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Period: to
Precambrian
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Atmosphere forms
[stuff](en.wikipedia.org/wiki/Precambrian ) -
Oxygen becomes more prominent
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Oceans form
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Supercontinent Rodinia
stuff The supercontinent Rodinia broke up, splintering into smaller continents. -
Period: to
Paleozoic
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Life evolved and diversified
stuff Life evolved and diversified greatly, in an event called the Cambrian Explosion. Invertebrates and the first shelled animals evolved at this time. -
Abundance of marine invertebrates
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Pangaea begins to split apart
[stuff](en.wikipedia.org/wiki/Mesozoic) Towards the end of the Triassic, Pangaea began to split apart,with Africa slowly moving from the Americas. -
Period: to
Mesozoic
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Period: to
Cenozoic
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