[meteorite-list] Debate Over Younger Dryas Impact Hypothesis Continues

[Paul H.]

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 
http://news.sciencemag.org/sciencenow/2010/08/mammoth-killer-impact-rejected.html

Dalton, R., 2010, Comet theory carbonized: Sediment 
studies rule out impact as cause of ancient cold spell.
Nature News. August 31, 2010. 
http://www.nature.com/news/2010/100831/full/news.2010.441.html

Impact hypothesis loses its sparkle, Physorg.
August 30, 2010, 
http://www.physorg.com/news202382634.html
http://www.physorg.com/news195979458.html

Kerr, R. A, 2010, Mammoth-Killer Impact Flunks Out.
Science, vol.  329, no. 5996, pp. 1140 - 1141
DOI: 10.1126/science.329.5996.1140 
http://www.sciencemag.org/cgi/content/summary/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 
http://www.pnas.org/content/early/2010/08/26/1003904107.abstract?sid=f62eef7c-9d13-48e9-a003-ddd93d93d75b

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 :
http://cci.siteturbine.com/facultystorm/profile/research/publication.php?publicationId=7406
http://www.climatechange.umaine.edu/people/profile/andrei_kurbatov

Thus, the debate continues.

Yours,

Paul H.