Journal
JOURNAL OF GEOLOGY
Volume 126, Issue 5, Pages 553-560Publisher
UNIV CHICAGO PRESS
DOI: 10.1086/698821
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- Council of Scientific and Industrial Research, New Delhi [24/0310/10/EMR-II]
- Indiana University
- Syracuse University
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We report a newly determined age (1647 +/- 18 Ma) for a rare magmatic zircon extracted from a very fine-grained felsic ash bed in the type area of the Porcellanite Formation, Vindhyan Supergroup, India, and chemical compositions of two samples from this ash bed. The new results, in the context of published literature, (1) firmly establish the age of the Porcellanite Formation between approximate to 1640 and 1630 Ma and (2) suggest that Plinian eruptions took place from isolated vents along a 300-km crustal fracture.
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