magnetic rocks on the ocean floor show that the Earths magnetic field has been frequently reversed forming new sea floor.
Magnetic patterns in the rocks along mid-ocean ridges reveal a symmetrical arrangement of magnetic stripes that record Earth's magnetic field reversals over time. As magma rises and solidifies at the ridge, it captures the Earth's magnetic orientation at that moment. This process occurs continuously, causing new crust to form and pushing older crust away from the ridge, which is the fundamental principle of seafloor spreading. The mirror-image patterns on either side of the ridge provide strong evidence for this ongoing geological process.
The patterns of iron particles found in sea floor rocks result from changes in the Earth's magnetic field over time. As the molten rock solidifies into rock, the iron particles align with the Earth's magnetic field at that time, creating unique patterns that can be used to study the history of the Earth's magnetic field and plate tectonics.
There are almost no extrusive rocks on the earths surface because they are all under the earths surface. They are mainly lower than the earths surface.
Silicon
the crust and the core
iron and magnesium
magnetic rocks on the ocean floor show that the Earths magnetic field has been frequently reversed forming new sea floor.
it is made of rocks
Basalt and limestone.
Magnetic patterns in the rocks along mid-ocean ridges reveal a symmetrical arrangement of magnetic stripes that record Earth's magnetic field reversals over time. As magma rises and solidifies at the ridge, it captures the Earth's magnetic orientation at that moment. This process occurs continuously, causing new crust to form and pushing older crust away from the ridge, which is the fundamental principle of seafloor spreading. The mirror-image patterns on either side of the ridge provide strong evidence for this ongoing geological process.
The patterns of iron particles found in sea floor rocks result from changes in the Earth's magnetic field over time. As the molten rock solidifies into rock, the iron particles align with the Earth's magnetic field at that time, creating unique patterns that can be used to study the history of the Earth's magnetic field and plate tectonics.
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Earths magnetic orientation is locked into the rock when the rock cools
Silicates make up close to 95 percent of the rocks in the Earth's crust
The basic materials of the earths crust are; silicate rocks, primary granite, igneous, metamorphic, and sedimentary rocks.
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