Conclusion
The presence of rhyolites in the Panjal traps at Panthachuk was first brought to notice by late Prof. K. K. Mathur. The author studied the Panjal traps in some detail and as a result the acid rocks have been found to occur at two other places also,viz., at Cheshmashahi and Avantipur. These acid volcanic rocks are of the nature of rhyolites, trachytes and dacites and are very clearly different from basic volcanic rocks like andesites and basalts. These rocks are fairly abundant and must have played an important part in the Panjal volcanic activity.
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References
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Communicated by Prof. L. Rama Rao, F.A.SC.
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Ganju, P.N. The panjal traps: Acid and basic volcanic rocks. Proc. Indian Acad. Sci. 18, 125–131 (1943). https://doi.org/10.1007/BF03049655
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DOI: https://doi.org/10.1007/BF03049655