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The Pennsylvanian Period was from about 325 million to 280 million years ago. It is part of the Paleozoic Era. The Pennsylvanian and the Mississippian (345 to 325 MYA) are often grouped together as the Carboniferous Period.

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17y ago
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15y ago

34 million years.

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Q: How long did the pennsylvanian period last?
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Related questions

Period during which source of great coal deposits in West Virginia Pennsylvania Ohio and Illinois existed?

pennsylvanian period


When did the Pennsylvanian period start?

I have no clue.


What was the dominant reptile in the Pennsylvanian period?

bicth


What separates the Mississippian period from the Pennsylvanian period?

The Carboniferous Period has been divided into the Lower Carboniferous (Mississippian) and the Upper Carboniferous (Pennsylvanian) based on the differing stratigraphy found on different continents. The Mississippian has a stratigraphy that was mostly limestone, and most coal-bearing deposits (not all) were found in the Pennsylvanian.


What is the Mississippian and Pennsylvanian periods grouped together?

The Carboniferous Period


When did cockroaches first appear?

Actually they were from the Pennsylvanian Period and the Paleozoic Era...


What lived during the Pennsylvanian Period?

There are several things that lived during the Pennsylvanian Period. Giant water scorpions, eels, crocodiles, newts, salamanders, and many other things lived during this time.


Did dinosaurs roam the lands during the pennsylvanian period?

No. the first Dinosaurs were in the Triassic period, which came later


During what period did the insects first appear?

Silurian Period 408 - 438 Million Years Ago


What was volcanic activity like in the Pennsylvanian time period?

During the Pennsylvanian time period, there was a lot of volcanic activity and these constituted a lot of rock formation. Volcanic ashes also settled on the earth's surface and buried some trees.


What happened to the organic remains if the vast swamp forests of the pennsylvanian period?

It turned in to coal.


The first fossils of land plants and animals are found in rocks from the?

Cambrian Period Actually the correct answer to this question is the "Pennsylvanian Period".