| Bouguer gravity anomalies |
Variations in the Earth's gravitational acceleration, corrected for the height above sealevel, of the observation and for the total mass of rock between the observation point and sea level. |
| Density |
Physical rock property defined as total mass devided by volume (kg/m³ ) |
| Free-air gravity anomaly |
Deviation of the observed gravity field at sealevel from the value predicted by a global model. |
| Gravimeter |
High precision instrument to measure minute variations in the Earth's gravitational attraction that exist as a result of density variations in the underlying rock formations. |
| Gravity anomalies |
Deviations from the predicted gravity field. |
| Isostasy |
Process of vertical adjustments of anomalous mass to balance the upward floating and the gravitational downward force. A good example is an iceberg, floating in water. |
| mGal |
Unit of gravitational acceleration, equivalent to 0.00001 m/s2. |
| Newton's law of gravity |
Two masses attract each other with a force that is proportional to both masses and inversely proportional to the squared distance between them. This force is called the gravitational attraction. |
