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Pennsylvanian

From Academic Kids

The Pennsylvanian is also an Amtrak train that travels from New York to Pittsburgh.

The Pennsylvanian is a geologic (sub)period lasting from roughly 325 million years before the present (BP) to 286 million years BP. As with most other geologic periods, the rock beds that define the period are well identified, but the exact date of the start and end are uncertain by a few million years.

Generalized geographic map of the  in Middle Pennsylvanian time.
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Generalized geographic map of the United States in Middle Pennsylvanian time.

In North America, where the early Carboniferous beds are primarily marine limestones, it is treated as a full fledged geologic period between the Mississippian and the Permian. In Europe, the Mississippian and Pennsylvanian are one more-or-less continuous sequence of lowland continental deposits and are lumped together as the Carboniferous period.

Refer to the Carboniferous period article for information on faunal stages, climate, etc.

External links

Provides a picture of what the world at the time period.

Information on stratigraphies, localities, tectonics, and life.

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