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A CVES survey has been conducted in order to test the method and locating a coal-bearing sedimentary layer in an otherwise dominated basaltic environment showing considerable topography. The data has been initially interpreted using the smooth 2D minimum structure inversion. The results showed that data did not contain much information in the deeper section and the sedimentary section could therefore not be confidentially mapped. However good estimates of the thickness of the overburden and the presence of a shallow underground down-hill water flow can be mapped with confidence.