Red marks areas of high gravity, while dark blue shows the lowest pull, measured in Radial Gravity Anomalies (mGALS ... This creates a Bouguer gravity map, seen below, which subtracts the ...

It looks like a topographical map, but actually it's a Bouguer gravity anomaly map. The best explanation I could find for gravity anomaly maps is from this Earth Observatory page from NASA.

We analyse the residual mantle Bouguer gravity anomaly (RMBA) from 19 oceanic transform ... transform on the Mid-Atlantic Ridge, at the same map scale. Figure 3: Results of 2D forward models ...

The observed low gravity beneath the caldera is aligned ... Figure 2: Survey area and local Bouguer anomaly maps of Ilopango caldera. The main local negative Bouguer anomaly is located beneath ...

Additionally, this survey has indicated numerous unexplored anomalies across the property, further expanding the scope for discovery and emphasizing the strong exploration potential of the area.

has resulted in a detailed Bouguer gravity map for the study area. This map correlates well with the local geology. Large positive anomalies are associated with the Halifax Formation of the Meguma ...