CLARK E.l 
IGNEOUS AND CRYSTALLINE ROCKS. 
The following analyses are of serpentines derived from 
pyroxenite dike: 
H. Almost black. Possibly derived from adjacent shale. 
I. Almost black. Derived from pyroxenite. 
J. Bastite. Derived from pyroxenite. Record No. 1166. 
K. Friable serpentine. 
215 
i peridotite- 
Si0 2 
A1 2 3 
Fe 2 3 
FeO 
MgO 
CaO 
Na 2 
K 2 
H 2 at 100° 
H 2 above 100° 
^ 
Cr 2 3 — - 
NiO 
MnO 
11. 
38.53 
14.55 
2.65 
4.01 
21.79 
3.13 
.07 
.88 
4.51 
9.56 
trace 
trace 
trace 
.32 
100. 00 
40.50 
.78 
4.01 
2.04 
37.43 
.39 
.28 
.16 
2.81 
10.94 
trace 
.41 
.11 
.13 
99. 
36. 57 
.95 
7.29 
.37 
40.27 
.14 
.31 
trace 
.94 
12.43 
.33 
.31 
.10 
100. 01 
K. 
36.96 
.39 
5.00 
2.34 
33.84 
3.81 
.34 
.14 
2.16 
14.02 
.02 
.78 
trace 
.09 
99.89 
Accidental organic matter was deducted from analyses H and I, with subsequent 
recalculation of the data to 100 per cent. 
