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Saturday, 4 September 2010

Debate Over Younger Dryas Impact Hypothesis Continues

Debate Over Younger Dryas Impact Hypothesis Continues

Saturday, September 4, 2010 3:39 AM
On the side of people disputing the Younger Dryas Impact
hypothesis there is:

Kerr, R. A., 2010, Mammoth-Killer Impact Rejected.
Science Now, August 30, 2010

Dalton, R., 2010, Comet theory carbonized: Sediment
studies rule out impact as cause of ancient cold spell.
Nature News. August 31, 2010.

Impact hypothesis loses its sparkle, Physorg.
August 30, 2010,

Kerr, R. A, 2010, Mammoth-Killer Impact Flunks Out.
Science, vol. 329, no. 5996, pp. 1140 - 1141
DOI: 10.1126/science.329.5996.1140

The paper is:

Daulton, T. L., N. Pinter, and A. C. Scott, 2010,
No evidence of nanodiamonds in Younger–Dryas
sediments to support an impact event. Proceedings
of the National Academy of Science of the United
States. Published online before print August 30, 2010,
doi: 10.1073/pnas.1003904107

On the other hand, the BBC Article stated:

“Allen West said further nanodiamond evidence in support
of the impact theory would be published in the coming weeks.”

One of these papers is:

Kurbatov, A. V., P. A. Mayewski, J. P. Steffensen, A. West, D. J.
Kennett, J. P. Kennett, T. E. Bunch, M. Handley, D. S. Introne,
S. S. Que Hee, C. Mercer, M. Sellers, F. Shen, S. B. Sneed, J. C.
Weaver, J. H. Wittke, T. W. Stafford, J. J. Donovan, S. Xie, J. J.
Razink Jr., A. Stich, C. R. Kinzie, W. S. Wolbach, Discovery of
a nanodiamond-rich layer in the Greenland ice sheet. Journal
of Glaciology, v. 56, n 199, 749-759.

PDF file at :

Thus, the debate continues.


Paul H.

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