CLARKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
67 
The following analyses are of sedimentary rocks adjoining the dike: 
F. Calcareous sandstone. 
Or. Fine-grained fissile sandstone. 
IT. Indurated shale. 
I. Fragment of shale included in the peridotite. 
Si0 2 GO. 78 
A1 2 3 10. 54 
FeA 3.27 
FeO 
MgO 
CaO 
Na 2 
H 2 at 110° 
H 2 0, ign... 
Ti0 2 
PA 
Cr 2 3 
MnO 
C0 2 
1.59 
10.15 
1.41 
2.36 
.85 
2.32 
.03 
.09 
.10 
6.29 
99.78 
60. 25 
20.18 
1.53 
3.42 
3.52 
.51 
.39 
3.17 
1.94 
5.17 
.23 
.10 
.10 
100. 51 
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 
L3 
100. 26 
H was dried five hoars at 110° previous to analysis. 
