An isostatic overcompensation can be geologically explained by assuming that an erosion of the mountains is not accompanied by a simultaneously occuring corresponding reduction of the mountain roots. The adjustment of the mountain roots is assumed to follow with a considerable delay. A mathematical model presented by Arnold (1977) is employed as a basis for the determination of the global isostatic overcompensation. A positive value of the obtained coefficient appears to be significant. The most probable amount of isostatic overcompensation should correspond to a value in the range from 3 to 4% with respect to the mountain roots. Three variants are considered concerning the lateral variations of the density in the earth's interior.
Gerlands Beitraege zur Geophysik
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- Density Distribution;
- Earth Crust;
- Spherical Harmonics;