[meteorite-list] Kennett Talk and NOVA special on Younger Dryas Impacts Question?

From: Steve Dunklee <sdunklee72520_at_meteoritecentral.com>
Date: Wed, 25 Mar 2009 23:37:19 -0700 (PDT)
Message-ID: <600728.11911.qm_at_web33201.mail.mud.yahoo.com>

If a c chondrite or comet with considerable amount of carbon exploded over the polar ice sheet , could it create the nano diamonds without leaving behind a crater? as in an ice crater that melted? or was the land bridge in the Bearing Straits really an ice bridge? and was Northwest Africa made into a green paradise while north America was covered in ice? It seems to me the impact would have had a global effect causing winter everywhere for a while, including Africa. What supporting evidence can be found elsewhere? I am not trying to discount the research but believe there will be found other supporting data on a global scale. A time machine would be pretty handy to see what really happened!
have a great day!
and be thankful you never get hit by a train
Steve

--- On Wed, 3/25/09, Paul <bristolia at yahoo.com> wrote:

> From: Paul <bristolia at yahoo.com>
> Subject: [meteorite-list] Kennett Talk and NOVA special on Younger Dryas Impacts
> To: meteorite-list at meteoritecentral.com
> Date: Wednesday, March 25, 2009, 8:50 AM
>
> E.P. Grondine mentioned the below NOVA Special in his
> post,
> ?[meteorite-list] NOVA special on Holocene Start Impacts
> and AD?.
>
> PBS Program to Feature Two UMaine Scientists, March 23,
> 2009
> http://www.umaine.edu/news/view_release.php?x=1237809989
>
> Dr. Kennett gave a talk, which included a lot of research
> that is either
> being prepared for publication, been submitted for
> publication, and in
> press. Dr. Kennett made a very convincing case that
> something unique,
> extraordinary, and instantaneous occurred at the beginning
> of the
> Younger Dryas about 12,900 B. calender years ago and could
> be an
> event that was extraterrestrial in nature. His idea that it
> involved?
> multiple, simultaneous Tunguska-like events occurring
> across the
> North American continent.
>
> He also, discussed and showed pictures of the research on
> the
> Greenland ice sheet, carried out by Paul Mayewski, and
> Andrei
> Kurbatov. Outcropping along the edge of the Greenland Ice
> Sheet
> is a well defined Younger Dryas bed, which consists of dark
> grey
> dusty ice with clean, white Holocene ice above it and
> clean, white
> terminal Pleistocene ice below it. They found the
> nannodiamonds
> and other alleged impact indicators right at and only at
> the basal
> contact of the Younger Dryas ice layer. They found exactly
> what
> would be expected for an layer of meteoritic debris from
> Tunguska-
> like events.
>
> This is a show that you do not want to miss.
>
> It is in the realm of possibility, that decade or so from
> now, Dr.
> West, Dr. Kennett, and other members the YDB Group will
> likely
> be known as the "Walter Alvarezes of the Quaternary.
>
> I am now getting together with a couple of archaeologists
> to do
> some ?prospecting? for nannodiamonds and
> microspherules.
>
> Some relevant publications:
>
> Haynes, V. C., Jr., 2008, Younger Dryas ?black mats?
> and the
> Rancholabrean termination in North America. Proceedings of
> the
> National Academy of Sciences. vol. 105? no. 18?
> 6520-6525
> http://www.pnas.org/content/105/18/6520.abstract
>
> Did a Significant Cool Spell Mark the Demise of Megafauna?
> http://uanews.org/node/19409
>
> Kennett, J.D., J.P. Kennett, G.J. West, J.M. Erlandson,
> J.R.
> Johnson, I.L. Hendy, A. West, B.J. Culleton, T.L. Jones and
>
> Thomas W. Stafford Jr., 2008, Quaternary Science Reviews.
> vol. 27, no. 27-28, pp. 2530-2545.
> http://dx.doi.org/10.1016/j.quascirev.2008.09.006
>
> Kennett, D.J., J. P. Kennett, A. West, C. Mercer, S. S. Que
>
> Hee, and L. Bement, 2009, Nanodiamonds in the Younger Dryas
>
> Boundary Sediment Layer. Science. vol. 323, no. 5910, p.
> 94.
> http://www.sciencemag.org/cgi/content/abstract/323/5910/94
>
> Best Regards,
>
> Paul H
>
>
> ? ? ?
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Received on Thu 26 Mar 2009 02:37:19 AM PDT