CLARKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
149 
K. Missourite, head of Shonkin Creek. Near belcherose. Described 
in Amer. Journ. Sci., 4th series, vol. 2, p. 315. Contains apatite, iron 
ore, olivine, biotite, augite, and leucite, the two latter being the chief 
minerals. Some zeolites and analcite are also present. E. B. Hurlbut, 
analyst. P. R. C. 356. 
L. Pseudo leucite-syenite, head of Shonkin Creek. Fergusose. 
Contains augite, olivine, biotite, iron ore, apatite, orthoclase, nephelite, 
zeolites, and traces of serpentine, limonite, and kaolin. Contains 
pseudomorphs after leucite. E. B. Hurlbut, analyst. 
M. Monzonite, Highwood Peak. Shoshonose. Contains augite, 
biotite, iron ore, apatite, plagioclase, and alkali feldspar. E. B. 
Hurlbut, analyst. 
N. Monzonite, Middle Peak. Borolanose. Contains augite, olivine, 
biotite, iron ore, apatite, plagioclase, and orthoclase. The two latter, 
with augite, are the chief minerals. E. B. Hurlbut, analyst. 
Si0 2 .. 
AL0 3 - 
Fe 2 3 - 
FeO.. 
MgO . 
CaO.. 
Na 2 0. 
K 2 0.. 
H 2 0.. 
Ti0 2 .. 
PA-- 
MnO. 
SrO.. 
BaO.. 
|0 3 .. 
EL... 
LessO 
40. 06 
10.01 
3.17 
5.61 
14.74 
10.55 
1.31 
5.14 
1.44 
.73 
.21 
trace 
.20 
.32 
.05 
.03 
99.57 
.01 
99.56 
51.75 
14.52 
5.08 
3.58 
4. 55 
7.04 
2.93 
7.61 
2.25 
.23 
.18 
trace 
.07 
. 30 
trace 
.05 
100. 14 
.01 
100. 13 
M. 
N. 
51.00 
17.21 
2.41 
4.23 
6.19 
9.15 
2.88 
4.93 
.63 
.13 
.33 
trace 
.14 
.34 
.03 
trace 
99. 60 
52. 05 
15.02 
2.65 
5.52 
5.39 
8.14 
3.17 
6.10 
.35 
.47 
.21 
trace 
.28 
.42 
.02 
.24 
100.03 
.06 
99.97 
