Well, can aggree. At least the abstract doesn�t say anything about the high Ir in the
K/T-boundry. Don�t know the background of these scientists, but it might be more
from (mare) chemistry than from geology. Just my 2 cents...;-
http://www.icdp-online.de/sites/chicxulub/ICDP-Chix/CHIC-ICDP_KTB-PAGE.html
http://www.icdp-online.de/sites/chicxulub/news/news.html
take care,
pekka s
Charles Viau wrote:
"It wasn't the gun that killed him, it was the bullet that went through his heart.."
What part of the study explained how such a flourishing ecosystem suddenly went so wrong. So many young scientists making headline news by concentrating on secondary concequences...
CharlyV
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Paul Sent: Wednesday, December 10, 2003 1:48 PM To: [EMAIL PROTECTED] Subject: [meteorite-list] Permian-Triassic Extinction Not Impact Related
A recently published paper argues that the
Permian-Triassic extinction was not caused by an asteroid or comet impact. The paper is:
E. Heydari and J. Hassanzadeh. 2003, Deev Jahi Model of the Permian-Triassic boundary mass extinction: a case for gas hydrates as the main cause of biological crisis on Earth. vol. 163, no.1-2, pp. 147-163 (15 December 2003)
The abstract concluded:
"The study suggests that prior to cement precipitation, the PTB ocean was charged with CO2, warm, had low oxygen, high Ca2+, and high HCO3- concentrations. These conditions collectively created stressful conditions causing the marine mass mortality. The leakage of CH4 to the atmosphere produced a super-hot climate resulting in the biological devastation on land. The proposed kill mechanism is developed on the basis of the physical clue--the cement layer--left behind by the killing process--the change in ocean chemistry."
Yours,
Paul Baton Rouge, LA
__________________________________ Do you Yahoo!? Free Pop-Up Blocker - Get it now http://companion.yahoo.com/
______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
--
Pekka Savolainen Jokiharjuntie 4 FIN-71330 Rasala FINLAND
+ 358 400 818 912
Group Home Page: http://www.smartgroups.com/groups/eurocoin Group Email Address: [EMAIL PROTECTED]
______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
