The Early Pennsylvanian (also known as the Lower Pennsylvanian) is the first of three subepochs of the Pennsylvanian epoch of the Carboniferous period. It spans the time between 318.1 ± 1.3 Ma and 311.7 ± 1.1 Ma (million years ago). It has one faunal stage, the Bashkirian. The word epoch can mean either an interval of time, or a particular point in time used as a reference point. ... Jump to: navigation, search 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... Jump to: navigation, search The geologic time scale is used by geologists and other scientists to describe the timing and relationships between events that have occurred during the history of the Earth. ... Jump to: navigation, search The Carboniferous is a major division of the geologic timescale that extends from the end of the Devonian period, about 359. ... Jump to: navigation, search The geologic time scale is used by geologists and other scientists to describe the timing and relationships between events that have occurred during the history of the Earth. ... Mega-annum, usually abbreviated as Ma, is a unit of time equal to one million years. ... Faunal stages are a subdivision of geologic time used primarily by paleontologists who study fossils rather than by geologists who study rock formations. ... Jump to: navigation, search This article needs to be cleaned up to conform to a higher standard of quality. ...

References

• GeoWhen Database - Early Pennsylvanian