CLARKE.] 
IGNEOUS AND CRYSTALLINE ROOKS. 
105 
K. Quartz-mica-diorite-porphyry. Yellowstonose. Contains biotite, 
hornblende, plagioclase, orthoclase, and quartz. Analysis by Whit- 
Held, No. 830. 
L. Quartz-mica-diorite-porphyry. Lassenose. Contains quartz, 
biotite, plagioclase, alkali feldspar, and hornblende. Analysis by 
Whitfield, No. 830. 
M. Hornblende-porphyry. Tonalose. Intrusive sheet. Contains 
hornblende, plagioclase, magnetite, and quartz. Analysis by Whit- 
field, No. 429. 
N. Hornblende-mica-porphyry. Yellowstonose. Intrusive sheet. 
Contains hornblende, plagioclase, biotite, magnetite, and quartz. 
Analysis by Whitfield, No. 420. The Indian Creek laccolith. 
O. Augite-andesite-porphyry. Monzonose. Intrusive sheet, upper 
portion. Contains malacolite, plagioclase, probably orthoclase, mag- 
netite, and little biotite, with secondary chlorite or serpentine and 
actinolite. Analysis by Whitfield, No. 830. 
P. Same sheet as O, lower portion. Kentallenose. Analysis by 
W. F. Hillebrand, record No. 1571. 
Si0 2 . . 
A1A- 
Fe 2 3 
FeO.. 
MgO. 
CaO.. 
Na 2 0. 
K 2 0.. 
H 2 above 110 c 
Ti0 2 
MnO 
NiO. 
SrO. 
BaO. 
Li 2 G 
VA 
so 3 . 
01... 
0=C1 
K. 
65. 97 
16.53 
2.59 
1.72 
2.11 
3. 37 
3.41 
2.67 
1.23 
.42 
trace 
none 
09 
13 
09 
100. 33 
.02 
100.31 
69. 24 
15. 30 
1.72 
.69 
.95 
2.98 
4.46 
2.52 
1.30 
.65 
trace 
trace 
.27 
trace 
100. 08 
M. 
58. 49 
16. 70 
3.85 
2.37 
3.12 
5.90 
3.47 
1.59 
2.44 
1.71 
trace 
.24 
N. 
01 
.63 
100. 52 
61.50 
17.42 
4.66 
1.09 
1.26 
5. 33 
3. 99 
1.29 
2.44 
none 
.60 
trace 
03 
35 
99.96 
o. 
52.10 
16.34 
3.84 
6.82 
4. 33 
4.73 
4.02 
4.20 
1.74 
.79 
.68 
trace 
i:; 
22 
24 
100.18 
.05 
100.13 
50. 59 
11.49 
1.83 
7.64 
11.27 
8.79 
2.27 
2.33 
.21 
1.76 
.80 
.48 
.17 
.06 
.03 
.10 
trace 
.04 
none 
trace 
99.86 
