170 Preliminary Report Figures


Figure 6. Graphical representation and summary plots of shipboard core and downhole measurements. LWD = logging while drilling, MST = multisensor track, SGR = spectral gamma ray (total counts), and CGR = computed gamma ray (total counts minus contribution of uranium). Gabbro contact was located ~40 m deeper in Hole C than in Hole B; it remains uncertain whether this is caused by a depth datum problem or by a local geological feature (fault; discontinuous gabbro layer). Difference of gabbro depth between Holes B and D (~15 m) can be attributed to measured deviation of Hole D from vertical.


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