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[[File:Min ozone.jpg|thumb|testing]] ...s dominated by the high concentrations of ozone in the [[stratospheric]] [[ozone layer]]. [[File:Dobson, Josiah - Unit- 190th Infantry, Company- I - Enlistm ...

...ed in an anoxic atmosphere since oxygen (and its photochemical product, an ozone layer) would have prevented the photolysis of sulfur dioxide. The process o ...2.4 Ga as a bistability in atmospheric oxygen due to UV shielding by ozone |journal=Geophysical Research Abstracts |volume=8 |page=00770 |url=http://w ...