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physical phenomena > event > era > geological era > paleozoic era > cambrian period |
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cambrian period | ||||
subject | fact |
cambrian period | has duration 100 million years | ![]() |
has start time 600 million years ago | ![]() | |
is a kind of paleozoic era | ![]() | |
event | has synonym world point | ![]() |
has time of occurrence | ![]() |