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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.
What else can I help you with?
Is it true when magnitic minerals grains in a rock form they become magnetized in the direction parallel to earth existing magnetic field?
Yes, when magnetic mineral grains in a rock form, they can become magnetized in the direction parallel to Earth's existing magnetic field. This is due to the alignment of the mineral grains with the magnetic field at the time of formation, resulting in the retention of this magnetization in the rock.
What is the difference between a rift valley and a mid ocean ridge and what kinds of boundaries do they form at?
A rift valley is a large depression where tectonic plates are moving apart, creating a gap in the Earth's crust. This forms at divergent boundaries, where plates move away from each other. A mid-ocean ridge is an underwater mountain range formed by the divergence of tectonic plates. They also form at divergent boundaries, specifically at oceanic spreading centers.
Why are oceans far away form a ridge?
cuz rocks come up from the ridge and create land by 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.
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 form a mid ocean ridge?
tectonic plates
What are the names of the two plates that separate to form the North Atlantic Ridge?
The North American Plate and the Eurasian Plate separate to form the North Atlantic Ridge. This ridge is a divergent boundary where the two plates are moving away from each other, creating new oceanic crust in the process.
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
When new rock is added to an oceanic ridge the magnetized strips on either side of the ridge are evidence of sea-floor spreading. This is because the rocks on the two sides of the ridge?
form mirror images of each other in terms of magnetic polarity, showing symmetrical patterns that indicate the direction and rate of sea-floor spreading. The stripes consist of alternating bands of normal and reversed polarity, corresponding to periods of magnetic field alignment in Earth's history, providing insights into the process of plate tectonics and the movement of Earth's lithosphere.
How do you find the w2 form online for garden ridge?
how can i get my w2 form from garden ridge They are required to mail your W-2 to you by January 31. It is a little early (January 18) for it to be available.
