils
- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- Geochemistry and Geologic Mapping
- Geochemistry and Elemental Analysis
- earthquake and tectonic studies
- Methane Hydrates and Related Phenomena
- Hydrocarbon exploration and reservoir analysis
- Geological and Geophysical Studies
- Pleistocene-Era Hominins and Archaeology
- Geological formations and processes
- High-pressure geophysics and materials
- Paleontology and Evolutionary Biology
- Groundwater and Isotope Geochemistry
- Evolution and Paleontology Studies
- Microbial Community Ecology and Physiology
- Plant Water Relations and Carbon Dynamics
- Hydrology and Watershed Management Studies
- Groundwater and Watershed Analysis
- Plant Diversity and Evolution
- Geological Studies and Exploration
- Groundwater flow and contamination studies
- Soil and Water Nutrient Dynamics
- Astro and Planetary Science
- Pasture and Agricultural Systems
Tata Institute of Fundamental Research
2024
Teerthanker Mahaveer University
2024
Indian Institute of Management Lucknow
2016-2023
Indian Institute of Science Bangalore
2023
Chitkara University
2023
Physicotechnical Institute
2019
Banaras Hindu University
2018-2019
Schlumberger (Ireland)
2016
CSIRO Land and Water
1990-1996
National Geophysical Research Institute
1990
Abstract While studying the effect of drought on seed germination, water potentials are usually simulated by addition various osmotic substrates to water. Studies showing comparative effects these and true rather scarce. A study was undertaken whereby sodium chloride (NaCl)), mannitol, polyethylene glycol (PEG, 20,000 mol wt.), its germination characteristics Trifolium repens L., Lolium perenne Danthonia caespitosa Gaudich, Atriplex vesicaria Hew. ex Benth. A. nummularia Lindl. determined....
A monographic account is presented on the fossil Proterozoic cyanobacteria. It chronicles 60 years of history investigations Precambrian microfossils. The researches microfossils have revealed a new, earlier unknown, world oldest microorganisms and divulged steps in life’s evolution earth. Documented records show that cyanobacteria occupied all available ecological niches biosphere filamentous coccoidal were dominant microbial community. Extinct fossilized diagenetic cherts are comparable...
Abstract Studies evaluating simultaneous effects of more than one environmental factor on germination are rather scarce. Population dynamics plant species would be understood better provided these known. A study was undertaken to investigate the interactive temperature with matric and osmotic potential characteristics three dryland species, Danthonia caespitosa Gaudich, Atriplex nummularia Lindl. A. vesicaria Hew. ex Benth. Matric potentials were simulated by aqueous solutions polyethylene...
Highlight: A detailed examination was made into the soil arid and semi-arid regions of Australia (Leigh Noble, salinity distribution two Atriplex communities, A. vesicaria nummularia, established at regular spacings on 1969) other parts world.They are tolerant to types.The results based total soluble salts chloridesdrought have high salt content in their leaves suggested that both saltbush species induced significantly (Wood, 1925;Beadle et al., 1957).Our own studies (Sharma higher 0-15 cm...
The geological timescale before 720 Ma uses rounded absolute ages rather than specific events recorded in rocks to subdivide time. This has led increasingly mismatches between subdivisions and the features for which they were named. Here we review formal processes that current timescale, outline rock-based concepts could be used pre-Cryogenian time propose revisions. An appraisal of Precambrian rock record confirms purely chronostratigraphic subdivision would require only modest deviation...
Research Article| November 01, 2014 Fossil evidence of iron-oxidizing chemolithotrophy linked to phosphogenesis in the wake Great Oxidation Event Chris H. Crosby; Crosby 1Department Earth Sciences, University Minnesota–Twin Cities, Minneapolis, Minnesota 55455, USA Search for other works by this author on: GSW Google Scholar Jake V. Bailey; Bailey Mukund Sharma 2Birbal Sahni Institute Palaeobotany, Lucknow 226007, India Author and Article Information Publisher: Geological Society America...
Abstract This paper highlights unique sites in Ladakh, India, investigated during our 2016 multidisciplinary pathfinding expedition to the region. We summarize scientific findings and site's potential support science exploration, testing of new technologies protocols within framework astrobiology research. Ladakh has several accessible, diverse, pristine extreme environments at very high altitudes (3000–5700 m above sea level). These include glacial passes, sand dunes, hot springs saline...
Abstract An abundant well-preserved assemblage of annulated carbonaceous compressions and impressions has been recorded from the intra-cratonic argillaceous sedimentary sequence Bhima basin in south India. Impressions Hulkal Formation belong to forms similar previously reported Sinosabellidites huainanensis , Protoarenicola baiguashanensis Pararenicola huaiyuanensis China. This paper discusses diversity, systematics, affinity, biostratigraphical potential global significance these remains....
Many facets of the early biosphere preserved in Proterozoic and Early Cambrian successions, recorded during 2011-2015, are reviewed.Recent advancements made Precambrian palaeobiology newer steps recognized organismal evolution global perspective vis-a-vis significance Indian records discussed.The palaeobiological evidence reported from India chronicled grouped under seven categories: MISS (Microbially Induced Sedimentary Structure) & stromatolites, acritarchs, OWM (Organic Walled...
Boron is associated with several Archean stromatolite deposits, including the tourmaline-rich Barberton stromatolites in South Africa and tourmaline-bearing pyritic laminae of 3.48 Ga Dresser Formation Pilbara Craton, Australia. also a critical element prebiotic organic chemistry, formation ribose, crucial component RNA. As geological evidence advances chemistry are now suggesting that hot spring activity may be origins life, an understanding boron its mobility isotopic fractionation...