CLARKE.] 
IGNEOUS AND CRYSTALLINE EOCKS. 
209 
K. Quartz-mica-diorite, Chowchilla River. See 17th Ann., Part I, p. 
691. Contains plagioclase, quartz, a little orthoclase (?), brown mica, 
hornblende, rather abundant apatite, a little iron ore; one zircon-like 
crystal was noted. Analysis by W. F. Hillebrand, record No. 1461. 
P. R. C. 745. 
L. Quartz-mica-diorite, Yaqui Creek. For the Educational Series 
of Rocks. Contains plagioclase, quartz, biotite, hornblende, a little 
pyroxene, iron ore, and apatite. Analysis by George Steiger, record 
No. 1643. P. R. C. 135. Described by Turner in Bull. 150, p. 339. 
M. Diabase, dike li miles northeast of Hornitos. See 17th Ann., 
Part I, p. 694. Contains plagioclase, partly labradorite, augite, brown 
hornblende, and iron ore. Analysis by Hillebrand, No. 1461s P. R. C. 
750. 
N. Igneous rock, near Cathay Hill. See 17th Ann., Part I, p. 694. 
Contains two minerals unidentified; neither is olivine. Analysis by 
Hillebrand, No. 1461. P. R. C. 749. 
K. 
L. 
M. 
N. 
Si0 2 
62.62 
17.51 
.49 
4.06 
2.84 
5.49 
3.49 
1.76 
.22 
.92 
.55 
.12 
58.09 
17.46 
1.12 
5.08 
4.06 
6.24 
2.94 
2.02 
.29 
1.45 
.95 
.17 
51. 32 
15.28 
.47 
8.59 
7.25 
11.58 
2.92 
.22 
.06 
.95 
1.23 
.25 
47.75 
10.56 
.74 
8.34 
19.09 
9.62 
1.32 
.12 
.05 
2.06 
.37 
.03 
.24 
.07 
.10 
trace 
none 
trace 
A1 2 3 
Fe 2 3 
FeO 
MgO 
CaO 
Na 2 
K 2 
H 2 at 110° 
H 2 above 110° 
Ti0 2 
P,0, 
0,0, 
NiO 
MnO 
.05 
trace 
trace 
trace 
none 
.04 
.07 
none 
.21 
.05 
.02 
trace 
.11 
.16 
trace 
none 
trace 
SrO 
BaO 
Li 2 
C0 2 
so s 
CI 
F .. 
c 
100. 12 
100. 37 
100. 28 
100. 46 
Bull. 168 14 
