1. Pennsylvanian - Noun
2. Pennsylvanian - Adjective
a native or resident of Pennsylvania
from 310 million to 280 million years ago; warm climate; swampy land
Source: WordNetThe current internationally used geologic timescale of the ICS gives the Mississippian and Pennsylvanian the rank of subperiods, subdivisions of the Carboniferous Period. Source: Internet
The entire area is a dissected plateau of Pennsylvanian and Mississippian age, but appears mountainous to the casual observer. Source: Internet
A more recent chaetognath, Paucijaculum samamithion Schram, has been described from the Mazon Creek biota from the Pennsylvanian of Illinois. Source: Internet
As with most other geochronologic units, the rock beds that define the Pennsylvanian are well identified, but the exact date of the start and end are uncertain by a few million years. Source: Internet
Fungi All modern classes of fungi have been found in rocks of Pennsylvanian age. Source: Internet
Most of the oil and gas of North America is obtained from Pennsylvanian sediments. Source: Internet