Virgilian series
From Wikipedia, the free encyclopedia
The Virgilian series is the youngest part of the Pennsylvanian epoch in the North American geologic classification series.[1] During Virgilian times, the top of the Conemaugh and the entire Monongahela group were deposited.[2] As with other Carboniferous series, it comprises cyclothems, or distinct cycles of sedimentary rock formation.
Monongahela cyclothems (youngest at top)
- Note: the names below are of the Conemaugh age, not Monongahela age
- Upper Little Pittsburgh
- Lower Little Pittsburgh
- Little Clarksburgh
- Elk Lick
- Duquesne
- Gaysport
- Ames
- Harlem
- Upper Bakerstown
- Anderson
- Wilgus
- Upper Brush Creek
- Lower Brush Creek
- Mason
- Mahoning
