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The main purpose of studying detailed gravity data is to provide a better understanding of the geological layers and density of topographic masses. The gravity method is a relatively cheap and very efficient, especially by using airborne techniques. Measurements of gravity provide informati on about densities of the Earth subsurface. There is a wide range in density among rock types, and therefore geologists can make inferences about the distribution of mass density. In the case of gravity surveys by using airborn...