IGNEOUS AM) CRYSTALLINE BOCKS. 
ARIZONA. 
173 
A. B, C. D. Mica-basalt, Santa Maria Basin. See [ddings, Bull. 
Phil. Soc. Washington, vol. 12, p. 212. Nol fully described. Analy- 
ses by W. F. Hillebrand, record No. L261. 
E. Hornblende-porphyrite, Sierra Carrizo. Described by Cross, 
14th Ann., p. 165. Contains plagioclase and hornblende, in a ground- 
niass of quartz and orthoclase. Analysis by Hillebrand, No. L429. 
8iO, 
FeA 
FeO 
MgO 
CaO 
Xa/> 
k\0 
H 2 at 100° 
H 2 above 100 c 
Ti0 2 
PA 
Mho 
NiO, OoO 
8rO 
BaO 
49. 36 
16.35 
2.93 
7.06 
10.08 
2. 67 
.82 
.22 
.65 
.98 
.30 
.19 
.05 
none 
.04 
none 
B. 
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 
99.98 
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? 
100. 36 
D. 
57. 18 
L4.09 
5.21 
1 . 35 
:;. 19 
6.05 
3. 00 
4.69 
1.20 
1.37 
.94 
.65 
.09 
.08 
trace 
.23 
none 
99.92 
63. L8 
16.47 
2. 28 
1.33 
1.77 
4.40 
2.93 
60 
28 
15 
.09 
.15 
trace 
