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Palaeoclimatic inferences from the behaviour of radiocarbon dates of carbonates from Sand Dunes of Rajasthan

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Abstract

Radiocarbon dates on pedogenic CaCO3, accumulated at various depths in a stabilised dune at Budha Pushkar, Rajasthan, show inversion with respect to ‘stratigraphy’. Occurrence of younger carbonates overlain by older ones at various levels, is interpreted in terms of a shift in climatic conditions causing pedogenic carbonates to be leached to greater depths. Based on this model, several wetter regions during the last 6000 years have been identified. The most significant shift from a dry to a wet phase seems to have taken place between 5000 and 4500 years ago. Conclusions drawn from this study is in agreement with that based on pollen data and extends this method as a potential palaeoclimatic indicator.

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Authors and Affiliations

  1. Physical Research Laboratory, 380 009, Ahmedabad, India

    R V Krishnamurthy & D P Agrawal

  2. Deccan College, 411 006, Pune, India

    V N Misra & S N Rajaguru

Authors
  1. R V Krishnamurthy
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  2. D P Agrawal
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  3. V N Misra
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  4. S N Rajaguru
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Krishnamurthy, R.V., Agrawal, D.P., Misra, V.N. et al. Palaeoclimatic inferences from the behaviour of radiocarbon dates of carbonates from Sand Dunes of Rajasthan. Proc. Indian Acad. Sci. (Earth Planet Sci.) 90, 155–160 (1981). https://doi.org/10.1007/BF02880260

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  • DOI: https://doi.org/10.1007/BF02880260

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