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

@article{Ninkovich1978KArAO,
  title={K–Ar age of the late Pleistocene eruption of Toba, north Sumatra},
  author={Dragoslav Ninkovich and Nicholas J. Shackleton and Abdalla A. Abdel-Monem and John D. Obradovich and Glen Arthur Izett},
  journal={Nature},
  year={1978},
  volume={276},
  pages={574-577}
}
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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