A5060944346- Geological formations and processes
- Geology and Paleoclimatology Research
- Hydrology and Sediment Transport Processes
- Geochemistry and Geologic Mapping
- Hydrology and Watershed Management Studies
- earthquake and tectonic studies
- Plant Diversity and Evolution
- Plant and Fungal Species Descriptions
- Geological and Geophysical Studies
- Flood Risk Assessment and Management
- Marine and environmental studies
- Soil erosion and sediment transport
- Natural product bioactivities and synthesis
- Remote-Sensing Image Classification
- Image and Object Detection Techniques
- Hydrocarbon exploration and reservoir analysis
- Advanced Statistical Process Monitoring
- Geological Modeling and Analysis
- Geological Studies and Exploration
- Aeolian processes and effects
- Landslides and related hazards
- IoT and Edge/Fog Computing
- Groundwater and Watershed Analysis
- Blockchain Technology Applications and Security
- Fern and Epiphyte Biology
Indian Statistical Institute
2010-2025
Central Ground Water Board
2022
National Environmental Engineering Research Institute
2011
India Meteorological Department
2006
The Tibetan Plateau (TP)-Himalayan system and its originating large rivers contribute ∼40% of the total terrestrial sediments in global oceans. Understanding transport processes these is a prerequisite for interpreting marine sedimentary archives. Here, modern sands were collected along Yarlung Zangbo−Brahmaputra−Ganges river to trace sediment provenance from TP Bengal Delta by analyzing major elements Nd-Sr isotopes. We find that higher Na2O/SiO2 K2O/SiO2 ratios more radiogenic εNd (−10 −8)...
Equisetum (Equisetaceae) has long been a focus of attention for botanists and palaeontologists because, given its extensive well-documented fossil record, it is considered the oldest extant vascular plant key element in understanding evolution. However, to date, no authentic evidence found from Indian Cenozoic. Here, we describe new species, namely, E. siwalikum sp. nov., recovered middle Siwalik (Late Miocene) sediments Himachal Pradesh, western Himalaya. We identified specimens based on...
Abstract The coarse-grained alluvial succession of the Proterozoic Mancheral Quartzite encloses within it a few 2–6 m-thick, typically salmon red, fine-grained, very well-sorted sandstone units. Some 25–400f fine-grained units is aeolian — mostly adhesion laminae with subordinate cross-laminae and wind-ripple strata. remainder sequence aqueous; either massive or faintly-developed trough cross-bedding. Based on their grain size, sorting roundness, bulk aqueous deposits appear to be reworked...
Abstract River regulation by dams and embankments drastically reduce/alter flow, which affects the natural channel pattern. Existing braiding indices have seldom incorporated effects of diurnal flow variations caused hydropeaking, leading to over/underestimation intensity. These consider only visible wet channels, ignoring existence dry channels that are activated episodically during phases water release from hydropower dams. We extracted (those periodically wet) coursing across belt highly...
Abstract In order to investigate the effect of intervention structures like dams and barrage on sediment grain size distribution, we examined a ~75 km stretch Tista River in foothill alluvial plain eastern Himalayas. However, studies impact streamflow Himalayan rivers are constrained due inadequate historical gauge data. Therefore, employed simple method track initial formation some existing river landforms that formed before dam/barrage operations from yearly satellite images (1987–2017)...
Abstract The Ventilago Gaertn. (Rhamnaceae) is widely distributed in pantropical areas of Africa, Asia, and Australia. However, fossil records this taxon are sparse, which limits understanding the evolution biogeographic history genus. In present study, we report describe two new species , V. siwalika sp. nov. from Miocene sediments Himachal Pradesh, western Himalaya, V . pliocenica Pliocene Jharkhand, eastern India based on single‐winged samaras. characterized by a prominent midvein, obtuse...
Research Article| May 15, 2018 AMBER EMBALMS ESSENTIAL OILS: A RARE PRESERVATION OF MONOTERPENOIDS IN FOSSIL RESINS FROM EASTERN HIMALAYA SHARMILA BHATTACHARYA; BHATTACHARYA 1Department of Earth and Environmental Sciences, Indian Institute Science, Education Mohali, Punjab-140306, India 2Centre Advanced Study, Department Botany, University Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, 5Department Technology Bombay, Powai, Mumbai-400076, Search for other works by this author on: GSW...
Abstract Nine different types of cross‐stratified packages from the coal‐bearing, deltaic succession Barakar Formation (Permian) Satpura Gondwana Basin, central India, are described. The deposits characterized by periodic mudstone drapes, reactivation surfaces including all other features suggestive deposition periodically unsteady, tidally‐influenced flows. inferred flow patterns varied purely bidirectional to pulsating unidirectional. interpreted have resulted superimposition ebb‐oriented,...