Pennsylvanian Guide, Meaning , Facts, Information and Description
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. 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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