IGNEOUS AND CRYSTALLINE ROCJKS. 
m ( .) 
MISCELLANEOUS ROCKS. SECOND GROUP. 
Collected and investigated by Arnold Hague and J. P. [ddings. 
A. Pyroxene-andesite, west of Dunraven Peak. Analysis by F. A. 
Gooch, record No. 116, hitherto unpublished. Reported by Lddingsas 
containing labradorite, augite, hypersthene, and magnetite, in a micro- 
lit ie groundmass. 
B. Basalt, southwest of Dunraven Peak. Analysis by Gooch, No. 
118, hitherto unpublished. Reported by Iddings aj containing augite, 
olivine, labradorite- by townite, and magnetite v in a globulitic glassy 
groundmass. 
C. Basalt, north spur of Prospect Peak. Analysis by J. E. Whit- 
field, record No. 431, hitherto unpublished. Reported by lddingsas 
containing labradorite, augite, olivine, and magnetite. Little glass in 
groundmass. 
D. Basalt, Yellowstone Canyon. Analysis by Whitfield, No. 430, 
hitherto unpublished. Reported b}^ Iddings as containing labradorite- 
by townite, augite, olivine, magnetite, and a little brown glass. 
E. Basalt, Stinkingwater Canyon. See Iddings, Bull. Phil. Soc. 
Washington, vol. 12, p. 205. Analysis by W. H. Melville, record No. 
1232. 
A. 
B. 
C. 
D. 
E. 
SiO,. 
56.47 
15. 33 
2.54 
4. 53 
5.08 
6.93 
3.81 
1.66 
I 1.65 
.99 
.54 
51. 70 
15. 18 
2.09 
8.54 
8.18 
8.73 
2.31 
1.81 
} ■» 
1.24 
.21 
47.17 
17.85 
7.42 
1.18 
6.54 
10.12 
2.94 
.56 
| .65 
2. 13 
.20 
3. 26 
none 
51. 70 
17.90 
7.24 
1.00 
2.77 
6.94 
4.17 
1.62 
}, 15 
3. 17 
.41 
1.81 
trace 
52.37 
16. 57 
6.34 
2. 35 
5.27 
8.54 
2.99 
2.45 
1.18 
1.04 
. 73 
.31 
A1 2 3 
Fe 2 3 
' FeO 
MgO 
CaO 
Na 2 
K 2 
H 2 Oatl00° 
H 2 above 100° 
Ti0 2 
P 2 5 
Fe, metal 
MnO 
.18 
trace 
.07 
.12 
NiO 
Li 2 . 
.02 
.51 
.03 
.32 
so 8 
8 
.09 
trace 
CI 
100. 55 
99.71 
100. 24 
Uio.23 
li in. :;:; 
