LAKKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
207 
12. MARIPOSA COUNTY. 
Rocks collected by H. W. Turner, and partly described in his papers 
I the 14th and 17th Annuals. Additional data supplied by Turner. 
A. Soda-granulite or aplite, about 4 miles west of Mariposa. See 
7th Ann., Part I, p. 721. Contains plagioclase (albite?) and micro- 
•egmatite, with less epidote, quartz, sphene, and apatite. Analyses 
y W. F. Hillebrand, record No. 1461. P. R. C. 748. 
B. Micropegmatite, Agua Fria Creek. See 17th Ann., Part I, p. 
91. Contains quartz, plagioclase, brown mica, epidote, and a little 
•on ore. Analysis by Hillebrand, No. 1461. P. R. C. 746. 
C. Soda-granite-porphyry, Merced River, below the mouth of the 
orth fork. Published in 17th Ann. Contains feldspar, largely albite, 
ornblende, muscovite, abundant epidote, apatite, and a little iron ore. 
nalysis by George Steiger, record No. 1573. P. R. C. 774. 
D. Granite-porphyry, about one-fourth of a mile north of Lake 
enaya, Yosemite National Park. See 14th and 17th Annuals. Con- 
ins orthoclase, quartz, plagioclase, and biotite, with a little iron ore 
id sphene. Analysis by Hillebrand, record No. 1432. P. R. C. 726. 
E. Granite, west of Lake Tenaya, Yosemite National Park. See 
:th and 17th Annuals. Contains quartz, orthoclase, plagioclase, and 
otite, with some hornblende, iron ore, sphene, and apatite. Analysis 
t Hillebrand, No. 1432. P. R. C. 725. 
Si0 2 .. 
Ai,0 3 . 
Fe 2 3 
FeO.. 
MgO . 
CaO.. 
Na 2 0. 
H 2 OatllO°.__. 
H 2 above 110 c 
Ti0 2 
PA 
MnO 
SrO 
BaO 
Li 2 
C0 9 
A. 
74.21 
14.47 
.35 
.50 
.28 
1.71 
7.62 
.10 
.15 
.23 
.30 
.07 
none 
trace 
none 
trace 
73.18 
13. 66 
.21 
2.24 
.93 
2.10 
3.70 
2. 72 
.10 
. 57 
.25 
.09 
.07 
trace 
.10 
trace 
.17 
99.99 
100.09 
71.88 
15. 57 
1.07 
.30 
.68 
2. 03 
5.81 
1.80 
.11 
.68 
.17 
.08 
none 
.08 
.02 
none 
none 
100. 28 
72.48 
L4.06 
.89 
1.05 
.62 
2.17 
3.30 
4.75 
.16 
.35 
.28 
.09 
trace 
trace 
.08 
trace 
66.28 
16.03 
1 . 80 
I . ss 
1.12 
3. 75 
4. 10 
3.49 
.10 
.39 
.54 
.30 
.05 
trace 
.08 
trace 
100. 28 
<»<).!)] 
