Hydrological changes and landform evolution since the Bølling-Allerød interstadial in the Eastern Great Rann of Kachchh, India Ayushi Bhatnagar, Anil D Shukla, Mamata Ngangom, Mahesh Thakkar, Gaurav Chauhan, et al. Holocene, 2025 The post-glacial (Bølling-Allerød) sedimentary archive preserved in the Eastern Great Rann of Kachchh (EGRK) is used to reconstruct the pattern of Indian Summer Monsoon (ISM) variability, landform evolution, and the impact on the Indus Valley Civilization (IVC). Employing the sedimentology, geochemistry, and chronology supported by statistical analysis, four major phases of strengthened and weakened monsoon conditions are inferred. The pattern of geochemical variability during Phase-I (13.6 ka and 12.7 ka) indicates a relatively wetter condition (improved ISM); following this, during phase-II (11.9 ka and 11.1 ka), the ISM strength weakened. However, the ISM began to restrengthen during the phase-III (11 ka and >5 ka), with fluctuations. The phase-IV (<5 ka) is represented by a gradual decline in the ISM strength. The sediment isotopic analysis (Sr and Nd) reveals that the Indus River was the major contributor (~48%), followed by the contribution from local reworking of Mesozoic lithology from Khadir Island (~35%). The northern Thar Dune field contribution by ephemeral streams was around 14%, whereas the influence of Luni River at Trangadi Bet was insignificant (~3%). The study observed that around 7 ka, hydrological conditions dwindled, which persisted during the IVC, dated to 5.5 ka–3.8 ka in the region. However, despite dwindling freshwater from the branch off northwest-southeast trending paleochannel (via Indus), it has been hypothesized that the IVC in the EGRK (at Dholavira on Khadir Island) was sustained by the ephemeral monsoon-fed channels.
Continental-marine interaction in the vicinity of the nara river during the last 1400 years, great Rann of Kachchh, Western India Current Science, 2012
Terrain response to the 1819 Allah Bund earthquake in western Great Rann of Kachchh, Gujarat, India Current Science, 2012
Terrain response to the 1819 Allah Bund earthquake in western Great Rann of Kachchh, Gujarat, India Current Science, 2012
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Correction: Spatio-temporal analysis of climate-induced multi-hazards in Ladakh using geospatial techniques P Chauhan, M Ngangom Discover Geoscience 4 (1), 126 , 2026 2026
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Hydrological changes and landform evolution since the Bølling-Allerød interstadial in the Eastern Great Rann of Kachchh, India A Bhatnagar, AD Shukla, M Ngangom, M Thakkar, G Chauhan, ... The Holocene, 09596836251366207 , 2025 2025
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Analysis of sediment provenance using geochemical and isotopic data for a post-LGM sediment core from the western Great Rann of Kachchh, India: Implications for climate control … A Bhatnagar, AD Shukla, M Ngangom, MG Thakkar, J Dubey, R Bhushan Palaeogeography, Palaeoclimatology, Palaeoecology 644, 112185 , 2024 2024 Citations: 2
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Rather than the Decline of any Major Fluvial System M Ngangom, MG Thakkar Rivers of India: Past, Present and Future, 197 , 2024 2024
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What is the Noble gas composition and inventory in Venus interior? MN Satvika Jaiswal, Ramakant R. Mahajan 19th VEXAG Meeting 2021, 8011 , 2021 2021
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MOST CITED SCHOLAR PUBLICATIONS
Terrain response to the 1819 Allah Bund earthquake in western great rann of Kachchh, Gujarat, India MG Thakkar, M Ngangom, PS Thakker, N Juyal Current Science, 208-212 , 2012 2012 Citations: 48
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Mid-Holocene extreme hydrological events in the eastern Great Rann of Kachchh, western India M Ngangom, S Bhandari, MG Thakkar, AD Shukla, N Juyal Quaternary International 443, 188-199 , 2017 2017 Citations: 35
Continental–marine interaction in the vicinity of the Nara River during the last 1400 years, Great Rann of Kachchh, Western India M Ngangom, MG Thakkar, R Bhushan, N Juyal Current Science, 1339-1342 , 2012 2012 Citations: 32
Response of a dryland fluvial system to climate–tectonic perturbations during the Late Quaternary: Evidence from Rukmawati River basin, Kachchh, western India A Das, F Bhattacharya, BK Rastogi, G Chauhan, M Ngangom, ... Journal of Earth System Science 125 (6), 1119-1138 , 2016 2016 Citations: 14
Morphometric characterization and neotectonic evolution of island belt uplift of Kachchh, Western India M Ngangom, MG Thakkar 2016 Citations: 12
Spatio-temporal analysis of climate-induced multi-hazards in Ladakh using geospatial techniques P Chauhan, M Ngangom Discover Geoscience 4 (1), 100 , 2026 2026 Citations: 2
Hydroclimate dynamics and their impact on vegetation health in the Luni River Basin, Western India: a multi-index assessment using remote sensing P Chauhan, M Ngangom, MG Thakkar Modeling Earth Systems and Environment 11 (3), 162 , 2025 2025 Citations: 2
Drought Assessment Using Remote Sensing Techniques in the Great Rann of Kachchh and Adjoining Areas of Thar Desert P Chauhan, M Ngangom, MG Thakkar Journal of the Indian Society of Remote Sensing 53 (3), 773-789 , 2025 2025 Citations: 2
Temporal Changes in Land-Sea Configuration Inferred from Post-Glacial Sedimentation Pattern in the Western Great rann of Kachchh, India MGTGC Ayushi Bhatnagar, Anil D. Shukla, Mamata Ngangom Journal of Geosciences Research 10 (1), 1-6 , 2025 2025 Citations: 2
Analysis of sediment provenance using geochemical and isotopic data for a post-LGM sediment core from the western Great Rann of Kachchh, India: Implications for climate control … A Bhatnagar, AD Shukla, M Ngangom, MG Thakkar, J Dubey, R Bhushan Palaeogeography, Palaeoclimatology, Palaeoecology 644, 112185 , 2024 2024 Citations: 2
Heavy noble gas in eucrites and diogenites: An attempt to understand the trapped components MN S Jaiswal, RR. Mahajan 52nd Lunar and Planetary Science Conference, 2021, 1183 , 2021 2021 Citations: 2
Assessment of the Last 50 Years Temporal Changes in the Two Ramsar Sites of Rajasthan—Keoladeo National Park and Sambhar Lake Using Remote Sensing and GIS Techniques P Chauhan, M Ngangom Remote Sensing and GIS Application in Forest Conservation Planning, 153-173 , 2025 2025 Citations: 1
Decline of Dholavira Urban Settlement of Harappan Civilization in Kachchh was Associated with Global Climate Change Rather than the Decline of any Major Fluvial System M Ngangom, MG Thakkar Rivers of India: Past, Present and Future, 197-216 , 2024 2024 Citations: 1
Correction: Spatio-temporal analysis of climate-induced multi-hazards in Ladakh using geospatial techniques P Chauhan, M Ngangom Discover Geoscience 4 (1), 126 , 2026 2026
Hydrological changes and landform evolution since the Bølling-Allerød interstadial in the Eastern Great Rann of Kachchh, India A Bhatnagar, AD Shukla, M Ngangom, M Thakkar, G Chauhan, ... The Holocene, 09596836251366207 , 2025 2025
Cosmic Ray Exposure Ages of HED Meteorites: Unveiling the Neon Isotope Record S Jaiswal, RR Mahajan, M Ngangom LPI Contributions 3090, 1100 , 2025 2025
Rather than the Decline of any Major Fluvial System M Ngangom, MG Thakkar Rivers of India: Past, Present and Future, 197 , 2024 2024
NDVI-Based Vegetation Dynamics on Coastal Dunes Responses to Climatic Change in Western Kachchh, India GCDP Kamna Sharma, Ngangom Mamata Devi, M.G. Thakkar Gis Science Journal 11 (1), 17-34 , 2024 2024
Understanding Vesta from HED Meteorites: the noble gas perspective SJM Ngangom Journal of Indian Geophysical Union 27 (1), 1-9 , 2023 2023
