[Rockhounds] Another extinction impact-13 KYA

[Dora Smith]

Here's more detail posted to a global warming list

If I understand correctly on a fast glance, they did find iridium, one of 
the minerals I was referring to, which strengthens the case.

I'd look for an earthbound volcano first, however.

http://www.sciam.com/article.cfm?id=did-a-comet-hit-earth-12900-years-ago

Yours,
Dora Smith
Austin, TX
tiggernut24 at yahoo.com
----- Original Message ----- 
From: "J Bryan Kramer" <codeburner at gmail.com>
To: "Rockhounds at drizzle.com: A mailing list for rock and gem collectors" 
<rockhounds at lists.drizzle.com>
Sent: Friday, January 02, 2009 9:11 AM
Subject: [Rockhounds] Another extinction impact-13 KYA


<
http://www.nytimes.com/2009/01/02/science/02impact.html?_r=2&partner=rss&emc=rss&pagewanted=all
>

I never heard of hexagonal diamonds, isn't that graphite's crystal
structure?

BK
-- 

""It often seems to me that the night is much more alive and richly colored
than the day."

                      Vincent van Gogh
J Bryan Krämer
North Florida, USA
photos at:
http://pbase.com/photoburner


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