Gray Fossil Site Museum

Ref: Gray Fossil Site (2026). Gray, TN.

___________________________________________________________________________

Chronology

  • 65 Ma- Present: Cenozoic Era (Gray Fossil Site Museum).

    • 200-100 Ka: Modern humans first evolve (Gray Fossil Site Museum).

    • 500-12 Ka: Life of the giant short-faced bear (Arctodus simus), the largest bear to ever exist in North America. However, as big as this bear was, it was still smaller than the largest bear, Arctotherium angustidens, which lived in South America (Gray Fossil Site Museum).

    • 7-4.5 Ma: Gray’s Fossil Site (Modern TN) is active (Gray Fossil Site Museum).

  • 252 Ma-65 Ma: Mesozoic Era (Gray Fossil Site Museum).

    • 65 Ma: Non-avian dinosaurs go extinct (Gray Fossil Site Museum).

    • 150 Ma: The first birds evolve (Gray Fossil Site Museum).

    • 210 Ma: The first mammals evolve (Gray Fossil Site Museum).

    • 230 Ma: The first dinosaurs evolve (Gray Fossil Site Museum).

  • 543 Ma-252 Ma: Paleozoic Era (Gray’s Fossil Site Museum).

    • 335 Ma: The first reptiles evolve (Gray Fossil Site Museum).

    • 365 Ma: The first amphibians evolve (Gray Fossil Site Museum).

    • 405 Ma: The first true insects evolve (Gray Fossil Site Museum).

    • 460-425 Ma: The first land plants evolve (Gray Fossil Site Museum).

    • 505 Ma: The first fishes evolve (Gray Fossil Site Museum).

  • 3.8 Ga: The first single-celled organisms evolve (Gray Fossil Site Museum).

  • 4.6 Ga: The Earth forms (Gray Fossil Site Museum).

___________________________________________________________________________