The gravity method can be used to determine subsurface structures in an area. The data is data longitude, latitude, and CBA in mgal. Data processing begins with a 2D and 3D contour using the software Surfer 9. In making this contour, the coordinates in UTM coordinates. The results of two-dimensional contours, which have been obtained, then we make separation of local and regional anomalies using MagPick software. After that, both of them reprocessed using the software Surfer 9 to be "slice" or "cross-section" at the local and regional anomalies. The results of the cross section then processed to create a model in the form of layers so that the resulting curves cross section close to the results that have been observed previously.
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