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13 cards from this deck
200 million years
78%
21%
4.6 billion years ago
Carbon dioxide (CO2CO_2CO2)
Very little or no oxygen
Volcanic activity
Condensed to form oceans
Formed carbonates, settled as sediment
96.5%
95.3%
4.6 billion years ago, few rocks survive
CO2CO_2CO2, H2OH_2OH2O, N2N_2N2, CH4CH_4CH4, NH3NH_3NH3
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