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physical phenomena > event > era > geological era > paleozoic era > permian period |
permian period comparison table |
Subject | is a kind of | has duration | has start time |
---|---|---|---|
paleozoic era | geological era | 370 million years | 600 million years ago |
permian period | paleozoic era | 50 million years | 280 million years ago |
Next paleozoic era: silurian period Up: paleozoic era Previous paleozoic era: pennsylvanian period