108 
ANALYSES OF ROCKS, IT. S. GEOLOGICAL SURVEY. [no. 228. 
3. ABSAROKA KANGE. 
1. CRANDALL BASIN. 
Rocks described by Iddings in Mon. XXXII, Pt. II. The analyses 
also appeared in Bull. Phil. Soc. Washington, vol. 12, p. 204. 
A. Gabbro-porphyry, Hurricane Ridge. Camptonose. Contains 
augite, plagioclase, hypersthene, biotite, magnetite, and a little olivine. 
Analysis by L. G. Eakins, record No. 1089. 
B. Basalt flow, north side of Timber Creek. Andose. Rich in oli- 
vine, augite, and magnetite. Analysis by Eakins, No. 1087. 
C. Basalt dike, ridge south of Hurricane Ridge. Shoshonose. Like 
B. Contains also labradorite and a little orthoclase. Analysis by 
Eakins, No. 1087. 
D. Mica-gabbro-porphyiy, Hurricane Ridge. Camptonose. Con- 
tains plagioclase, augite, hypersthene, biotite, and magnetite. Analysis 
by Eakins, No. 1089. 
E. Mica-gabbro, Hurricane Ridge. Andose. Like D, with some 
orthoclase and a little quartz and olivine. Analysis by Eakins, No. 
1089. 
F. Basalt-glass-breccia, ridge south of Indian Peak. Andose. A 
glass showing crystals of olivine, augite, plagioclase, and magnetite. 
Analysis by Eakins, No. 1087. 
Si0 2 . 
ALA 
FeA 
FeO. 
MgO 
CaO. 
Na 2 
K 2 0. 
H 2 0. 
Ti0 2 
PA 
MnO 
51.81 
15. 24 
3.66 
4.86 
8.89 
9.06 
2.83 
2.08 
.67 
.77 
.18 
.08 
100. 13 
52.09 
17.84 
4.27 
4.56 
5.33 
8.03 
3. 39 
1.98 
1.77 
. 39 
.27 
.14 
100. 06 
52. 11 
L6.58 
3.66 
4. 99 
6.87 
6.43 
3.25 
3.20 
1.99 
.53 
.63 
.23 
100. 47 
53. 56 
16.07 
3.21 
5.29 
7.23 
8.77 
3.06 
1.94 
.19 
.68 
.18 
.11 
100. 29 
E. 
53.71 
18.00 
3.99 
4.05 
5.19 
6.88 
3.50 
3.10 
.55 
.74 
.38 
.24 
100. 33 
53. 89 
18 81 
4.92 
2.81 
3.29 
5.42 
3.65 
2.98 
2.99 
.49 
.52 
.17 
99.94 
