Colorado Rockies Timeline

By 2069523

  • Cenozoic (Paleogene)

    Paleogene
    Time frame: 65.5 million years ago
    Length: 42.47 million years

  • Cenozoic (Quaternary)

    Time Frame: 2.59 million years ago to present. Length: 2.59 million years

  • Mesozoic (Jurassic)

    Time frame: 199.6 million years ago to 145.5 million years ago
    Length: 54.1 million years.

  • Mesozoic (Triassic)

    Length: