The Chhari Dhandh (lake), located at the periphery of Banni plains, is a lacustrine archive in the hyper arid regime of Kachchh in western India. In the present study, the geochemical proxy approach has been made to reconstruct the signals from the past climate conditions on the core retrieved from the Chhari lake, which is supported by the radiocarbon and optical dating methods. The research identifies five significant climatic events of alternate humid (warm) and dry (cold) climatic conditions spanning the last ~2400 cal yr BP. The signatures of the Roman Warm Period, Cold Dark Ages and Medieval Warm Period suggest the strong archiving potential of this landscape for past climatic signatures. The top part of the sedimentary record also reports climatic conditions resembling the global event of Little Ice Age, but this information is speculative due to a lack of chronological support. The study again highlights the Kachchh landscape as a robust and unique natural laboratory to assess climate and tectonic processes.
The aim of this work is to unravel the role of geomorphic indicators and/or signatures to be used as evidence for palaeo-environmental changes and other forcing mechanisms from the lower reaches of the Sabarmati river basin, Gujarat, India region. In the present study, geomorphic features have been used as archives to debate the past land-sea interactions using satellite imagery. In the lower reaches of the Sabarmati river, a number of meanders, sinuosity changes, palaeochannels, and scroll plains have been identified. As a result of the rise and fall of the sea during the Holocene period, the changes in hydrodynamic and steady-state conditions of the river can be visualized in terms of changes in landforms. Thus, the intriguing geomorphic landforms in the lower portions of the Sabarmati basin delineate the likely archives and signs of previous environmental change, in particularly ~ the relative sea level change. This approach provides first-hand documentation of the fluvial evolution under the direct impact of the varying forcing mechanisms. This attempt shows the effectiveness of satellite images in unravelling the clues to past changes from the landscape in a fast and insightful manner.
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