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 305 million years ago

Mean atmospheric O2
 163% of modern level

Mean atmospheric CO2
 3x pre-industrial level

Mean temperature
 Same as modern level


Paleozoic Earth - A giant meganeura dragonfly in a Carboniferous fern forest at sunrise; Mississippian; Pennsylvanian; insects; arthropods - Natural History Illustration Geologic Time Scale

 Era: Paleozoic
  Period: Carboniferous*
   Epoch: Late
    Age: Kasimovian


Meganeura sunrise

A giant flying insect from the genus Meganeura with a 30-inch wingspan, resembling and related to present-day dragonflies, is witness to a sunrise in a Carboniferous fern forest from over 300 million years ago.

*AKA Carboniferous/ Pennsylvanian


Copyright Walter B. Myers. All rights reserved.

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