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 Western Europe
 285 million years ago

Mean atmospheric O2
 115% of modern level

Mean atmospheric CO2
 3x pre-industrial level

Mean temperature
 2C above modern level


Paleozoic Earth - Archegosaurus in a Permian swamp 285 years ago in what is today Germany; Archegosauridae; Ruprechtice assemblage - Natural History Illustration

Geologic Time Scale

 Era: Paleozoic
  Period: Permian
   Epoch: Cisuralian
    Age: Artinskian



Ten-foot-long temnospondyl amphibians of the genus Archegosaurus lounge in an Early Permian swamp 285 million years ago in what is today Western Europe. Also in this image are several varieties of fern including tree-like seed ferns of the genus Alethopteris.

Archegosaurus was a large, crocodile-like carnivore that likely fed upon fish and perhaps other amphibians.



Copyright Walter B. Myers. All rights reserved.

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