Occurrence of volcanic ash in the Quaternary alluvial deposits,lower Narmada basin,western India |
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| Authors: | Rachna Raj |
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| Institution: | (1) Department of Geology, Faculty of Science, M. S. University of Baroda, Vadodara, 390 002, India |
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| Abstract: | This communication reports the occurrence of an ash layer intercalated within the late Quaternary alluvial succession of the
Madhumati River, a tributary of the lower Narmada River. Petrographic, morphological and chemical details of glass shards
and pumice fragments have formed the basis of this study. The ash has been correlated with the Youngest Toba Tuff. The finding
of ash layer interbedded in Quaternary alluvial sequences of western Indian continental margin is significant, as ash being
datable material, a near precise time-controlled stratigraphy can be interpreted for the Quaternary sediments of western India.
The distant volcanic source of this ash requires a fresh re-assessment of ash volume and palaeoclimatic interpretations. |
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| Keywords: | Toba ash Quaternary alluvial deposits lower Narmada basin western India |
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