“…Then at least 10 FTG observation points on a profile at right angles to the fault and in close proximity are used to create a characteristic curve using a least squares best fit. Once the closed Txx-Txz curve is established, the dip, throw and density contrast are directly calculated (FitzGerald and Holstein, 2014). Initial applications indicate 3D faults that are sheet-like, can be derived in mining and oil exploration settings that have had a strong tectonic or rift-like history.…”