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physical phenomena > event > era > geological era > precambrian era > upper precambrian period |
upper precambrian period comparison table |
Subject | is a kind of | has duration | has start time |
---|---|---|---|
precambrian era | geological era | 2500 million years | 3100 million years ago |
upper precambrian period | precambrian era | million years | million years ago |
Next precambrian era: lower precambrian period Up: precambrian era Previous precambrian era: middle precambrian period