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physical phenomena > event > era > geological era > cenozoic era > tertiary period > oligocene epoch
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oligocene epoch
subjectfact 
oligocene epochhas duration 11 million years2001-09-27 09:29:59.0
has start time 36 million years ago2001-09-27 09:29:59.0
is a kind of tertiary period2001-09-27 09:29:59.0
eventhas synonym world point2001-09-27 09:29:57.0
has time of occurrence2001-09-27 09:29:57.0