CLARK E. | 
IGNEOUS AND CRYSTALLINE ROCKS. 
151 
C. Sodalite from A. Sp. gr., 2.265. 
D. Analcite from A. Sp. gr., 2.255. 
In addition, the orthoclase gave 3.88 per cent Na 3 and 11.03 per 
cent K 2 0. A separation of mixed feldspars (sp. gr., 2.56) gave 6.08 
per cent Na a O and 8.91 per cent K 2 0. 
|i0 2 .. 
AlA- 
Fe 2 3 
FeO. 
MgO. 
CaO.. 
ka 2 0. 
H 2 above 100° 
po 2 
PA 
NiO 
Mn() 
CI :. 
Less 
56. 45 
20.08 
1.31 
4.39 
.63 
2.14 
5.61 
7.13 
. 26 
1.51 
.29 
.13 
trace 
.09 
.43 
100. 45 
.10 
100. 35 
B. 
38.41 
17. 65 
3. 75 
21. 75 
2.54 
10.52 
2.95 
1. 95 
21 
trace 
.15 
99. 91 
c. 
41. 56 
29.48 
.49 
.15 
.49 
19.21 
.91 
.45 
3.73 
4.79 
101.26 
1.08 
100. 18 
49. 54 
25. 07 
.40 
.20 
.22 
15. 32 
.89 
undet. 
undet. 
1.6^ 
93.31 
.38 
92.93 
8. LITTLE ROCKY MOUNTAINS. 
Granite-syenite-porphyry. Liparose. Described by Weed and 
Pirsson, Journal of Geology, vol. 4, p. 399. Contains orthoclase, 
quartz, oligoclase, iron oxides, and a little muscovite. Analysis by 
H. N. Stokes, record No. 1558. P. R. C. 905. 
Si0 2 68.65 
IlLOo 18. 31 
FeA 
FeO 
MgO 
CaO 
Na 2 
K 2 
H 2 at 110° . . . 
H 2 above 110 c 
Ti0 2 
.56 
.08 
.12 
1.00 
4. 86 
4.74 
.27 
.83 
.20 
PA - trace 
MnO 
SrO . 
BaO. 
trace 
0.10 
13 
Li 2 trace 
S0 3 trace 
CI 03 
F trace 
99.88 
