156 ANALYSES OF ROCKS AND MINERALS, 1880-1908. 
F G. H I. 
59.43} 56.19 56. 78 
16.68 | 16.76 16. 86 
2.54 3.05 3. 56 
3. 48 4.18 2.93 
1.84 3.79 3.41 
4.09 6. 53 6. 57 
3.72 2. 53 3.19 
5.04 4. 46 3. 48 
+27 34 15 
72 - 66 1.21 
1. 38 - 69 1.15 
- 58 55 42 
SOB, |eseicicSecsclleiciewnme, 
trace -10 none 
trace | trace |........ 
.14 19 trace 
none | trace |........ 
aaa var are [ferns erga giz) 18 
905 cass ceeleeeecne. 
PEACE: | os cceininsicllarsisissisrece 
100. 04 | 100. 02 99. 89 
J. Amphibole gabbro, Beaver Creek, Big Trees quadrangle. Hessose. 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, Am. Jour. Sci., 4th ser., vol. 7, p. 294. 
