| Concluding
from seismology: |
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| " | Solid mantle and
liquid outer core |
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| " | velocity change
at 670km defining upper and lower |
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| mantle |
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| " | Global tomography
showing large warm regions |
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| under Pacific
& Africa |
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| " | Large variations
in seismic velocity near core |
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| mantle boundary |
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| " | Subducting plates are penetrating into
lower mantle |
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| " | Origin of
Hotspots still unclear (670km ??, D´´, ..) |
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