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 220 million years ago

Mean atmospheric O2
 80% of modern level

Mean atmospheric CO2
 6x pre-industrial level

Mean temperature
 3C above modern level


Mesozoic Earth - Postosuchus on hilltop simplex at water's edge with carrion, cycadale, cycads - Natural History Illustration Geologic Time Scale

 Era: Mesozoic
  Period: Triassic
   Epoch: Late
    Age: Carnian


Postosuchus on hilltop

A 12-foot-long, 1,000 pound rauisuchian archosaur of the genus Postosuchus wanders a hilltop 220 million years ago in what is today Texas. Surrounding the Postosuchus are various cycads, ferns, and tree-like Glossopteridales. With a crocodile-like body and tyrannosaur-like head, Postosuchus was likely a fierce apex predator that preyed upon Dicynodonts and other animals smaller than itself, including some of the first dinosaurs.



Copyright Walter B. Myers. All rights reserved.

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