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physical phenomena > event > era > geological era > paleozoic era > pennsylvanian period
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pennsylvanian period
subjectfact 
pennsylvanian periodhas duration 30 million years2001-09-27 09:29:59.0
has start time 310 million years ago2001-09-27 09:29:59.0
is a kind of paleozoic era2001-09-27 09:29:59.0
eventhas synonym world point2001-09-27 09:29:57.0
has time of occurrence2001-09-27 09:29:57.0