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Great Oxidation Event - Coggle Diagram
Great Oxidation Event
Prior to 2450MYa
Oxygen is a trace element in the Atmosphere
Significant methane in the atmosphere
Very reactive with oxygen
High ratio of S33
Little continental land mass
No substantial Plant life
Fire unsustainalbe with low oxygen
No charcoal in fossil record
No Oxone Layer
Significant penetration of UV light through atmosphere
Light induced reactions with sulphides andf sulphates
Between 2450 and 2200Mya
The presene of atmospheric oxygen is rapidly growing
Continental Land Masses Growing
Lowering S33 ratio
Ozone Layer Beginning to form
2200Mya to present day
Oxygen is a substantial component of the atmosphere
Fire sustainable
Charcoal in fossil records
Low S33 ratio
Ozone layer inhibits UV radiation from reacting with Sulphides and Sulphates