Abstract
This study is based on the analysis of gravity data of the Mornag plain. Its purpose is to increase the knowledge of this basin's structure. A residual anomaly map was first calculated from the Bouguer anomaly by removing a regional gradient. The computed map provides information on the ground density variation within the shallow sedimentary basin of Mornag. In order to highlight the different structures of the basin, we have calculated the magnitude of the horizontal gradient (MGH). This technique allowed us to determine the gravimetric lineaments which represent the contrasts in density and then deduce a structural map of the surveyed area. This map constitutes a very useful document for planning future hydrogeological exploration in the Mornag plain region.