Pennsylvanian Subperiod: Quick Facts

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A chart detailing the Carboniferous period within the Paleozoic era, showing its division into Mississippian and Pennsylvanian subperiods, with corresponding epochs, ages, and their ranges in millions of years ago.

A detailed geologic time scale chart displaying Earth's history from the Hadean Eon over 4.5 billion years ago to the present, organized by eons, eras, periods, epochs, and ages with color-coded columns and corresponding dates in millions of years.

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fossil Cordaites Edaphosaurus Mesosaurus Gastrioceras Ouachita orogeny Marathon orogeny Wichita orogeny Wedekindellina Nuculopsis Mississippian Subperiod Karoo System