Preface The expedition ARK XIX/3 with the German icebreaking RV ...

Sound velocity:
As the cores all contained gas, the signal amplitude was generally very low and often
zero. Interpretation of these data with respect to travelling times (and thus, sound
velocities) is critical. However, travelling times for all cores were estimated to be
between 1000 and 1300 m/s for the longer cores. The Short cores (< 2m) and the
‘cold core’ showed the same low velocities at depth but at the very top, where good
acoustic coupling was present, sound velocities reached 1700 m/s.
Fig. B3.2-1: Triangles indicate the positions where gravity cores were taken.
Susceptibility:
Susceptibility (10 -6 SI) was quite homogeneous ranging between 100 and 200 in most
of the cores at all depths. The ‘cold core’ has two layers of enhanced susceptibility of
about 300 at approx. 0.7 and 4.4m depth. The core PS64/371 shows enhanced
susceptibilities in the upper 30 cm reaching values of 440.
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