Example below is a close-up of a 3D well log pseudo-seismic display. The wiggle traces were generated from the gamma ray curves and the underlying variable-density display was generated from the resistivity (deep induction log, ILD) curves. The Carter Sand interval of the Parkwood Formation is highlighted. Illustration is from the cover of the 2016 volume of the Transactions of the Gulf Coast Association of Geological Societies (GCAGS) from a paper by Robinson and Espinosa.