CLARKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
89 
K. Quartz-mica-diorite-porphyry. Contains biotite, hornblende, 
plagioclase, orthoclase, and quartz. Analysis by Whitfield, No. 830. 
L. Quartz-micar-diorite-porphyry. Contains quartz, biotite, plagio- 
clase, alkali-feldspar, and hornblende. Analysis by Whitfield, No. 830. 
M. Hornblende-porphyry; intrusive sheet. Contains hornblende, 
plagiocla'se, magnetite, and quartz. Analysis by Whitfield, No. 429. 
N. Hornblende-mica-porphyry; intrusive sheet. Contains horn- 
blende, plagioclase, biotite, magnetite, and quartz. Analysis by Whit- 
field, No. 420. The Indian Creek laccolith. 
O. Augite-andesite-porphyry; intrusive sheet, upper portion. Con- 
tains malacolite, plagioclase, probably orthoclase, magnetite, and little 
biotite, with secondary chlorite or serpentine and actinolite. Analysis 
by Whitfield, No. 830. 
P. Same sheet as O, lower portion. Analysis by W. F. Hillebrand, 
record No. 1571. Contains 0.04 V 2 3 . 
K. 
L. 
M. 
58.49 
16.70 
3.85 
2.37 
3.12 
5.90 
3.47 
1.59 
| 2.44 
1.71 
trace 
.24 
N. 
0. 
P. 
Si0 2 
65.97 
16.53 
2.59 
1.72 
2.11 
3.37 
3.41 
2.67 
| 1.23 
.42 
trace 
69.24 
15. 30 
1.72 
.69 
.95 
2.98 
4.46 
2.52 
| 1.30 
.65 
trace 
61. 50 
17.42 
4.66 
1.09 
1.26 
5.33 
3.99 
1.29 
1 2.44 
none 
.60 
trace 
52.10 
16.34 
3.84 
6.82 
4. 33 
4.73 
4.02 
4.20 
| 1.74 
.79 
.68 
trace 
50. 59 
1 1. 53 
1.83 
7.64 
11.27 
8.79 
2.27 
2. 33 
' .21 
1.76 
.80 
.48 
.17 
.06 
.03 
.10 
trace 
none 
trace 
A1 2 3 
Fe 2 3 
FeO 
MgO 
CaO 
Na 2 
K 2 
H 2 OatllO°... 
H 2 above 110° 
Ti0 2 
P 2 5 
MnO 
none trac.fi 
MO 
SrO 
BaO 
Li 2 
.09 
.13 
.09 
none 
.27 
trace 
.01 
.63 
.03 
.35 
. 13 
.22 
.24 
S0 3 
CI 
0=C1 
100. 33 
.02 
100. 08 
100. 52 
99.96 
100.18 
.05 
99.86 
100. 31 
100. 13 
