CLABKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
95 
2d. SUNLIGHT [NTRUSIVES. 
Descriptions, hitherto unpublished, supplied by Arnold Hague and 
T. A. Jaggar, jr. Analyses A, B, and C by W. F. Hillebrand, record 
No. 1801; D by H. N. Stokes, No. 1804. 
A. Quartz-syenite, Copper Creek Basin. Contains biotite, horn- 
blende, epidote, orthoclase, augite, titanite, magnetite, and apatite. 
Hornblende very pale in color. 
B. S}<enite-porphyry, Sulphur Creek Basin. Contains oligoclase 
and biotite, in a groundrnass of quartz and feldspar. 
C. Augite-syenite-porphyry, Copper Creek Basin. Contains augite, 
biotite, orthoclase, a little hornblende, and quartz. 
D. Gabbro, southwest of Beams Hill, Sunlight Valley. Contains 
plagioclase, pyroxene, magnetite, apatite, and a little biotite. 
Si0 2 
A1A 
Fe 2 3 
FeO 
MgO 
CaO 
Na 2 
K 2 
H 2 OatllO°... 
H 2 above 110 
Ti0 2 
PA 
Zr0 2 
Cr 2 3 
VA 
NiO 
MnO 
SrO 
BaO 
Li 2 
co 2 
FeS 2 .; 
A. 
63. 07 
17.47 
2.09 
1.38 
1.44 
2.27 
5.77 
4.59 
.25 
.43 
.38 
.18 
trace 
trace 
trace 
none 
.03 
.15 
.32 
trace? 
none 
.02 
99.84 
p.. 
66.64 
16.22 
1.84 
1.06 
1.25 
2.41 
5.11 
3.86 
.52 
.55 
.29 
.16 
.01 
trace 
.01 
none 
trace 
.14 
.27 
none 
none 
trace? 
100. 34 
64.40 
16.90 
1.86 
1.37 
1.13 
2.60 
5.79 
4.56 
.16 
.39 
.23 
.21 
.02 
none 
.07 
.14 
.27 
trace 
none 
trace? 
100. 10 
53.57 
17. 78 
3.19 
4.93 
4.36 
6.22 
4.04 
3.04 
.27 
.80 
.89 
.44 
none 
.07 
.13 
.21 
trace 
none 
99.94 
