• Corpus ID: 126835300

When did the Earth's atmosphere become oxic? A Reply

@inproceedings{Holland1999WhenDT,
  title={When did the Earth's atmosphere become oxic? A Reply},
  author={Heinrich Dick Holland},
  year={1999}
}
In the fall 1997 issue of The Geochemical News, H. Ohmoto (1) outlined two very different views regarding the evolution of atmospheric oxygen: the Cloud-Walker-Kasting-Holland (C –W-K-H) model and the Dimroth-Kimberley-Ohmoto (D-KO) model. The first maintains that oxygen was absent or very low in the atmosphere prior to ca. 2.3 Ga, and that pO2 rose rapidly to values = 0.03 atm during the Great Oxidation Event (G.O.E.) between ca. 2.25 and ca. 2.05 Ga. The second model postulates an essentially… 

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