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    Late Pleistocene
    Middle Pleistocene
   Late Cretaceous
   Early Cretaceous
   Late Jurassic
   Middle Jurassic
   Early Jurassic
   Late Triassic
   Middle Triassic
   Early Triassic
   Late Devonian
   Middle Devonian
   Early Devonian
   Late Ordovician
   Middle Ordovician
   Early Ordovician
    Cambrian Stage 10
   Cambrian Series 3
    Cambrian Stage 5
   Cambrian Series 2
    Cambrian Stage 4
    Cambrian Stage 3
    Cambrian Stage 2
  Early Imbrian
  Basin Groups
Hierarchy:Phanerozoic Paleozoic
Classification:Period (as per International Commission on Stratigraphy)
Top:252.17 ± 0.06 Ma
Base:298.9 ± 0.15 Ma
Preceeds:Mesozoic Triassic  Early Triassic   Induan
Follows:Carboniferous Pennsylvanian  Gzhelian
Primary Divisions:LopingianGuadalupianCisuralian
FGDC code:P
Landmasses unite into supercontinent Pangaea, creating the Appalachians.

End of Permo-Carboniferous glaciation.

Synapsid reptiles (pelycosaurs and therapsids) become plentiful, while parareptiles and temnospondyl amphibians remain common. In the mid-Permian, coal-age flora are replaced by cone-bearing gymnosperms (the first true seed plants) and by the first true mosses. Beetles and flies evolve.

Marine life flourishes in warm shallow reefs; productid and spiriferid brachiopods, bivalves, forams, and ammonoids all abundant.

Permian-Triassic extinction event occurs 251 Ma: 95% of life on Earth becomes extinct, including all trilobites, graptolites, and blastoids.

Ouachita and Innuitian orogenies in North America.

Uralian orogeny in Europe/Asia tapers off.

Altaid orogeny in Asia.

Hunter-Bowen Orogeny on Australian continent begins (c. 260–225 Ma), forming the MacDonnell Ranges.

Geologic Events

Event NameTypeAgeArea
Hunter-Bowen orogeny (begins)Orogeny260 - 225 MaAustralia
Mauritanide Belt orogeny (concludes)Orogeny~320 - ~270 MaWest Africa
Uralian orogeny (concludes)Orogeny~320 - ~175 MaRussia
Pangaea assembly (concludes)Continental Assembly335 - 272 MaGlobal
Variscan/Hercynian orogeny (concludes)Orogeny~400 - ~280 MaEurope/North America

Overview of geological time

List all geological events
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