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Fig. 2
Geology of the frontal thrust zone. (
a
) Track of Dive 6K#938 in the 1st ridge (map area
indicated in Fig.
1b
). Localities of photographs (
b
-
h
) and samples with porosity and uniaxial
compressional strength (UCS) data are shown. (
b
) Outcrop of fossilized cold seep zone. A fossil
of Vesicomyid bivalve (
inset
) was found buried in conglomerate. (
c
) An outcrop with orthogonal
joint sets. Field of view (FOV) ~ 3 m. (
d
) Bedding planes with cross laminae. FOV ~ 2 m.
(
e
) Ripples and dark sand covering a hump extending southeast from the crest of the 1st ridge (
a
).
(
f
) An outcrop of a conglomerate interbedded with sandstone layers and cemented by carbonate
minerals. FOV ~ 3 m. (
g
) Thrust fault recognized as oblique plane filled with a thin light film,
offsetting bedding planes. FOV ~ 3 m. (
h
) Normal faults offsetting bedding planes. Drags were
partly developed. FOV ~ 1 m
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