Talk:Cambrian–Ordovician extinction event: Difference between revisions

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First?

I think the Oxygen Catastrophe must have been the first extinction event--Robert van der Hoff 09:25, 9 May 2007 (UTC)[reply]

Of course it was before the Cambrina-Ordovician period--Robert van der Hoff 09:27, 9 May 2007 (UTC)[reply]

Plus there is the end Ediacaran extinction, and possibly another one at 650Ma which affected about 3/4 of marine life, mainly stromatolites and acritarchs

Maybe the oxygen catastrophe wasn’t the earliest extinction ive even heard some scientists say (such as here) that life formed more than once on earth and went completely extinct several times before life became firmly established on earth.--Fang 23 (talk) 19:54, 13 December 2007 (UTC) The Cambrian Ordovician (487Ma-ago) cooling predates Maastrichtian cooling 70Ma-ago by 417Ma. Perhaps Miller could compare these two cooling stages. Early Maastrichtian 'δ18O results suggest accelerated cooling, resulting in the lowest marine temperatures of the Late Cretaceous.'. Ordovician-Cambrian Miller coolng hypothesis. That these are 417Ma, as well as three other period pairs are 417Ma separated are found in user User:Morbas:Geologic Physical Driver.Morbas (talk) 19:50, 27 February 2014 (UTC)[reply]

Revision as of 06:03, 1 June 2013 edit BattyBot (talk \| contribs) Bots 1,923,747 edits m Talk page general fixes & other cleanup using AWB ← Previous edit		Revision as of 19:50, 27 February 2014 edit undo Morbas (talk \| contribs) Extended confirmed users 1,203 edits →First?: Coorelation suggestion for Miller. Next edit →
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	Maybe the oxygen catastrophe wasn’t the earliest extinction ive even heard some scientists say (such as [http://64.233.169.104/search?q=cache:A8p0bLb_cLsJ:www.socialismtoday.org/105/dawkins.html+Did+life+begin+and+go+completely+extinct+more+than+once+on+earth%3F--&hl=en&ct=clnk&cd=4&gl=us here]) that life formed more than once on earth and went completely extinct several times before life became firmly established on earth.--[[User:Fang 23\|Fang 23]] ([[User talk:Fang 23\|talk]]) 19:54, 13 December 2007 (UTC)		Maybe the oxygen catastrophe wasn’t the earliest extinction ive even heard some scientists say (such as [http://64.233.169.104/search?q=cache:A8p0bLb_cLsJ:www.socialismtoday.org/105/dawkins.html+Did+life+begin+and+go+completely+extinct+more+than+once+on+earth%3F--&hl=en&ct=clnk&cd=4&gl=us here]) that life formed more than once on earth and went completely extinct several times before life became firmly established on earth.--[[User:Fang 23\|Fang 23]] ([[User talk:Fang 23\|talk]]) 19:54, 13 December 2007 (UTC)
			The Cambrian Ordovician (487Ma-ago) cooling predates Maastrichtian cooling 70Ma-ago by 417Ma. Perhaps Miller could compare these two cooling stages. Early Maastrichtian 'δ18O results suggest accelerated cooling, resulting in the lowest marine temperatures of the Late Cretaceous.'. Ordovician-Cambrian Miller coolng hypothesis. That these are 417Ma, as well as three other period pairs are 417Ma separated are found in user [[User:Morbas:Geologic Physical Driver]].[[User:Morbas\|Morbas]] ([[User talk:Morbas\|talk]]) 19:50, 27 February 2014 (UTC)