
Figure F9.
Hole 808I breakouts (dark low-resistivity parallel lines) at 460-505 mbsf
interpreted from resistivity-at-the-bit images at 1-in (shallow), 3-in (medium),
and 5-in (deep) penetration from the borehole. This image is ~100 m below the
frontal thrust zone, close to the base of log Unit 2. The breakouts indicate
that the orientation of the minimum horizontal compressive stress (
2)
is ~northeast-southwest, which is in good agreement with the plate convergence
vector of ~310°-315° aligned with the maximum compressive stress,
1
(90° to
2).

