English: Representation of evolutionary and geological events leading to changes of oxygen content in earth's atmosphere since the formation of the planet.
עברית: תצוגה של המאורעות האבולוציוניים והגיאולוגיים שגרמו לשינויים בתכולת החמצן באטמוספרה של כדור הארץ
Geological events:
A) No oxidized iron found.
B) Oxidized iron bands in seabed rock = evidence for O2 in oceans.
C) Oxidized iron bands on land; ozone layer formation = evidence for O2 in atmosphere.
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2007-04-09 18:37 Tameeria 617×467×8 (25102 bytes) Representation of evolutionary and geological events leading to changes of oxygen content in earth's atmosphere since the formation of the planet. Geological events: *A) No oxidized iron found. *B) Oxidized iron bands in seabed rock = evidence for O<sub>
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{{Information |Description={{en|Representation of evolutionary and geological events leading to changes of oxygen content in earth's atmosphere since the formation of the planet. Geological events: *A) No oxidized iron found. *B) Oxidized iron bands in s