Mesozoic Earth ] Back | Next >

 190 million years ago

Mean atmospheric O2
 130% of modern level

Mean atmospheric CO2
 7x pre-industrial level

Mean temperature
 3C above modern level

Mesozoic Earth - A lone Jurassic Cryolophosaurus amongst Dicroidium and Williamsonia gigas in ancient Antarctica - Natural History Illustration Geologic Time Scale

 Era: Mesozoic
  Period: Jurassic
   Epoch: Early
    Age: Sinemurian



Over 20 feet long and weighing as much as a ton, the theropod genus Cryolophosaurus is the first dinosaur unearthed by paleontologists in Antarctica. This formidable predator hunted 190 million years ago during the Early Jurassic period. 

While the Earth was warmer and Antarctica closer to the equator during Cryolophosaurus' time, the continent was still far enough south for the climate to be temperate rather than tropical. Much of Antarctica was likely covered by dense forests, at least near the coasts. Cryolophosaurus' remains were found on a mountain range that would have placed it at an altitude of about 10,000 feet and 1,000 miles from the South Pole during its reign.



Copyright Walter B. Myers. All rights reserved.

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