CLARKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
239 
J. Amphibole-gabbro, Beaver Greek, Big Trees quadrangle. Jless- 
ose. Contains labradorite and amphibole, with a little pyrite and 
pyrrhotite. Analysis by H. N. Stokes, record No. 1752. 
K. Amphibole separated from J. Analysis by William Valentine, 
record No. 1733. 
L. Olivine-gabbro, just east of south end of Phoenix reservoir. 
Corsose. Contains plagioclase, a few grains of alkali feldspar, augite, 
rhombic pyroxene, amphibole, olivine, magnetite, and iron sulphide, 
with a little secondary chlorite and epidote. Analysis by H. N. Stokes, 
record No. 1750. 
For description of J and K see Turner, Amer. Jour. Sci., 4th series, 
vol. 7, p. 294. The description of L is hitherto unpublished. 
Si0 2 
Fe 2 3 
FeO 
MgO 
CaO 
Na 2 
K 2 
H,Oatll0°... 
H 2 above 110 c 
Ti0 2 .... 
P 2 5 
VA 
MnO 
SrO . 
Li 2 
C0 2 . 
FeS 2 . 
CI... 
47.27 
20.82 
1.85 
4.26 
6.44 
13.02 
2.75 
.22 
.08 
1.27 
.92 
.74 
.02 
trace 
trace 
trace 
none 
.20 
trace 
46.08 
10.52 
2.81 
8.30 
14.40 
12.64 
1.62 
.34 
.17 
1.97 
.77 
.18 
.04 
15 
99.99 
L. 
43.41 
23.15 
3.72 
4.39 
7.65 
14.27 
.82 
.22 
.18 
1.53 
.39 
.02 
none 
.08 
trace 
.10 
.14 
trace 
100. 07 
