PDA

View Full Version : Earth Had Oxygen Earlier Than Believed



Fraser
2007-Oct-02, 09:29 PM
Take a nice deep breath, fill your lungs with oxygen. You can thank the plants for that. Scientists had originally found that oxygen showed up in the Earth's atmosphere around 2.3-2.4 billion years ago; in a period called the "Great Oxidation Event". ...

Read the full blog entry (http://www.universetoday.com/2007/10/02/earth-had-oxygen-earlier-than-believed/)

Josh
2007-Oct-03, 03:04 AM
Wouldn't 50-100 million years be within the margin of error over 2.3-2.4 billion years?

jlhredshift
2007-Oct-03, 12:33 PM
Wouldn't 50-100 million years be within the margin of error over 2.3-2.4 billion years?

As to the absolute dating, yes. But they found indications of a rise in oxygen prior to the spike of the "GreatOxidationEvent".


Their goal was to characterize the nature of the environment and life in the oceans leading up to the Great Oxidation Event. But they were not expecting much from this particular stretch of core.

“We expected these analyses to be boring,”

Jerry
2007-Oct-03, 03:12 PM
Nobody ever expects their research project to be boring. Everyone hopes their project will unmask a 'first'.Take this with grains of salt, as always.

In any case, should we expect earlier oxygenation down under?

Ronald Brak
2007-Oct-03, 03:43 PM
In any case, should we expect earlier oxygenation down under?

My guess is it wouldn't be localized, and besides, down under was up over back then.