Figure 1. Section through Leg 168 drilling sites showing seafloor and basement topography and crustal age. The profile, derived from seismic reflection data, crosses the ridge at 48°N and is oriented at N107°E, perpendicular to the strike of the ridge crest. Triangles indicate locations of reentry cones and borehole observatories (CORKs), and temperatures are those measured directly at the sediment/basement interface or estimated from extrapolation of profiles measured in overlying sediments.

Figure 1. Section through Leg 168 drilling sites showing seafloor and basement topography and crustal age. The profile, derived from seismic reflection data, crosses the ridge at 48°N and is oriented at N107°E, perpendicular to the strike of the ridge crest. Triangles indicate locations of reentry cones and borehole observatories (CORKs), and temperatures are those measured directly at the sediment/basement interface or estimated from extrapolation of profiles measured in overlying sediments.