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WikiCards · Card list · History cards · Great Oxidation Event
Uncommon card · History
Great Oxidation Event, an Uncommon card
The Great Oxidation Event or Great Oxygenation Event, also called the Oxygen Catastrophe, Oxygen Revolution, Oxygen Crisis, or Oxygen Holocaust, was a time interval during the Earth's Paleoproterozoic era when the Earth's atmosphere and shallow seas first experienced a rise in the concentration of free oxygen.
- Rarity
- Uncommon
- Domain
- History
- ATK
- 84
- DEF
- 89
- Power
- 173
- Wikipedia reads a year
- 200,000
Ranked #980 of the 3,000 cards of the base set by power (ATK + DEF).
The facts on the card
The card carries these facts from its Wikipedia article.
- This began approximately 2.46–2.426 billion years ago during the Siderian period and ended around 2.06 billion years ago during the Rhyacian.
- Geological, isotopic, and chemical evidence suggests that biologically produced molecular oxygen started to accumulate in the Archean prebiotic atmosphere by microbial photosynthesis.
- It changed the atmosphere from a weakly reducing state practically devoid of oxygen into an oxidizing one containing abundant free oxygen, with oxygen levels being as high as 10% of the modern atmospheric level by the end of the GOE.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Great Oxidation Event article was read about 200,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 84 and blocks with 89: each hit it takes is cut by 36 %.
How to get Great Oxidation Event
Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.
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- KrillRare · Nature · ATK 80 DEF 93
- LettuceUncommon · Nature · ATK 78 DEF 95
- The artsUncommon · Science · ATK 79 DEF 94
Card lists
- All cards from A to ZEvery card, by name
- Nature cards600 cards
- Science cards600 cards
- History cards600 cards
- Arts cards600 cards
- Society cards600 cards
- Tier listS and A tiers by power (ATK + DEF)
- Legendary cards136 cards
- Epic cards262 cards
- Strongest cardsTop 100 by attack
Credits
Text : Wikipedia, Great Oxidation Event (revision), CC BY-SA 4.0. Photo : Sciencia58, CC0, Wikimedia Commons.
