[meteorite-list] AD: Holocene start impacts

From: E.P. Grondine <epgrondine_at_meteoritecentral.com>
Date: Tue, 18 Nov 2008 07:01:16 -0800 (PST)
Message-ID: <929005.11270.qm_at_web36906.mail.mud.yahoo.com>

Hi all -

Forwarded from the Cambridge Conference

13) YDB/CLOVIS COMET AT AGU

Dear Benny:

I am writing to share the news about the discovery of billions of diamonds per cm3 associated with the proposed Younger Dryas impact event, or "Clovis Comet," as it is sometimes called. Data on the discovery will be presented on December 15-16 at the American Geophysical Union's annual Fall Meeting in San Francisco. On December 16, there will be 4 talks (http://www.agu.org/cgi-bin/sessions5?meeting=fm08?=PP23D&maxhits=400), and the day before, on December 15, there will be 8 poster presentations (http://www.agu.org/cgi-bin/sessions5?meeting=fm08?=PP13C&maxhits=400 - Scroll down to PP13C-1469 through 1477). As you and your readers may remember, data on about a dozen other lines of impact evidence were presented to AGU at the Acapulco Joint Assembly in 2007. Since then, the hypothesis has created considerable controversy.

The lead presentation will reveal the discovery of all three diamond allotropes (cubic diamond, lonsdaleite, and n-diamond) in the YDB impact layer, dating to the Younger Dryas onset at 12.9 ka (as well as the new discovery of lonsdaleite and n-diamonds in the KT boundary). The YDB diamonds are distributed broadly across N America and NW Europe at 15 sites spanning 9,000 km or 23 percent of Earth's circumference. N-diamonds and lonsdaleite, or hexagonal diamond, do not co-occur with terrestrial diamonds, but are found in meteorites. Lonsdaleite is found on Earth only in association with known ET impacts, and thus, is a definitive impact indicator. No diamonds have ever been detected in sediments above or below the YD impact layer.

Some critics have suggested that all the inferred impact material is nothing more than typical meteoritic ablation products and that the indicators rained down from the heavens non-catastrophically over time. This hypothesis is refuted by the presence of millions of diamonds inside single carbon spherules that formed rapidly from charred tree sap. Our research, which has resulted in a patent application for a new process to create diamonds, indicates that they could have only formed during the extraordinarily high temperatures and pressures that existed during an impact. The "cosmic rain" was heavy and far from gentle.
 
I have also placed a PDF of them on my website here: http://www.georgehoward.net/finalAGUabstracts.pdf

Kind regards.

George A. Howard | Partner
Restoration Systems, LLC
1101 Haynes Street, Suite 211
Raleigh N.C. 27604
www.restorationsystems.com
www.georgehoward.net

I think that pretty well explains those mammoth bodies piled up along the river in Alaska that Hibben saw. And gives the reason for some of the peoples' "strange " tales.

Of course, you can read a few of the peoples accounts of this in my book, personally signed copies of which are available from me for $20 plus $5 priority mail shipping US, or plus $15 for shipping overseas. The book is in English.

Now if there were only some larger carbonaceous chondrites to sell, or some nice shatter cones, or some impact glasses bigger than spherules.

E.P. Grondine
Man and Impact in the Americas




      
Received on Tue 18 Nov 2008 10:01:16 AM PST