Pangea now

Plate Tectonics

  • Apr 14, 1527

    Abraham Ortelius

    Abraham Ortelius
    Was born on april 14, 1527. The Pangea Theory- He believes the continents used to fit togather like a puzzle. He died June 28, 1575.
  • Nicolas Steno

    Nicolas Steno
    Nicolas Steno was born in 1636. Nicolas had the theory that each layer of rock is older than the layer above it and younger than the layer below it.
    Published his theory 1666
  • Alfred Wegener presents his theory of continental drift

    Alfred Wegener presents his theory of continental drift
  • James Hutton

    James Hutton
    Erosion tears at mountains, creating sediments that pile up in the ocean, eventually melt, and are uplifted becoming new mountains
  • Arthur Holmes

    Arthur Holmes
    Arthur Holmes that the molten mantle beneath the earth's crust has thermal convection, and when that happens it could cause an upwelling beneath the crust, forcing it to break apart and move.
    Arthur Homles died in 1965.
  • Dan McKenzie

    Dan McKenzie
    In 1942 Dan McKenzie was born. Dan McKenzie wrote an article that showed a mathmatical equation of the mantle that explains the movment of the crust.
  • Harry Hess

    Harry Hess
    The theory was known as “seafloor spreading,” and moves the continents as new ocean crust spreads away. Died in 1969