ANALYSES. 
IGNEOUS AND CRYSTALLINE 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. Contains quartz, orthoclase, albite, and magnetite, with 
siderite, kaolin, and chlorite. 
B. Teschenite, Mapleton Township. In dikes cutting shales. Con- 
tains andesine, augite, biotite, apatite, analcite, and magnetite. 
C. Andesite, Edmunds Hill, Chapman Township. Contains labra- 
Sorite, orthoclase, pyroxene, apatite, and magnetite. 
D. Calcif erous sandstone, New Sweden Township. Contains calcite, 
Ikali, feldspar, quartz, magnetite, muscovite, and siderite. Included 
lere because studied as one of the group. 
Si0 2 . 
ALO, 
Fe 2 3 . 
FeO.. 
MgO . 
CaO.. 
Xa.,0 . 
K,0 
H,0 at 105°... 
H 2 above 105 c 
Ti0 2 
P 2 5 
Zr0 2 
Cr 2 3 
VA 
FeS 2 
NiO 
MnO 
SrO 
BaO 
CO, 
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. 
46.77 
14.91 
7.80 
4.90 
2.94 
6.30 
4.97 
2.37 
.92 
4.28 
2.31 
.98 
none 
none 
.02 
.07 
trace 
.29 
.03 
.04 
trace? 
1.90 
61.40 
16. 59 
2.13 
3.05 
2.73 
6.17 
3.83 
1.34 
.82 
.88 
.79 
.20 
none 
trace 
.02 
none 
trace 
.13 
trace? 
.02 
none 
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. 10 
100. 06 
Traces of lithia present in all. F and CI not looked for. 
1!) 
