Downhole log images obtained in Hole U1413C.  From left to right, the three images display the UBI amplitude (which is related to the small-scale roughness of the borehole wall), the UBI borehole radius, and the FMS images measured by four microresistivity pads.  The FMS pad azimuth curve (light blue) marks the orientation of the pair of caliper arms that measured the greater borehole diameter.