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PPLC
1
PPLC
2 PPLC 3 PPLC 4
PPLC
5
a b a b c
LMBB
25 x10-3
20
15
10
5
U13
38 B
aSO
4 M
AR(g
cm
ky
r 2
)U
1338
BaS
O4/
clay
ratio
1.2
0.8
0.4
0.0
U1338 opal M
AR(g
cm
kyr )
2
0.20
0.10
0.00
U1338 clay M
AR(g
cm
kyr 2
)
800070006000500040003000200010000Age (ka)
0.1
0.2
0.3-1
-1-1