188 
CONTRIBUTIONS TO THE GEOLOGY OF MAINE, 
[BULL. 165. 
Analyses of rocks from northeast Maine. 
[Analyst, Dr. W. E. Hillebrand.] 
Constituent. 
Si0 2 
A1 2 3 
Fe 2 3 
FeO 
MgO 
CaO 
Na 2 
K 2 
H 2 O-105° 
H 2 O+105° 
Ti0 2 
Zr0 2 ...... 
Cr 2 3 
v 2 o 3 
NiO 
MnO 
BaO 
SrO 
Li 2 
PA 
C0 2 
CI 
Fl 
FeS 2 
Total 
I. 
ii. 
in. 
IV. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
75. 98 
72.77 
61.40 
49. 64 
12.34 
12.15 
16.59 
15. 07 
.85 
.44 
2.13 
1.66 
.93 
3.06 
3.05 
8.82 
.15 
.22 
2.73 
5.43 
.13 
.07 
6.17 
7.23 
4.02 
3.38 
3.83 
4.19 
4.44 
4.67 
1. 34 
.89 
.24 
.17 
.82 
.45 
.64 
.55 
.88 
2.81 
.17 
.20 
.79 
2.32 
.03 
.04 
None. 
None. 
? 
None. 
Trace. 
Trace. 
? 
? 
.02 
.04 
None. 
None. 
Trace. 
Trace. 
Trace? 
.16 
.13 
.25 
.07 
.03 
.02 
.02 
Trace? 
None. 
Trace. 
.05 
Trace? 
? 
Trace. 
Trace. 
.03 
Trace. 
.20 
.29 
None. 
2.06 
None. 
.32 
? 
? 
? 
? 
? 
? 
? 
? 
None. 
r(.067S) 
I .12 
None. 
r(.43S) 
I .79 
100. 02 
100. 09 
100. 10 
100. 27 
VI. 
Per <i. 
42. 25 
16.87 
5.24 
10.72 
6.91 
3.33 
3.96 
.77 
.43 
5. 58 
2.93 
None. 
.03 
.07 
.01 
.40 
Trace? 
None. 
Trace. 
.34 
None. 
? 
? 
( Trace S) 
Trace 
99.84 
Per ct. 
46.77 
14.91 
7.80 
4.90 
2.94 
6.30 
4.97 
2.37 
.92 
4.28 
2.31 
None. 
None. 
.02 
Trace. 
.29 
.04 
.03 
Trace. 
.98 
Trace? 
v 
Trace. 
(.036S) 
.07 
90 
VII. 
Per ct. 
31.42 
11.57 
2.37 
7.48 
5.32 
16.71 
2.26 
.74 
.76 
4.17 
2.30 
None. 
Trace. 
.06 
Trace. 
.38 
.64 
None. 
Trace. 
.46 
13.13 
? 
? 
(.0868) 
.16 
99.93 
VIII. 
Per ct. 
54.23 
7.38 
.54 
1.37 
3.29 
14. 65 
1. 65 
1.74 
.25 
1.22 
.28 
? 
? 
None. 
N. est. 
None. 
None. 
Trace. 
.07 
13.48 
? 
? 
100. 06 
I. Rhyolite, Haystack Mountain. 
II. Quartz-trachyte, Quoggy Joe Hill. 
III. Andesite, Edmunds Hill. 
IV. Diabase, Aroostook Falls. 
V. Diabase, Mars Hill. 
VI. Teschenite, near Mapleton Village. 
VII. Volcanic tuff, southeast base of Castle Hill. 
VIII. Calciferous sandstone, New Sweden Township. 
These analyses show that the igneous rocks of the district are of an 
alkaline type. The andesite (III) is of the ordinary plagioclastic char- 
acter, but the rocks more acid and those less acid than the andesites 
show an alkaline tendency. This is the most evident point in their 
regional affinity. 
