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Gravity anomaly - Wikipedia, the free encyclopedia (428 words) |
 | A gravity anomaly is the difference between the observed gravity and its theoretical value, which is calculated at the surface of an global spheroid (ellipsoid of Hayford or WGS84) by rather simple formulas (2 functions of latitude). |
| Bouguer anomalies are ideal for geophysics because they show the effects of different rock densities of the subsurface. |
| The Bouguer anomalies usually are negative in the mountains because of isostasy: the rock density of their roots is lower, compared with the surrounding earth's mantle. |
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