302
Diekmann et al.
Isotope Stages
1 2 3 4
5
6
7
8
9
10 11
1.00
2.5
0.75
3.0
OJ
0
~
0
cc
3.5
a..
£:
0.50
l
~
4 .0
0
ca
co
~
0.25
';0
4.5
0.00
5.0
0
50
100
150
200
250
300
350
400
Age (ka)
Fig. 9. Temporal variations of the kaolinite/chlorite-ratio inferred from sediment core PS2082-1 from the Agulhas
Basin . The applied age model was deduced from the benthic foraminiferal 8 1 '0 record of Cibicidoides spp.
(grayish colored curve) (Mackensen et al. 1994) and corroborated by radiolarian biofluctuation stratigraphy
of Cycladophora davisiana (Macken sen et al. 1994; Brathauer 1996). White rectangles indicate gaps in the
8 1 '0 record.
Isotope Stages
2
3
4
5
6
1.0
2
0
OJ
° ia
0
a..
CC
~
:c 0.5
4
()
0
0co
ca
00
~
0.0
6
0
20
40
60
80
100
120
140
Age (ka)
Fig. 10. Age-related variations of the kaolinite/chlorite-ratio in sediment core PS 1768-8 from the western
SW Indian Ridge. The applied age model was deduced from the planktic foraminiferal 8 1 '0 record
of Neogloboquadrinapachyderma (sinistral) (grayish colorized curve) (Niebler 1995) and additional
chronostratigraphic information from I4C AMS and 2JoTh" measurements (Frank et al. this volume).