reply to post by Hanslune
Bad Astronomy is not my kind of place.
However, i only bring up sublimation as an example. 
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reply to post by Hanslune
I saw this when it aired: www.pbs.org... and in this documentary, researchers modeled the sort of impact that would have been
responsible for the extinction of large mammals in North America during that time... without leaving an impact crater.
Here's where you can see the program in segments: www.pbs.org...
[edit on 8-4-2009 by X-tal_Phusion]
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there are too many occurences of a great flood happening when looking at the mythos of many cultures... And I don't buy the theory about this simply
being a story that spread from culture to culture, with the original story creator being affected by a great flood, either global or regional.
It seems as if many debunkers simply like to create a counter-story that in their mind seems more logical, when in fact their "theory" of what
really happened is often no better or credible than the original story. They demand proof where it is not even possible to obtain, yet never offer
proof to back theyre claims of it being untrue.
I say prove to me its NOT true!!
I understand that its good to ponder all things with a degree of skepticism, but some people seem to do it from an imagined position of great
intelligence, to serve their own ends, or simply to go against the grain. Either way, it usually says alot about their personality 
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New studies are in on this subject
This post based on one by Paul H at the Hall of Ma'at
North America comet theory questioned. No evidence of an extraterrestrial impact 13,000 years ago, studies say by Rex Dalton, Nature News, Published
The article
The paper is here:
The paper
Surovell, T. A., V. T. Holliday, J. A. M. Gingerich, C. Ketron, C. Vance
Haynes, Jr., I. Hilman, D. P. Wagner, E. Johnson, and P. Claeyse. 2009,
An independent evaluation of the Younger Dryas extraterrestrial impact
hypothesis. Published online before print October 12, 2009
More studies as I understand it are underway. As I have noted before it will take another 10-15 years of studies to get a handle on what happened. If
we're lucky a clear picture will emerge or if the picture is unclear and we have contradictory data we're be unlucky and the debate will go on
forever.....well at least until the event to find it is found.
Surovell's co-author Vance Holliday, an archaeologist at the University of Arizona in Tucson, and his colleagues have an article in press at Current
Anthropology that says the archaeological and geochronological records don't support a collapse of Clovis people at the time of the purported
impact.
I'd suggest reading both the article and paper.
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reply to post by Hanslune
Hi hans
I'll see your paper and raise you this paper
Shock-synthesized hexagonal diamonds in Younger Dryas boundary sediments
Douglas J. Kennetta,1, James P. Kennettb, Allen Westc, G. James Westd, Ted E. Bunche, Brendan J. Culletona, Jon M. Erlandsona,f, Shane S. Que Heeg,
John R. Johnsonh, Chris Merceri,j, Feng Shenk, Marilee Sellerse, Thomas W. Stafford, Jrl, Adrienne Stichm, James C. Weavern, James H. Wittkee and
Wendy S. Wolbachm
The long-standing controversy regarding the late Pleistocene megafaunal extinctions in North America has been invigorated by a hypothesis
implicating a cosmic impact at the Ållerød-Younger Dryas boundary or YDB (≈12,900 ± 100 cal BP or 10,900 ± 100 14C years). Abrupt ecosystem
disruption caused by this event may have triggered the megafaunal extinctions, along with reductions in other animal populations, including humans.
The hypothesis remains controversial due to absence of shocked minerals, tektites, and impact craters. Here, we report the presence of
shock-synthesized hexagonal nanodiamonds (lonsdaleite) in YDB sediments dating to ≈12,950 ± 50 cal BP at Arlington Canyon, Santa Rosa Island,
California. Lonsdaleite is known on Earth only in meteorites and impact craters, and its presence strongly supports a cosmic impact event, further
strengthened by its co-occurrence with other nanometer-sized diamond polymorphs (n-diamonds and cubics). These shock-synthesized diamonds are also
associated with proxies indicating major biomass burning (charcoal, carbon spherules, and soot). This biomass burning at the Younger Dryas (YD) onset
is regional in extent, based on evidence from adjacent Santa Barbara Basin and coeval with broader continent-wide biomass burning. Biomass burning
also coincides with abrupt sediment mass wasting and ecological disruption and the last known occurrence of pygmy mammoths (Mammuthus exilis) on the
Channel Islands, correlating with broader animal extinctions throughout North America. The only previously known co-occurrence of nanodiamonds, soot,
and extinction is the Cretaceous-Tertiary (K/T) impact layer. These data are consistent with abrupt ecosystem change and megafaunal extinction
possibly triggered by a cosmic impact over North America at ≈12,900 ± 100 cal BP.
www.pnas.org...
eventually people will accept that it happened,
But it wasnt a biblical global deluge.
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My stance as usual some where in the middle.
Its my position that the biblical flood is a composite of two events widely separated by time.
There is a dim memory of the flooding of the black sea basin some 9k? years ago and a much newer event some 4-1/2k years ago. This is the event
referenced in contemporary mesopotamian records.
There is burgoening evidence that there was yet another heavenly interloper in the affairs of man, the possible object that left burckle crater in
the indian ocean.
As in this thread
www.abovetopsecret.com...
Like was mentioned inthat thread this was not the same flood referenced by the native americans.
But the floods referenced by the native americans were all the same flood either.
some were a memory of the devastating glacial lake break outs.
Some are of other large but local floods. And some are rememberences of thr great melt off caused by the younger dryas impact.
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