IGNEOUS AND CRYSTALLINE ROCKS. 
57 
The following analyses are of sedimentary rocks adjoining the dike: 
F. Calcareous standstone. 
G. Fine-grained fissile sandstone. 
H. Indurated shale. 
I. Fragment of shale included in the peridotite. 
Si0 2 _. 
A1 2 3 . 
Fe 2 3 
FeO.. 
MgO. 
CaO.. 
Na,0. 
H 2 0,llO°. 
H 2 0,ign-. 
Ti0 2 ..... 
PA--- 
Cr 2 3 ...-. 
MnO 
CO, 
K. 
60.78 
10. 54 
3.27 
1.59 
10. 15 
1.41 
2.36 
.85 
2.32 
.03 
.09 
10 
21) 
99.78 
G. 
60.25 
20.18 
1.53 
3.42 
3.52 
.51 
.39 
3.17 
1.94 
5.17 
.23 
.10 
10 
100. 51 
ii. 
41.32 
20.71 
2.59 
5.46 
1.91 
9. 91 
7.19 
.88 
8.78 
.48 
.08 
trace 
.17 
.55 
100. 03 
35. 53 
18.23 
2.46 
4.81 
2.01 
21.17 
2.53 
1.08 
1.40 
9.00 
.95 
.08 
.13 
100. 26 
H was dried five hours at 110°, previous to analysis. 
