Nanodiamonds in the Younger Dryas Boundary Sediment Layer

@article{Kennett2009NanodiamondsIT,
  title={Nanodiamonds in the Younger Dryas Boundary Sediment Layer},
  author={D. Kennett and J. Kennett and A. West and C. Mercer and S. Hee and L. Bement and T. E. Bunch and M. Sellers and W. Wolbach},
  journal={Science},
  year={2009},
  volume={323},
  pages={94 - 94}
}
  • D. Kennett, J. Kennett, +6 authors W. Wolbach
  • Published 2009
  • Medicine, Geology
  • Science
  • We report abundant nanodiamonds in sediments dating to 12.9 ± 0.1 thousand calendar years before the present at multiple locations across North America. Selected area electron diffraction patterns reveal two diamond allotropes in this boundary layer but not above or below that interval. Cubic diamonds form under high temperature-pressure regimes, and n-diamonds also require extraordinary conditions, well outside the range of Earth's typical surficial processes but common to cosmic impacts. N… CONTINUE READING

    Topics from this paper.

    No evidence of nanodiamonds in Younger–Dryas sediments to support an impact event
    43
    Comprehensive analysis of nanodiamond evidence relating to the Younger Dryas Impact Hypothesis
    10
    Nanodiamonds do not provide unique evidence for a Younger Dryas impact
    35

    References

    Publications referenced by this paper.
    SHOWING 1-9 OF 9 REFERENCES
    Synthesis and crystal structure of n-diamond
    30
    Atmospheric concentrations of radiocarbon are known to have varied unevenly across past millennia; accordingly, 10,900 radiocarbon years before present has been recalibrated and is equivalent to 12
      This research was funded by the NSF (grant ATM-0713769). We thank three anonymous reviewers and V. Haynes for assistance