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Measuring Oxygen Content of the Ancient Earth

by Drakkith
Tags: ancient, content, earth, measuring, oxygen
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Drakkith
#1
Apr16-14, 01:49 AM
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I read that the level of oxygen in the atmosphere reached its highest concentration during the Carboniferous period, with over 32% of the atmosphere by volume as O2. I was wondering, how is this measured?

The reference on wiki only links to a graph with no other content.

Thanks.
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Borek
#2
Apr16-14, 02:21 AM
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Composition of some precipitates depends on the partial pressure of oxygen, so you can determine the partial pressure by examining deposits.

I also seem to remember in some cases we were able to find trapped bubbles of original atmosphere.


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