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Apr 14, 1527
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 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
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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 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
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
The theory was known as “seafloor spreading,” and moves the continents as new ocean crust spreads away. Died in 1969
