See Also: Pennsylvanian Period(encyclopedia)
Pennsylvanian(dictionary)
Time period principle or accounting period assumption(finance)
T-period holding-period return(finance)
T-period holding-period return(money)
Period certain(finance)
period(encyclopedia)
Net period(money)
period(2)(dictionary)
Period(medicine)

Pennsylvanian Period (sh)




In North America, the interval of geologic time roughly equivalent to what is internationally designated the Late Carboniferous Period (323-290 million years ago).

Because the rocks that originated during this span of time are widespread in the state of Pennsylvania, some U.S. geologists favour the term over Late Carboniferous Period, which was first adopted in Europe.