IGNEOUS AND CRYSTALLINE ROCKS. 
103 
S. Absarokite, Two Ocean Pass. Contains augite, olivine, ortho- 
blase, magnetite, serpentine, little biotite, apatite, and an isotropic 
substance, probably glass. Analysis by J. E. Whitfield, record No. 906, 
T. Shoshonite, Beaverdam Creek. Analysis by Whitfield, No. 907. 
Probably the rock alread}^ represented by analysis G. 
U. Shoshonite, northeast spur of Sepulchre Mountain. Contains 
augite and serpentinized olivine, in a groundmass of plagioclase, ortho- 
clase, augite, magnetite, and apatite. Analysis by Whitfield, No. 908. 
V. Shoshonite, Baldy Mountain, Bear Gulch, Montana. Contains 
hypersthene, augite, olivine, plagioclase, orthoclase, and magnetite. 
Analysis by Whitfield, No. 909. 
Si0 2 .. 
A1A- 
Fe 2 3 
FeO.. 
MgO. 
CaO.. 
Na 2 . 
K 2 0.. 
H 2 0.. 
Ti0 2 . 
PA . 
MnO. 
so 3 
CI . 
C0 9 
51.68 
14.07 
4.71 
4.57 
7.72 
6.65 
2.45 
4.16 
2.09 
1.08 
.72 
trace 
trace 
.13 
100. 03 
T. 
52.86 
17.51 
5.18 
3.31 
4.18 
6.51 
3.22 
3.41 
1.76 
1.04 
.53 
trace 
.04 
.22 
.16 
99.93 
51.75 
17.48 
6.42 
1.46 
4.05 
8.20 
3.33 
3.72 
2.26 
.86 
.67 
trace 
trace 
.17 
trace 
100. 37 
v. 
54.9-7 
18.38 
3.06 
4.22 
2.38 
5.43 
3.45 
3.37 
.82 
.97 
.42 
trace 
.03 
.03 
trace 
2.92 
100. 45 
