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 Wyoming, USA
 70 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 - Horned Nedoceratops (FKA Diceratops) graze with Avisaurus beneath a massive Oak tree; ceratopsid dinosaur- Natural History Illustration Geologic Time Scale

 Era: Mesozoic
  Period: Cretaceous
   Epoch: Late
    Age: Maastrichtian


Nedoceratops under an Oak tree

Ceratopsid dinosaurs of the genus Nedoceratops (formerly known as Diceratops) graze beneath a giant tree of the genus Quercus (AKA Oak) 70 million years ago in what is today Wyoming. The ground birds on the right are from the predatory genus Avisaurus.

About the same size and weight of the three-horned Triceratops, Nedoceratops had only two prominent horns and a rounded stump where the nasal horn would be.

Oak trees emerged about 80 million years ago during the Late Cretaceous period.




Copyright Walter B. Myers. All rights reserved.

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