All Toba tephra occurences across peninsular India belong to the 75,000 yr B.P. eruption
Dating ; Geochemistry ; India ; Pleistocene ; Quaternary ; Tephrochronology ; Trace-element ; Volcanic eruption
A controversy currently exists regarding the number of Toba eruptive events represented in the tephra occurences across peninsular India. Resolution of this issue was sought through detailed geochemical analyses of a comprehensive suite of samples
, allowing comparison of the Indian samples to those from the Toba caldera in northern Sumatra, Malaysia, and the sedimentary core at ODP Site 758 in the Indian Ocean. In addition, 2 samples of Toba tephra from western India were dated by fission-track method
. The results demonstrate that all the Toba tephra occurrences in peninsular India belong to the 75,000 yr B.P. Toba eruption.