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How does rock that form at a mid-ocean ridge become magnetized?
Wiki User
∙ 13y ago
Rocks on the sea floor deposited by the mid ocean ridges often contain magnetite. As the magnetite cools and crystallizes, they align with the earth's magnetic poles with the north side of the crystal pointing north and the south side pointing south
The earth's magnetic poles(and magnetic field) are caused by actions within the the earth's liquid core. The liquid outer core moving around the solid inner core acts like an electromagnet which creates both the magnetic poles and magnetic field.
As the mid ocean ridges deposit new sea floor containing magnetite, the earth often switches polarity. The rocks on the sea floor align themselves to the poles at the time they form. So, the mid ocean ridges create new seafloor, pushing the older seafloor away. And then when the polarity switches the magnetite crystals in new seafloor align themselves in a direction opposite to the ones deposited before the switch. This causes parallel bands of magnetic rock forming on either side of the mid-oceanic ridges.
Wiki User
∙ 13y ago
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What is the difference between a rift valley and a mid ocean ridge and what kinds of boundaries do they form at?
a rift valleyis a dip in the ocean floor a mid ocean ridge is a mountain chain formed on the ocean floor . Rift valley - divergent boundary MidOcean Ridge Convergent Boundary
Is it true when magnitic minerals grains in a rock form they become magnetized in the direction parallel to earth existing magnetic field?
true
What type of plate boundary form a mid ocean ridge?
A mid-ocean ridge forms at the divergent plate boundary. This boundary initially forms rifts that later on become rift valleys.
How do strip of magnetized rock on the ocean floor provide evidence of sea-floor spreading?
Strips of ocean-floor basalt record the polarity of earth's magnetic field at the time the rock formed. These strips form a pattern that is the same on both sides of the mid-ocean ridge. the pattern shows that ocean floor forms along mid-ocean ridges and then moves away from the ridge.
How do strips of magnetized rock on the ocean floor provide evidence of sea-floor spreading?
Strips of ocean-floor basalt record the polarity of earth's magnetic field at the time the rock formed. These strips form a pattern that is the same on both sides of the mid-ocean ridge. the pattern shows that ocean floor forms along mid-ocean ridges and then moves away from the ridge.
Why are oceans far away form a ridge?
cuz rocks come up from the ridge and create land by the ridge
What does an arete form?
An arete is a mountain ridge that is steep sided and narrow along the ridge.
How did the mid Indian ridge form?
Converging
What are the names of the two plates that separate to form the North Atlantic Ridge?
The North American and Eurasian plates separate to form the North Atlantic Ridge.
How are magnetic domains arranged differently in a magnetized material and in a material that is not magnetized?
The magnetic domains of an unmagnetized material will be pointing in random directions, which is why it is appearing to me unmagnetized. In a magnetized material, they move from north to south.
When new basalt form along mid-ocean ridges it becomes magnetized?
accorsing to the earths magnetic field
What form a mid ocean ridge?
tectonic plates
