CLARKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
201 
4. MISCELLANEOUS ROCKS. 
A, B, C, D. Mica-basalt, Santa Maria Basin. See Iddings, Bull. 
Phil. Soc. Washington, vol. 12, p. 212. Not fully described. Analy- 
ses by W. F. Hillebrand, record No. 1261. 
A. Auvergnose. 
B, C, D. Monzonose. 
E. Hornblende-porphyrite, Sierra Carrizo. Dacose. Described by 
Cross, 11th Ann., p. 165. Contains plagioclase and hornblende, in a 
groundmass of quartz and orthoclase. Analysis by Hillebrand, No. 
1129. 
E. 
gi0 2 
A1 2 0, 
FeA 
FeO 
MgO 
CaO 
Na 2 
K 2 
H 2 at 100° 
B 2 above 100° 
Ti0 2 
PA 
MnO 
MO, CoO 
SrO 
BaO.. 
LLO 
49. 36 
16.35 
2.93 
8. 55 
7.06 
10.08 
2.67 
.82 
.22 
.65 
.98 
.30 
.19 
.05 
none 
.04 
none 
100. 25 
55.35 
12. 91 
4.67 
2.06 
6.29 
5.77 
2.65 
4.86 
2.67 
1.18 
.87 
.58 
.08 
.05 
trace 
.19 
trace 
57.04 
13. 66 
4.96 
1.77 
4.43 
6.23 
3.08 
4.95 
1.11 
1.10 
.94 
.63 
.17 
.07 
trace 
.22 
trace? 
57. 48 
14. 09 
5.21 
1.35 
3.49 
6. 05 
3.00 
4.69 
1.20 
1.37 
.94 
.65 
.09 
.08 
trace 
.23 
none 
63. 18 
16. 47 
2.36 
2.28 
1. 33 
4.77 
4.40 
2.93 
.27 
.60 
.60 
.28 
.15 
.09 
.15 
trace 
99.98 
100. 36 
99.92 
'.Ml. 
