)LARKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
185 
F '« Q ,? rtZ ; baSalt ' °" e " half mUe south of Cinder Co » e , on border of 
ava held. Analysis by Hillebrand, No. 666. 
G. Quartz-basalt, west end of Lake Bidwell, on border of Cinder 
.one lava field. Contains a few grains of quartz, much olivine and 
plagioclase, less pyroxene, and a globulitic base. Analysis by Hille- 
jrand, No. 661. J 
H. Quartz-basalt, Silver Lake, near Lassen Peak. Contains occa- 
lonal grains of quartz, much feldspar and olivine, less pyroxene, and 
. brownish base. Analysis by Hillebrand, No. 662. 
I. Quartz-basalt, resting on dacite, near west base of Lassen Peak, 
i-nalysis by Hillebrand, No. 677. 
J. Quartz-basalt, island of Mitylene, coast of Asia Minor. Analvsis 
or comparison with the Cinder Cone series, by T. M. Chatard, record 
Rocks F to I dried at 100° to 110° before analysis. 
F. 
G. 
H. 
I. 
J. 
Si0 2 
54.56 
16.04 
.95 
6.07 
8.71 
8.89 
3.05 
1.18 
56.18 
16.59 
1.51 
5.51 
7.26 
7.64 
3.58 
1.47 
57.59 
16.49 
1.22 
4.89 
7.72 
7.40 
3.62 
.99 
56.51 
18.10 
4.26 
2.68 
4.52 
8.15 
3.23 
1.15 
56.58 
14.88 
2.31 
3.04 
3.76 
8.69 
3.36 
2.18 
.69 
1.43 
.77 
.15 
trace? 
.16 
A1 2 3 
Fe 2 3 
FeO 
MgO 
CaO 
Na^O 
K 2 
H 2 Oatl05° 
H 2 above 105° 
Ti0 2 
.28 
.53 
.18 
trace 
.17 
trace 
.03 
trace 
.42 
undet. 
undet. 
.86 
undet. 
undet, 
.69 
.48 
.14 
trace 
.11 
.04 
.04 
trace 
P 2 5 
Cr 2 3 j 
MnO 
undet. 
(?) 
(?) 
(?) 
undet. 
(?) 
(?) 
(?) 
SrO 
BaO 
.07 
Li 2 
C0 2 
2.32 
100. 64 
100. 16 
100. 78 
100. 10 
100. 39 
