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Pennsylvanian

Hierarchy:Phanerozoic Paleozoic  Carboniferous
   Pennsylvanian
Classification:Epoch (as per International Commission on Stratigraphy)
Top:298.9 ± 0.15 Ma
Base:323.2 ± 0.4 Ma
Preceeds:Permian Cisuralian  Asselian
Follows:Mississippian Serpukhovian
Primary Divisions:GzhelianKasimovianMoscovianBashkirian
FGDC code:*
Winged insects radiate suddenly; some (esp. Protodonata and Palaeodictyoptera) are quite large. Amphibians common and diverse. First reptiles and coal forests (scale trees, ferns, club trees, giant horsetails, Cordaites, etc.). Highest-ever atmospheric oxygen levels.Goniatites, brachiopods, bryozoa, bivalves, and corals plentiful in the seas and oceans. Testate forams proliferate. Uralian orogeny in Europe and Asia. Variscan orogeny occurs towards middle and late Mississippian Periods.
 

Geologic Events

Event NameTypeAgeArea
Mauritanide Belt orogeny (concludes)Orogeny~320 - ~270 MaWest Africa
Uralian orogeny (concludes)Orogeny~320 - ~175 MaRussia
Pangaea assembly (ongoing)Continental Assembly335 - 272 MaGlobal
Variscan/Hercynian orogeny (concludes)Orogeny~400 - ~280 MaEurope/North America


Overview of geological time

List all geological events
Mineral and/or Locality  
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