CLARKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
69 
N. Adinole, sec. .8, T. 43 N., R. 31 W., near Mansfield. Contains 
actinolite, albite, quartz, some chlorite, and epidote. Analysis by 
George Steiger, record No. 1709. 
O. Spilosite. Contains quartz, feldspar, chlorite, epidote, and a 
little biotite. 
P. Spilosite. Contains quartz, feldspar., actinolite, and epidote. 
Analyses O and P by H. N. Stokes, record No. 1617. These three 
rocks are contact derivatives of the Mansfield clay slate, q. v. 
N. 
0. 
p. 
Si0 9 
74.16 
11. 85 
.82 
1.66 
2.10 
2.10 
6.57 
.15 
.05 
.52 
.37 
.08 
.06 
none 
none 
52. 51 
19.00 
3.31 
7.19 
3.29 
1. 55 
6.72 
.70 
.34 
3.26 
1.70 
.15 
trace 
trace 
trace 
57.77 
19.33 
1.29 
3.37 
4.35 
1.71 
8.22 
.22 
.18 
2.34 
.92 
.04 
trace 
trace 
none 
.02 
none 
none 
ALOo 
Fe 2 3 
FeO 
MgO 
CaO 
Na 2 
K 2 
H 2 at 110° 
H 2 above 110° 
Ti0 2 
P 2 5 
MnO 
SrO 
BaO o 
V,0, 
LijO 
trace 
none 
C0 2 
.09 
.18 
c 
F 
trace 
none 
100. 76 
99.72 
99.76 
