CLARKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
91 
F. Hornblende-mica-andesite. Contains plagioclase, hornblende, 
biotite, and magnetite. Analysis by Whitfield, No. 924. 
G. Hornblende-mica-andesite. Contains plagioclase, hornblende, and 
biotite. Analysis by Chatard, No. 712. 
H. Dacite. Conti^j^plagioclase, hornblende, biotite, and quartz. 
Analysis by Whitfiei T^o. 830. 
I. Dacite. Minerals as in H. Analysis by L. G. Eakins, record 
No. 1135. 
J. Andesite-breccia. 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. 
F. 
G. 
H. 
I. 
J. 
Si0 2 
64.27 
17.84 
3.36 
1.29 
2.00 
3.42 
3.84 
2.48 
| 1.32 
.32 
.16 
none 
65. 50 
14.94 
1.72 
2.27 
2.97 
2. 33 
5.46 
2.76 
.24 
1.13 
.45 
.09 
.20 
.13 
trace? 
65. 66 
15.61 
2.10 
2.07 
2.46 
3. 6.4 
3.65 
2.03 
| 1.07 
1.37 
trace 
none 
67.49 
16.18 
1.30 
1.22 
1.34 
2.68 
4.37 
2.40 
J- 2. 69 
.13 
.13 
.08 
67.95 
14.98 
2.33 
.95 
1.42 
3.98 
4.39 
2.^6 
.37 
.61 
.45 
.07 
.09 
.23 
trace? 
Al 2 O s 
Fe 2 O s 
FeO 
MgO 
CaO 
Na 2 
K 2 
H 2 Oatl05° 
H 2 above 105° 
Ti0 2 
P^O* 
MnO 
BaO 
SrO 
Li 2 
.03 
trace 
none 
.36 
.13 
.12 
so s 
.06 
.11 
CI 
100. 33 
100. 25 
100. 27 
100. 01 
100. 79 
