In 2010, an exploration well was drilled at the Lona prospect in the Orphan Basin, Canada, whose location was based primarily on a structural high at the base of a Cretaceous unconformity. Additionally, a 3D inversion of controlled-source electromagnetic (CSEM) data collected in 2007 and 2009 indicated elevated resistivities that roughly correlated with the structural high, indicating the possibility of hydrocarbon-saturated sediments. The well did not encounter hydrocarbons, and the results were considered a false positive. In an effort to better understand the geologic significance of the elevated resistivity anomaly, we have reexamined the original interpretation of the Lona prospect by using a seismic image-guided inversion algorithm to analyze CSEM data from a synthetic model and the field data and correlate those results with lithology predictions from seismic amplitude versus angle inversions. We conclude that the anomalously high resistivities seen are due to the high volumes of cemented sand lithology and not to the presence of hydrocarbons. We speculate that if the results shown here had been available at the time, CSEM would not have provided support to the decision to drill.