158 ANALYSES OF ROCKS AND MINERALS, 1880—1908. 
ie) 
2 
q 
66.83 | 71.08 35. 64 
15.24 | 15.90 18. 62 
2.73 - 62 5.54 
1. 66 1.31 14. 60 
1.63 54 9.72 
3.59 2. 60 90 
3.10 3.54 - 38 
4. 46 4.08 9. 22 
none | none = 48 
- 56 30 2.54 
-54 +22 1.12 
18 -10 . 20 
04 £08 |aveesnsis 
10 +15 79 
03 02 | sicivre shanty 
11 04 trace 
I. Amphibole picrite, near Sequoia post-office, Yosemite National Park. Uval- 
dose. Collected by Turner, but not described. Analysis by George Steiger, record 
No. 1884. 
J. Amphibole-pyroxene rock, perknite, 3 miles northeast of Coulterville. SR. 
2 of sec. 20f minnesotase. Described by Turmer in Jour. Geology, vol. 9, p.508. Analy- 
sis by George Steiger, record No. 1860. Contains pyroxene and amphibole, with a 
little quartz and pyrrhotite. 
K. Amphibole separated from quartz monzonite, Tioga road, southeast of Mount 
Hoffman. Sp. gr., 3.203, 2.15°. 
L. Mica separated from the same rock asI. Sp. gr., 3.05, 21°. 
Analyses K and L by W. F. Hillebrand, record No. 1774. 
Samples K and L are described by Turner in Am. Jour. Sci., 4th ser., vol. 7, p. 294. 
13.01 | 11.92 7 
69 -75 32 
48 49 9,19 
trace | none 03 
090) || se saezc.sl emis scaciis 
S28 || sarcisrseacast sia os cot 
sthialeictelore -04 05 
eisieconst none trace 
none 51 
eee 02 02 
none | none 12 
cay tis none | (?) 
ais Sabie! trace |........ 
DONG | sisisieie eel cacsisiasince 
srorste tts ial . 06 7 
100.06 | 100.05 99.90 
45 < 02 
99 61 | 100,03 99. 83 
