
Figure F13.
Resistivity-at-the-bit image of the frontal thrust zone at ~389-414 mbsf. The
fault zone is characterized by a general increase in resistivity relative to the
sections above and below with conductive (open?) high-angle fractures. Bedding
is unclear within this image but the possibility remains that features
interpreted as fractures could be steeply dipping high-conductivity bedding
planes. The orientation of fractures appears to change from the upper to lower
part of the fracture zone, from a northeast-southwest to an
east-northeast-west-southwest strike. The average fracture strike of
east-northeast-west-southwest (dip directions north-northwest and
south-southeast) is slightly more easterly than the orientation of minimum
horizontal stress determined from borehole breakouts in this part of Hole 808I
(Figs. F19, F20).
The position of the three-dimensional (3-D) borehole view of Figure F16
is indicated.

