Figure F8.
Planktonic foraminifer
G. ruber
18
O record, SiO
2
/Al
2
O
3
, SiO
2
/K
2
O, K
2
O/Al
2
O
3
ratios, and CIA (CIA = molar ratio of [Al
2
O
3
/(Al
2
O
3
+ Na
2
O + K
2
O + CaO
inorganic
]
x
100) vs. age. MIS = marine isotopic stage.
18O record, SiO2/Al2O3, SiO2/K2O, K2O/Al2O3 ratios, and CIA (CIA = molar ratio of [Al2O3/(Al2O3 + Na2O + K2O + CaOinorganic] x 100) vs. age. MIS = marine isotopic stage.
