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Measuring Oxygen Content of the Ancient Earth

by Drakkith
Tags: ancient, content, earth, measuring, oxygen
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Apr16-14, 01:49 AM
Drakkith's Avatar
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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.

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Apr16-14, 02:21 AM
Borek's Avatar
P: 23,719
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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