CLARKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
107 
F. Ilornblencle-mica-andesite. Yellowstonose. Contains plagio- 
clase, hornblende, biotite, and magnetite. Analysis by Whitfield, 
No. 924. 
G. Hornblende-mica-andesite. Dacose. Contains plagioclase, horn- 
blende, and biotite. Analysis by Chatard, No. 712. 
H. Dacite. Yellowstonose. Contains plagioclase, hornblende, bio- 
tite, and quartz. Analysis by Whitfield, No. 830. 
I. Dacite. Lassenose. Minerals as in H. Analysis by L. G. Eakins, 
record No. 1135. 
J*. Andesite-breccia. Lassenose. Not in paper cited. See Mon. 
XXXII, Pt. II. Analysis by Chatard, No. 712. Reported by Iddings 
as hornblende-mica-andesite, containing hornblende, plagioclase, 
quartz, biotite, and a little magnetite. 
Si0 2 
A1A 
Fe 2 3 
FeO 
MgO 
CaO 
Na,0 
K 2 
H 2 at 105 c 
Ti0 2 . 
P 2 5 
MnO 
BaO. 
SrO. 
Li 2 
so 3 . 
CI... 
64.27 
17. 84 
3. 36 
1.29 
2.00 
3.42 
3.84 
2.48 
1.32 
.32 
.16 
none 
.03 
trace 
none 
100. 33 
65. 50 
14.94 
1.72 
2.27 
2.97 
2.33 
5.46 
2.76 
.24 
1.13 
.45 
.09 
.20 
.13 
trace? 
06 
100. 25 
15.61 
2.10 
2.07 
2.46 
3.64 
3.65 
2.03 
1.07 
1.37 
trace 
none 
.36 
.13 
.12 
100. 27 
67.49 
16.18 
1.30 
1.22 
1.34 
2.68 
4.37 
2.40 
2.69 
.13 
.13 
100. 01 
J. 
67.95 
14.98 
2.33 
.95 
1.42 
3.98 
4.39 
2.86 
.37 
.61 
.45 
.07 
.09 
.23 
trace? 
.11 
100. 79 
