582
Frederichs et al.
50 0 W
40°
30·
20·
10·
0°
10·E
lOON .K n. /K
para·/diamagnetic matrix
a
O·
South America
0
'i' .•
ma2netlsm O · ~
@
100S
@ 0
... "
06 > 04> 03 > 0 .
2> 01 > 0 .0 >-05
looN S-O.3T
,.
~
-
0°
0 - ®~~
~
'.
0 . .. .
....., . . 0.0
;OQ
100S
10· N Mrs/Ms
O·
finer • magnetite gtain.siz8. coarser
•
@0 00
035 >Oll >025 >0.20 >0.15>0 10 >004
10· S
O·
higher , magnetile stability . lower
®
•
®0 00
18 > 16 > 14 > 12 > 10 > 8 > 6
10· S
50· W
40·
30·
20·
10·
O·
10' E