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 228 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 - Pterosaurs amidst Bjuvia simplex AKA Paleocycas at water's edge with carrion, cycadale, cycads - Natural History Illustration Geologic Time Scale

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


Pterosaurs amidst Bjuvia

A pterosaur alights near the bank of a shallow pond, attracted by the prospect of a dinner of carrion 228 million years ago.

Earth's open and sunny plains were once home to cycads of the genus Bjuvia. Bjuvia, a cone-bearing seed plant, resembled modern palms, however they were more closely related to pines. Adult Bjuvia grew to a height of 25 feet and became extinct about 210 million years ago during the Late Triassic period.

Also during this time the skies were home to a flying variety of reptiles known as pterosaurs. While pterosaurs' reptilian origins appear clear, they were not related to birds, and it isn't certain whether they were even related to dinosaurs. There were many varieties of pterosaur during their reign of 160 million years, becoming extinct, along with most of the dinosaurs, about 65 million years ago.



Copyright Walter B. Myers. All rights reserved.

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