Figure F8.
Oxides vs. Mg# for average and single-spot analyses of brown hornblende grains in Hole 735B gabbros. All iron is given as FeO.
A.
Al
2
O
3
.
B.
CaO.
C.
K
2
O.
D.
TiO
2
.
E.
Na
2
O.
F.
Cr
2
O
3
.
