638
Bleil and von Dobeneck
Age [ka] and & 18 0 Stages
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SUb-bottom Depth [em]
Fig. 2. Core GeoB 1523-1 time series of stable oxygen isotopes (Mulitza 1994) and rock magnetic parameters. The
magnetite grain-size indices, ratio of specific saturation remanence O"rs to specific saturation magnetization o"s and
median field of remanent hysteretic magnetization Brh (von Dobeneck 1996), hint at on average slightly coarser
magnetic minerals below about 3.5 m sub-bottom (vertical dashed line), possibly reflecting minor diagenetic corrosion effects. In contrast, susceptibilities of the non-ferrimagnetic sedimentary matrix Xnf and of the ferrimagnetic
mineral fraction Xfe as well as the remanence carrying magnetic component represented by the saturation remanence
O"rs all show no consistent downcore trends, but a striking correlation to the climate 8 18 0 record. Horizontal white
lines indicate mean values, gray bars standard deviations. Numbers at the age axis denote oxygen isotope stages,
vertical gray bars cold stages.