When the sea floor spreading rates slowed around ~ 85 Ma, so did the amount of basaltic material being thrown into the ocean which caused the initial water displacement.
12.
Around 83.5 Ma sea floor spreading between India and Antarctica was asymmetric in the Kerguelen Plateau region with two-thirds of the sea floor created being added to the Antarctic Plate.
13.
It not only provided the basis for confirming the hypothesis of sea floor spreading, but it also was a technique for quantifying rates and amounts of crustal plate movements on a global scale.
14.
Some of " Eltanin "'s research cruises collected magnetic profiles of the sea floor that proved to be pivotal evidence in the acceptance of the continental drift theory, by proving the existence of sea floor spreading.
15.
Thus, the new mobilistic concepts neatly explained why the Earth does not get bigger with sea floor spreading, why there is so little sediment accumulation on the ocean floor, and why oceanic rocks are much younger than continental rocks.
16.
Stretching for hundreds of miles north and south of Eastern Island, 2, 000 miles off the coast of Peru and Chile, this long line of volcanoes is caused by sea floor spreading along the great continental plates of the earth's crust.
17.
In reports on the research in Friday's issue of the journal Science, the scientists said the magnetic stripes imprinted on parts of Mars like a bar-code were " reminiscent of similar magnetic features associated with sea floor spreading and crustal genesis on Earth ."
18.
The geological history can be classified into five tectonic evolutionary stages . ( 1 ) rift system development ( 2 ) sea floor spreading, ( 3 ) subsidence of the South China Sea, ( 4 ) closure of the South China Sea Basin and ( 5 ) uplift of Taiwan.
19.
In one of the journal reports, a research team led by Connerney wrote, " The most straightforward interpretation of the magnetic lineations in the Mars highland crust is that they formed early in the planet's evolutionary history by plate tectonics and sea floor spreading, analogous to terrestrial oceanic crust ."
20.
The overall pattern, defined by these alternating bands of normally and reversely polarized rock, became known as magnetic striping, and was published by Ron G . Mason and co-workers in 1961, who did not find, though, an explanation for these data in terms of sea floor spreading, like Vine, Matthews and Morley a few years later.
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