The Pennsylvanian is an epoch of the Carboniferous period lasting from roughly 325 Ma to 286 Ma (million years ago). 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. The Pennsylvanian is named after the state of Pennsylvania where rocks from this age are widespread.

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.

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7/24/1824 1st opinion poll published by the The Harrisburg Pennsylvanian newspaper showing Andrew Jackson with a clear lead. He won. :-p
Girl78anna (Anna Girl) Sat, 07 Nov 2009 04:24:29 -0000
7/24/1824 1st opinion poll published by the The Harrisburg Pennsylvanian newspaper showing Andrew Jackson with a clear lead. He won. :-p
@MatthewHLeach Though I was the one responsible for the annual "Bring Back Hockey" column two straight years at the Daily Pennsylvanian.
jessespector (Jesse Spector) Fri, 06 Nov 2009 23:37:50 -0000
@MatthewHLeach Though I was the one responsible for the annual "Bring Back Hockey" column two straight years at the Daily Pennsylvanian.
very funny! RT @kevindewalt How to talk Pennsylvanian http://bit.ly/c0Wmu
suegoodhart (Sue Goodhart) Fri, 06 Nov 2009 21:58:32 -0000
very funny! RT @kevindewalt How to talk Pennsylvanian http://bit.ly/c0Wmu
7/24/1824 1st opinion poll published by the The Harrisburg Pennsylvanian newspaper showing Andrew Jackson with a clear lead. He won. now
TinkerbellM9191 (Marie Tinkerbell) Fri, 06 Nov 2009 21:41:23 -0000
7/24/1824 1st opinion poll published by the The Harrisburg Pennsylvanian newspaper showing Andrew Jackson with a clear lead. He won. now
Whoa just passed a very hostile Pennsylvanian who flip us off wtf!
kaciecuse (Kacie Loren Leonard) Fri, 06 Nov 2009 17:35:38 -0000
Whoa just passed a very hostile Pennsylvanian who flip us off wtf!
A good read: Wharton prof explores dual identities | The Daily Pennsylvanian - http://shar.es/aAPT9
albarraza (Al Barraza) Fri, 06 Nov 2009 17:30:43 -0000
A good read: Wharton prof explores dual identities | The Daily Pennsylvanian - http://shar.es/aAPT9

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