The Werner deconvolution technique for automatic analysis of magnetic data is a powerful tool for the interpretation of magnetic profiles. In particular, the technique is a valuable aid to the interpretation of deep crustal structures beneath the continental margin which frequently lie below the penetration of all but the most high-powered seismic reflection tools. Inverse modelling of selected simple geological structures (buried scarp, graben, half-graben) confirms that the interface model is valuable in delineating the tops of magnetic bodies, while the thin sheet model gives an indication of the depth extent of the bodies. In the case of horizontal sheets in contact (simulating oceanic spreading anomalies), the thin sheet model delineates the boundary, while the interface model gives estimates which are too shallow.