148 
ANALYSES OF ROCKS, U. S. GEOLOGICAL SURVEY. 
[no. 228. 
F. Syenite, top of Palisade Butte. Borolcmose. Contains augite, 
iron ore, apatite, alkali feldspar, a little biotite, some limonite in 
cracks, much natrolite, and possibty other zeolites. H. W. Foote, 
analyst. 
G. Leucite-syenite, head of Davis Creek. Shonkinose. Contains 
augite, iron ore, olivine, biotite, apatite, alkali feldspar, leucite, and 
some zeolites, with traces of limonite and serpentine. E. B. Hurlbut, 
analyst. 
H. Monchiquite, dike east side of Highwood Gap. 3fonchiquose. 
Contains augite, olivine, biotite, iron ore, apatite, and analcite, with 
some serpentine and a little kaolin. H. W. Foote, analyst. 
I. Leucite-basalt, saddle between Highwood and Pinewood peaks. 
Shonkinose. Contains augite, iron ore, leucite, apatite, altered olivine, 
chlorite, calcite, and zeolites. H. W. Foote, analyst. 
J. Leucite-basalt or leucite-monchiquite, dike on Arrow Peak. JYear 
kamerwiose. Phenociysts of augite, olivine, and biotite, with some 
leucite, in a groundmass of the same minerals. Also analcite, iron 
ore, and apatite. H. W. Foote, analyst. 
Si0 2 .. 
A1A- 
Fe 2 3 
FeO.. 
MgO. 
CaO.. 
Na 2 0. 
K 2 0.. 
H 2 0.. 
Ti0 2 . 
P 2 5 . 
MnO. 
SrO.. 
BaO.. 
so 3 .. 
co 2 .. 
01.... 
Less O . 
50.11 
17.13 
3.73 
3.28 
2.17 
5.09 
3.72 
7.47 
4.47 
.82 
.67 
trace 
.35 
.63 
.08 
07 
100. 09 
.02 
100. 07 
19.59 
14.51 
3.51 
5.53 
6.17 
9. 04 
3.52 
5.60 
1.95 
.36 
.15 
trace 
.21 
.49 
.02 
L3 
100. 78 
.03 
100. 75 
47.82 
13.56 
4.73 
4.54 
7.49 
8.91 
4.37 
3.23 
3.37 
.67 
1.10 
trace 
.21 
.16 
trace 
.04 
100. 20 
.01 
100. 19 
47.98 
13.34 
4.09 
4.24 
7.01 
9.32 
3.51 
5.00 
2.10 
.58 
1.03 
trace 
.14 
.50 
trace 
1.24 
.21 
100. 29 
.07 
100. 22 
J. 
46.04 
12.23 
3.86 
4.60 
10.38 
8.97 
2.42 
5.77 
2.87 
.64 
1.14 
trace 
.25 
.48 
trace 
II 
99. 76 
.03 
99. 73 
