Please help me understand this .. Seafloor spreading?
Some of the strongest evidence of seafloor spreading from studies of Earth's magnetism. The Earth has a magnetic field around it. A compass is aligned with the field. The arrow points to the north pole magnetic field of the Earth. In the past, however, Earth's magnetic field has reversed many times. The north and south poles switching back and forth. The seafloor rocks reveal A record of this investment.
The significance is that when a high iron content of lava (mafic magma chemistry origin) is cooled and crystallized, the ferromagnetic material is aligned with the magnetic field, creating a permanent and unchangeable record of the direction to the north / south pole. Now, address real pole at the bottom of the sea spread is not very important (to reach the continental orientation, when it becomes important). The important thing is that this stone how the distribution center (part of the Central Cordillera Mar) and solidify. Great. But we can look down on the magnetic map of the seabed, and see the Cordillera Mid-Atlantic (for example), and we can see that are not completely identical "magnetic stripe" on each side of the ridge. The only way this could have happened is that the distribution center was … dissemination … which means that the crust away equally in both directions. If we have an "envelope" then a long "out", followed by a sequence of pitches between the greats "in the de-on" and are perfect side to side – that only may mean that the rock away from the ridge, because there is no natural mechanism for creating parallel paths. Therefore it is important, and how to know that the floor is actually diffusion.
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