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physical phenomena > event > era > geological era > paleozoic era |
paleozoic era comparison table |
Subject | has duration | has start time |
---|---|---|
cambrian period | 100 million years | 600 million years ago |
devonian period | 60 million years | 405 million years ago |
mississippian period | 35 million years | 345 million years ago |
ordovician period | 75 million years | 500 million years ago |
pennsylvanian period | 30 million years | 310 million years ago |
permian period | 50 million years | 280 million years ago |
silurian period | 20 million years | 425 million years ago |
Next geological era: precambrian era Up: geological era Previous geological era: mesozoic era