Models for the structure of the basin are in part based on their interpretation of the gravity anomaly together with data from seismic surveys and a borehole at Kempsey.
32.
This region is characterized by low free-air gravity anomaly, bathymetric depression, and a change of convex to concave trench axis geometry ( which is a feature unique to this location ).
33.
During the 38-day cruise, the scientists collected data on such things as water temperature, salinity, ocean depth, ice thickness, gravity anomalies and ice composition as seen by an upward-looking video camera.
34.
The surface gravity field used in the Unified WGS Solution consisted of a set of 410 10?& times; 10?equal area mean free air gravity anomalies determined solely from terrestrial data.
35.
A "'gravity anomaly "'is the difference between the observed acceleration of free fall, or gravity, on a planet's surface, and the corresponding value predicted from a model of the planet's gravity field.
36.
J . Phipps Morgan and others have suggested that subcircular Bouguer gravity anomalies recognized beneath the Deccan Traps may indicate the presence of verneshot pipes related to the Cretaceous Paleogene extinction event.
37.
Other geophysical techniques ( electrical, gravity and magnetic observations ) include monitoring fluctuations and sudden change in resistivity, gravity anomalies or magnetic anomaly patterns that may indicate volcano-induced faulting and magma upwelling.
38.
TU Delft faculty geologist were Berend George Escher, Johannes Herman Frederik Umbgrove, discoverer of Bushveld complex Gustaaf Adolf Frederik Molengraaff and discoverer of gravity anomalies above the sea level Felix Andries Vening Meinesz.
39.
Gravity on the surface of this ellipsoid is then given by a simple formula which only contains the latitude, and subtraction from observed gravity in the same location will yield the gravity anomaly.
40.
The accumulation of dense nitrogen ice would have contributed to making Sputnik Planitia a positive gravity anomaly, but by itself would not have been sufficient to overcome the topographic depression associated with the basin.
