Pennsylvanian Summary

Everything you need to understand or teach Pennsylvanian.

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1 Encyclopedia Article

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Pennsylvanian Period

522 words, approx. 2 pages

Pennsylvanian Period The Pennsylvanian Period lasted from 320 to 286 million years ago. During the Pennsylvanian Period, widespread swamps laid down the thick beds of dead plant material that today co... Read more

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