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 130 million years ago

Mean atmospheric O2
 150% of modern level

Mean atmospheric CO2
 6x pre-industrial level

Mean temperature
 4C above modern level

Mesozoic Earth - An Early Cretaceous Psittacosaurus next to a desert scrubland pond 130 million years ago in what is today central Asia - Natural History Illustration Geologic Time Scale

 Era: Mesozoic
  Period: Cretaceous
   Epoch: Early
    Age: Barremian


Psittacosaurus and pond

An Early Cretaceous psittacosaurid ceratopsian dinosaur of the genus Psittacosaurus prepares to dine on a scrubland cycad 130 million years ago in what is today central Asia.

Psittacosaurus was one of the earliest known ceratopsians, a family of horned, frilled dinosaurs that includes the better known Triceratops. Psittacosaurus was about 3 to 6 feet long and weighed 50 to 175 pounds, depending on species. At least one species had long, quill-like structures on its tail and lower back. With a parrot-like beak it is believed that Psittacosaurus was a plant-eater.



Copyright Walter B. Myers. All rights reserved.

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