Figure F20. Resistivity-at-the-bit images of borehole breakouts at 1-in (shallow), 3-in (medium,) and 5-in (deep) penetration from the borehole, 460-505 mbsf. Breakouts occur ~100 m below the frontal thrust zone close to the base of log Unit 2. See Figure F19, , for details. Notice that the resistivity of breakouts shows little variation from the shallow to deep image, suggesting a similar degree of deformation and invasion at 1, 3, and 5 in from the borehole. This is in contrast to Figure F19, , where variability is seen between the three images. If possible variations in drilling parameters are excluded, this difference may be related to lithologic contrasts (note that sediments in the interval imaged by Figure F19, , have higher resistivity than the sediments imaged here).

Figure F20. Resistivity-at-the-bit images of borehole breakouts at 1-in (shallow), 3-in (medium,) and 5-in (deep) penetration from the borehole, 460-505 mbsf. Breakouts occur ~100 m below the frontal thrust zone close to the base of log Unit 2. See Figure F19 for details. Notice that the resistivity of breakouts shows little variation from the shallow to deep image, suggesting a similar degree of deformation and invasion at 1, 3, and 5 in from the borehole. This is in contrast to Figure F19, where variability is seen between the three images. If possible variations in drilling parameters are excluded, this difference may be related to lithologic contrasts (note that sediments in the interval imaged by Figure F19 have higher resistivity than the sediments imaged here).