Is it feasible to have an oxidizing planetary atmosphere without the presence of an organic photosynthesis of some kind on the planet?
With the emergence of cyanobacteria on earth 3.5 billion years ago, the shift from a reducing to an oxidizing atmosphere began.
"The atmospheric O
Would a non-organic based and/or non-photosynthetic derived oxidizing atmosphere be feasible on a planetary scale?
If so, given that the earth's oxidizing atmosphere is derived from the sun's thermonuclear energy over billions of years, what would be the ultimate source of energy for such a non-organic based and/or non-photosynthetic derived oxidizing atmosphere?
 [1] Tajika, Eiichi, and Mariko Harada. "Great Oxidation Event and Snowball Earth." Astrobiology, 28 Feb. 2019, pp. 261"“271, https://link.springer.com/chapter/10.1007%2F978-981-13-3639-3_17.
This post was sourced from https://worldbuilding.stackexchange.com/q/177034. It is licensed under CC BY-SA 4.0.
0 comment threads