CLARKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
223 
K. Basalt, one mile east of the summit of the Cascade Range, on the 
road from Fort Klamath to Crater Lake, Described by J. S. Diller 
as a typical basalt, carrying- a considerable amount of hypersthene. 
Analysis by W. F. Hillebrand, record No. 408. 
Si0 2 .. 
A1 2 3 . 
Fe 2 3 
FeO.. 
MgO. 
CaO.. 
K 2 
H 2 Oat.llO°..._ 
H 2 above 110° 
Ti0 2 
PA 
NiO 
MnO 
SrO 
BaO 
Li 2 
CI 
60.98 
17.82 
1.83 
3.33 
2.76 
5.73 
4.26 
1.43 
.13 
.45 
.71 
.17 
none 
trace 
.05 
.06 
none 
trace 
ii. 
99.71 
62.09 
17.03 
2.38 
2.69 
3.08 
5.65 
4.10 
1.67 
.04 
.13 
.65 
.19 
none 
trace 
.07 
.07 
none 
trace? 
58.41 
17.85 
2.67 
3.29 
3.61 
6.81 
3.77 
1.23 
.34 
.86 
.69 
.24 
none 
trace 
.05 
.05 
trace 
trace 
99.84 
99.8- 
52.99 
16.71 
3.80 
3.55 
6.95 
8.49 
3.56 
1.29 
.18 
.59 
1.18 
.42 
.02 
trace 
.12 
.07 
none 
trace 
K. 
99.92 
57.47 
18.86 
2.21 
4. 08 
4.27 
7.42 
3. 85 
.73 
.22 
.75 
.24 
10 
11 
03 
100. 34 
4. ROCK FROM WILBUR, DOUGLAS COUNTY. 
A tuff partly of igneous, partly of organic, origin. The igneous 
matter contains a few grains of feldspar and augite, with particles of 
i rock like diabase. The organic remains are partly calcareous and 
ppartly siliceous. Description supplied by J. S. Diller. Analysis by 
E. N. Stokes, record No. 1737. 
Si0 2 ... 
Al 2 3 a 
Fe 2 3 -. 
MgO .. 
CaO... 
Na 2 . . 
K,0... 
55. 15 
9.75 
7.76 
2.22 
10.48 
1.00 
50 
H 2 OatllO° 2 7 
H 2 above 110° 
CO 
6.59 
3.64 
7<> 
a Includes Ti0 2 and 1\,0 5 if present. 
