Mesozoic Era Facts

The Mesozoic era is made up of the Triassic, Jurassic, and Cretaceous periods. It began around 252 million years ago and ended about 66 million yeas ago:

  • Triassic: 252 to 201 million years ago
  • Jurassic: 200 to 145 million years ago
  • Cretaceous: 145 to 100 million years ago