Figure 9: Animation of Electrical Resistivity Tomography (ERT) using the FlashRes64 instrument which is a multi-channel, free-configuration system. The data cube comprises five inverted sections using an inter-probe separation of 0.5m. The location of the survey was based on an initial Twin-Probe area survey which indicated the position of some of the pits. The ERT data are characterised by a relatively low resistivity topsoil layer followed by an extremely high value band about 1m thick. Below this band the values are more modest. Significantly, where the pits had been predicted by the Twin-Probe array the ERT suggests that the highly resistive layer has been cut by pits of significant size. These can be seen within the cube and the animated height field display.