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New Evidence Suggests Early Oceans Bereft of Oxygen for Eons
NewsWise ^ | 3/4/04

Posted on 03/07/2004 3:45:13 PM PST by LibWhacker

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1 posted on 03/07/2004 3:45:14 PM PST by LibWhacker
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To: PatrickHenry
Ancient anoxic oceans ping!
2 posted on 03/07/2004 3:48:45 PM PST by VadeRetro
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To: LibWhacker
Umm... I thought O2 was a poisonous waste for early life.
3 posted on 03/07/2004 3:57:18 PM PST by BikePacker
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To: LibWhacker
Kerry's brain is in a similar state as I type.
4 posted on 03/07/2004 3:59:48 PM PST by Atchafalaya
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To: VadeRetro
Once, pO2 increased, some of the critters' metabolism
could be used to make collagen (bones, skin, tendons; and then leave fossils).
5 posted on 03/07/2004 4:00:20 PM PST by Diogenesis (If you mess with one of us, you mess with all of us)
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To: BikePacker
Me, too . . . For very early life, that is. For nascent life. After it's established, though, you apparently need it to evolve higher forms. Thus, life arose early when O2 levels were low, then not much happened ito evolution until oxygen went through the roof.
6 posted on 03/07/2004 4:04:12 PM PST by LibWhacker
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To: Diogenesis
Yes. After a time there was a certain amount of oxygen-producing photosynthesis going on, but oxygen levels couldn't rise much until the surface iron ores were fully oxidized, etc.
7 posted on 03/07/2004 4:11:33 PM PST by VadeRetro
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To: *crevo_list; VadeRetro; jennyp; Junior; longshadow; RadioAstronomer; Physicist; LogicWings; ...
Oceanic PING. [This ping list is for the evolution side of evolution threads, and sometimes for other science topics. FReepmail me to be added or dropped.]
8 posted on 03/07/2004 4:21:51 PM PST by PatrickHenry (A compassionate evolutionist.)
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To: LibWhacker
"The scientists plan to continue studying molybdenum chemistry to answer that question, with continuing support from NSF and NASA, the agencies that supported the initial work."

So, whether there's any relevance to their theories or not, they WILL be getting funding from you and me.

Nice work if you can get it.

9 posted on 03/07/2004 4:30:40 PM PST by nightdriver
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To: PatrickHenry
The element molybdenum enters the oceans through river runoff, dissolves in seawater, and can stay dissolved for hundreds of thousands of years. By staying in solution so long, molybdenum mixes well throughout the oceans, making it an excellent global indicator. It is then removed from the oceans into two kinds of sediments on the seafloor: oxygen-rich and those that are oxygen-poor.

Thanks Patrick. This is very interesting.

10 posted on 03/07/2004 4:41:12 PM PST by Victoria Delsoul (The Passion is true to the Gospel, those who claim to know it and disagree...simply don't understand)
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To: nightdriver
So, whether there's any relevance to their theories or not, they WILL be getting funding from you and me.

Nice work if you can get it.

Nightdriver, have you checked with your moma to see if she smoked while she was pregnant with you?
11 posted on 03/07/2004 4:42:28 PM PST by LaMudBug
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To: VadeRetro
Here's a website about life in such an environment: Life in anoxic worlds. There could have been lots of anoxic life in the early oceans. Gone now. Poisoned by oxygen. Our kind of life has adapted to what may be regarded as a toxic environment.
12 posted on 03/07/2004 4:58:31 PM PST by PatrickHenry (A compassionate evolutionist.)
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To: PatrickHenry
Very nice! Had to go back and read the first two pages as well.
13 posted on 03/07/2004 5:20:23 PM PST by VadeRetro
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To: LaMudBug
"Nightdriver, have you checked with your moma to see if she smoked while she was pregnant with you?"

Hey, Looziana crawdad, I can come up with evolution theories that are a lot wilder than this one.

Now if I could just get you to pay me to investigate them! (?)

14 posted on 03/07/2004 5:48:54 PM PST by nightdriver
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To: VadeRetro
Karen Carpenter Ping!

Another Ancient anorexic ping!

Well, she's not using any oxygen now is she!?
15 posted on 03/07/2004 5:55:02 PM PST by tet68 ( " We would not die in that man's company, that fears his fellowship to die with us...." Henry V.)
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To: tet68
Kinda miss her. Never play any of her music, but she had a wonderful rich voice which might have been better used.
16 posted on 03/07/2004 5:59:06 PM PST by VadeRetro
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To: VadeRetro
you mean as in on key?
17 posted on 03/07/2004 6:06:12 PM PST by js1138
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To: js1138
Pulling her out of that stupid echo chamber her brother Richard had them in most of the time would have done it.
18 posted on 03/07/2004 6:09:06 PM PST by VadeRetro
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To: PatrickHenry
Thanks for the ping!
19 posted on 03/07/2004 8:07:41 PM PST by Alamo-Girl
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To: LibWhacker
Evolution didn't really get started until organisms learned to pronounce "molybdenum".
20 posted on 03/08/2004 1:11:45 AM PST by jennyp (http://crevo.bestmessageboard.com)
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