K–Ar age of the late Pleistocene eruption of Toba, north Sumatra

  title={K–Ar age of the late Pleistocene eruption of Toba, north Sumatra},
  author={D. Ninkovich and N. Shackleton and A. Abdel-Monem and J. Obradovich and G. Izett},
  • D. Ninkovich, N. Shackleton, +2 authors G. Izett
  • Published 1978
  • Geology
  • Nature
  • The late Pleistocene eruption of Toba is the largest magnitude explosive eruption documented from the Quaternary. K–Ar dating of the uppermost unit of the Toba Tuff gives an age of ∼ 75,000 yr. A chemically and petrographically equivalent ash layer in deep-sea cores helps calibrate the Stage 4–5 boundary of the standard oxygen isotope stratigraphy. A similar ash in Malaya that overlies finds of Tampan Palaeolithic tools indicates that they are older than 75,000 yr. 
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