Figure 2. A. Hand-contoured 100-m contour bathymetric map of Site 735
showing the location of Hole 735B (modified from Dick et al., 1991a).
SeaBeam tracks hand-shifted by eye to eliminate conflicts in the data.
Solid lines indicate actual data, while hatched lines show inferred
contours. Contour interval is 250 m. Small solid dots and arrows indicate
the starting point and approximate track of dredge hauls. Large solid dots
show the location of Sites 735 and 732 (just north of the contoured area
on the crest of the median tectonic ridge). Filled circles indicate the
approximate proportions of rock types recovered in each dredge: + =
gabbro, white = basalt and diabase, light stipples = greenstone, and heavy
stipples = serpentinized peridotite. B. Hand contoured bathymetric map of
the eastern rift mountains north of the SW Indian Ridge axis showing
crust of the same age as Site 735 and the conjugate position of Hole 735B
(735B') on the counter-lithospheric flow line, based on magnetic
anomalies and plate reconstruction. This conjugate site is the location of
SWIR 6, the final backup site for Leg 176, where the volcanic carapace
originally overlying Hole 735B is preserved intact.
To 176 Figure 3
176 Table of Contents