CLARKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
249 
The following analyses are of serpentines derived from a peridotite- 
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. 
Si0 2 
A1A 
FeA 
FeO 
MgO 
CaO 
Na 2 
K 2 
H 2 Oatl00°... 
H 2 above 100 
PA 
Cr 2 0, 
NiO 
MnO 
H. 
i. 
J. 
38.53 
40.50 
36. 57 
14.55 
.78 
.95 
2.65 
4.01 
7.29 
4.01 
2.04 
.37 
21.79 
37. 43 • 
40. 27 
3.13 
.39 
.14 
.07 
.28 
.31 
.88 
.16 
trace 
4.51 
2.81 
.94 
9.56 
10.94 
12.43 
trace 
trace 
trace 
.41 
.33 
trace 
.11 
.31 
.32 
.13 
.10 
100. 00 
99.99 
100. 01 
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. 
