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Plate Tectonics Timeline By: Steven Wheeler 1st Period Gray

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Steven Wheeler

on 29 January 2014

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Transcript of Plate Tectonics Timeline By: Steven Wheeler 1st Period Gray

Plate Tectonics Timeline
Steven Wheeler 1st Period Gray

1596
Abraham Ortelius
1929
Arthur Holmes
In 1929, Arthur Holmes came up with the theory of Convection Currents. He claimed that the molten material in the mantle moved in a circular motion. He explains more about what happens and calls these Convection Currents. This is what he says took part in the continental drift.
This impacted the theory of plate tectonics because it helped get the Continental Drift theory accepted by more people.
1959
Harry Hess
Harry Hess came up with the theory of Sea Floor Spreading in 1959. This theory stated that the sea floor is moving away from a central point, causing the continents to move with it.
This theory was also a big impact to plate tectonics because it lead to scientists finally figuring out what happened.
1912
Alfred Lothar Wegenar
In 1912, Alfred Lothar Wegenar came up with the theory of Continental Drift. The theory stated that the continents were once together, but drifted away. He called the giant landmass of continents Pangaea.
This impacts the theory of plate tectonics because the theory of plate tectonics is half based off of this theory.
In 1596, Abraham Ortelius came up with the theory that North and South America were once connected to Eurasia and Africa, but have drifted apart from flooding and earthquakes. This impacted the theory of plate tectonics because this was what the whole theory of plate tectonics was based off of.
1962
Frederick John Vine
Him, Marley, and Matthew came up with the theory that the sea floor was spreading equally away away from the mid-ocean ridge. Also, they came up with the theory that Earth's magnetic poles have shifted from North to South and back agan several times in 1962.
This impacts the theory of plate tectonics because they expanded the sea floor spreading theory. By expanding it, so many new things can be thought of.
1968
The Glomar Challenger
The Glomar Challenger was a drilling ship that set out across the Atlantic Ocean from South America towards Africa in 1968. It was used to drill rocks from the ocean floor so scientists could determine the age of the rocks. After they did everything they did, it solidified the theory of Sea Floor Spreading.
This impacted the theory of plate tectonics because it proved the theory of Sea Floor Spreading which made up of the theory of Plate Tectonics.
1968
Dan McKenzie
Dan McKenzie, 1968, came up of the theory of Plate Tectonics by using the theory of continental drift and sea floor spreading. Basically, the theory is that Earth's surface is covered in a series of crustal plates. Ocean floors are moving, spreading from the central point, sinking at edges, and being regenerated. Convection Currents move the plates. And the source of heat driving convection currents is in the Earth's mantle.
This is the theory of Plate Tectonics, so it impacted the world because everyone finally knew what happened with the Earth
John Tuzo-Wilson
1963-John Tuzo-Wilson came up with the theory that Plates might move over fixed "hotspots" in the mantle, forming volcanic island chains.
1965-He also came up with the theory of a third type of plate boundary- transform faults.

This impacted the theory of plate tectonics because it opened up more solutions on what happened with the Earth.
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