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Related articles:
Hadean
Archean
Phanerozoic
Cambrian
Proterozoic
Ediacaran
Geologic time scale
Canadian Shield
Metamorphic rock
Animal
Wales
Key terms: ma eon era period precambrian earth rocks very older iron forms oxygen around hadean zircon dates formation geologic moon divided appeared boundary giant crust plate fauna roughly impact banded ediacaran diverse western neoproterozoic planetary existence atmosphere corresponds phanerozoic million years supercontinent greenstone belt older north american geology rocks of older north american Search external links cited by footnotes on Wikipedia page Precambrian: |
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