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Why is it believed that the Earth's magnetic field has reversed its polarity in the past?
Wiki User
∙ 14y ago
By observing magnetic rocks in geological deposits.
By observing magnetic rocks in geological deposits.
By observing magnetic rocks in geological deposits.
By observing magnetic rocks in geological deposits.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoBy observing magnetic rocks in geological deposits.
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Can global warming be cause from the earths core?
No the earths core is not a cause of globel worming
Earths Litosphere Is Broken Into Separate Sections Called?
Earths lithosphere is made up of upper mantle. The earths lithosphere is broken into separate sections and it is called as tectonic plates or plate tectonics.
What is earths most important source of light?
the sun
Are canyons a slow change in earths surface?
Yes.
How are all of the layers of the earths atmosphere different?
Because.
How is earths magnetic field used by people and animals?
the earths magnetic signature is a negative polarity signature
Does the earths magnetic field has periodically reversed direction?
Yes. In historical times , clay pots have shown that the earth's magnetic field has reversed.
About how long ago was the last time earths magnetic field reversed?
About 41,000 years ago.
Earth's magnetic field results from the spinning of the?
The earths magnetic field results from deep in the earths core. Magnetic conduction from within the earths core is believed to be the cause of this.
The way in the Earths core spin is believed to be the source of its?
magnetic field.
The patterns of iron particles found in sea floor rocks result from what?
The earths magnetic polarity at the time of rock formation.
Will the polarity of the earths magnetic field change in 2012?
There is no reason to believe that the Earth's magnetic field will change any time soon... or, for that matter, that anything extraordinary is going to happen in 2012.
Why are magnet patterns important evidence for plate tectonics?
magnetic rocks on the ocean floor show that the Earths magnetic field has been frequently reversed forming new sea floor.
The alignment of iron-bearing minerals in rocks when they formed reflections the fact that earths has reversed itself several times in its past?
magnetic field .
When new basalt forms along mid-ocean ridges it become magnetized?
accorsing to the earths magnetic field
Explain how the reversal of earths magnetic poles can be produce a calendar for part of earths history?
In rock formed when the sea floor is being built, such as at the mid-Atlantic ridge, the minerals preserve the magnetic polarity. Since the flipping of the poles is fairly regular, the count of the bands can give a time.
How is earths magnetic field generated?
It is believed that there are currents of molten iron ore in Earth's interior, which cause this magnetism.
