Dictionary:Fig E-1

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FIG. E-1. Earth layering. (a) Terminology. (b) Variation of physical properties with depth within the Earth. P=pressure in 1011 Pa, ρ=density in g/cm3, β=S-wave velocity in km/s, α=P-wave velocity in km/s, G=gravity in Gal, T=temperature in K. The dashed curve represents the solidus in the core. (After Haddon and Bullen, 1969.)