The Oxygen Cycle continued....

The text identifies 3 dominant reservoirs of oxygen in the Earth system (in figure 10.9): the atmosphere, the biosphere, and sediments.

The text's thesis maintains:

Free oxygen in the atmosphere is generated by the burial of organic carbon in sediments, primarily in the oceans. (buried as C-O, in atmosphere as C-O2)

The balance between the production and removal of oxygen is therefore controlled by biological and  geologic processes involving the cycling of carbon compounds through the oceans and the lithosphere.

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