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4
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Normal Upper Mantle Rocks.
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5
|
When pressure decreases so that the rocks are partially able to melt. (_______ melting)
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6
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The result of hot saltwater and hot basaltic rocks exchanging ions. (_________ alteration)
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7
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Mineral made out of magnesium and iron.
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9
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The _____ cools as it spreads away from the ridge.
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11
|
New crust forms by intrusion and ______.
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1
|
At slow-spreading ridges, the normal faults dip _____ toward the axial valley.
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2
|
Intrusive Rocks.
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3
|
At fast-spreading ridges the faults dip in ________.
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8
|
The mid-ocean ridges lie about 2.5 km below ______.
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10
|
Crust is being _____ apart at mid-ocean ridges instead of being forced apart.
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