ANALYSES. 
IG1STEOUS AND CRYSTALLIKE ROCKS. 
MAINE. 
1. ROCKS FROM AROOSTOOK COUNTY. 
Described by H. E. Gregory in Bull. 165. Analyses by W. F. 
Hillebrand, record No. 1795. 
A. Quartz-trachyte (bostonite), Quoggy Joe Mountain, Presque Isle 
Township. Liparose. Contains quartz, orthoclase, albite, and mag- 
netite, with siderite, kaolin, and chlorite. 
B. Teschenite, Mapleton Township. Akerose. In dikes cutting 
shales. Contains andesine, augite, biotite, apatite, analcite, and 
magnetite. 
C. Andesite, Edmunds Hill, Chapman Township. Tonalose. Con- 
tains labradorite, orthoclase, pyroxene, apatite, and magnetite. 
D. Calcif erous sandstone, New Sweden Township. Contains calcite, 
alkali feldspar, quartz, magnetite, muscovite, and siderite. Included 
here because studied as one of the group. 
Si0 2 _. 
ALA- 
Fe 2 3 
FeO.. 
MgO . 
CaO_. 
Na 9 0. 
A. 
H 2 Oatl05°_... 
H 2 above 105° 
TiO, 
Zr0 2 . 
Cr 2 3 . 
V 2 3 . 
FeS 2 . 
NiO.. 
MnO. 
SrO_. 
BaO 
CO, . . 
72.77 
12.15 
.44 
3.06 
.22 
.07 
3.38 
4.67 
.17 
.55 
.20 
trace 
.04 
none 
(?) 
.12 
none 
.16 
none 
.03 
2.06 
100.09 
B. 
c. 
46.77 
61.40 
14.91 
16.59 
7.80 
2.13 
4.90 
3.05 
2.94 
2.73 
6.30 
6.17 
4.97 
3. 83 
2.37 
1.34 
.92 
.82 
4.28 
.88 
2.31 
.79 
.98 
.20 
none 
none 
none 
trace 
.02 
.02 
.07 
none 
trace 
trace 
.29 
.13 
.03 
trace? 
.04 
.02 
trace? 
none 
99.90 
100. 10 
54.23 
7.38 
.54 
1.37 
3.29 
14.56 
1.65 
1.74 
.25 
1.22 
.28 
.07 
(?) 
(?) 
(?) 
(?) 
none 
undet. 
none 
none 
13. 48 
100. 06 
Traces of lithia present in all. 
22 
F and CI not looked for. 
