The fascinating thing about the rocks are that the magnetic alignments change and reverse polarity at times.
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Sea floor spreading 2 mid atlantic ridge that mirror each other.
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The strips of paper represent oceanic crust or seafloor.
Seafloor spreading theory that oceanic crust forms along submarine mountain zones known collectively as the mid ocean ridge system and spreads out laterally away from them.
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Their crystals are pulled into alignment by the earth s magnetic field just like a compass needle is pulled towards magnetic north.
The earth does not get bigger.
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Seafloor spreading is the creation of new seafloor or new oceanic crust 5.
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Molten rock pushes up from the asthenosphere and pushes the plates apart at the mid ocean ridge.
Seafloor spreading activity most basalt magmas contain abundant molten iron.
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As magma starts to harden into rock iron rich minerals solidify first.
The center slit represents a mid ocean ridge 2.
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The oldest sections should be the sections on both sides furthest from the middle 4.
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This creates new ocean crust.
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