CLARKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
23 
E. Diabase (basaltic glass), Mars Hill. Omose. Not resolvable 
into minerals. 
F. Rhyolite, Haystack Mountain. Liparose. Contains quartz, 
albite, and orthoclase, with sphene and accessory chlorite and kaolin. 
G. Volcanic tuff, southeast base of Castle Hill. Contains fragments 
of trachyte, andesite, devitrified glass, and lapilli. 
H. Diabase, Aroostook Falls, near Maine boundary line. Beer- 
hachose. Dike. Contains plag-ioclase, pyroxene, pyrite, apatite, 
chlorite, and a little caljcite. 
Si0 2 
ALA 
FeA 
FeO 
MgO 
CaO 
Na 2 
K 2 
H 2 at 105° . . . 
H 2 above 105 
Ti0 2 
PA 
Zr0 2 
Cr 2 3 
VA 
•FeS 2 
NiO 
MnO 
SrO 
BaO 
CO, 
42. 25 
16.87 
5.24 
10.72 
6.91 
3.33 
3.96 
.77 
.43 
5.58 
2.93 
.34 
none 
.03 
.07 
trace 
.01 
.40 
none 
trace? 
none 
99.84 
75. 98 
12.34 
.85 
.93 
.15 
.13 
4.02 
4.44 
.24 
.64 
.17 
.03 
.03 
(?) 
(?) 
none 
none 
trace ? 
trace ? 
.07 
none 
100. 02 
31.42 
11.57 
2.37 
7.48 
5.32 
16.71 
2.26 
.74 
.76 
4.17 
2.30 
.46 
none 
trace 
.06 
.16 
trace 
38 
none 
.64 
13.13 
99. 93 
49.64 
15. 07 
1.66 
8.82 
5.43 
7.23 
4.19 
.89 
.45 
2.81 
2.32 
.29 
none 
trace 
.04 
.79 
trace 
.25 
.05 
.02 
.32 
100. 27 
Traces of lithia present in all. CI and F not looked for. 
