CLARKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
65 
F. Green schist, sec. 34, T. 48 N., R. 27 W., near center of section. 
Contains plagioclase, chlorite, and quartz. Analysis by George Stei- 
ger, record No. 1447. P. R. C. 986. 
G. Sericite-schist associated with the preceding. Mainly sericite 
and quartz. Analysis by Steiger, No. 1447. P. R. C. 985. 
H. Dark-gray, foliated schist, SE. corner of sec 30, T. 47 N., R. 
30 W. Contains quartz, plagioclase, orthoclaso. and biotite. Analysis 
y Steiger, No. 1525. P. R. C. 991. 
I. Schistose gneiss, NW. i of sec. 35, T. 47 N., R. 26 W. Contains 
quartz, kaolin, sericite, plagioclase, chlorite, magnetite, and apatite. 
Analysis by Steiger, No. 1525. 
J. Novaculite from Marquette. Described by Williams in Bull. 62. 
Contains quartz and sericite. Analysis by W. F. Hillebrand, record 
No. 759. 
Si0 2 .. 
A1A- 
Fe 2 3 
FeO.. 
MgO . 
CaO.. 
K 2 
H 2 Oatl00°.... 
H 2 above 100° 
Ti0 2 
PA 
MnO 
Li 2 
C0 2 
61.35 
16. 45 
.94 
4.20 
3.12 
3.46 
5.24 
1.05 
.10 
2.51 
.26 
.18 
1.98 
•100. 84 
G. 
70.76 
14.83 
1.46 
3.09 
1.99 
.36 
.47 
3.50 
.09 
2.70 
.33 
.26 
99.84 
63. 50 
17.89 
1.12 
5.38 
1.22 
2.34 
2.55 
2.43 
.22 
2.04 
.62 
.19 
trace 
99.50 
82.38 
11.32 
.97 
.26 
.17 
.22 
.59 
1.04 
.18 
2.33 
. 14 
.09 
none 
99.69 
76.99 
13.92 
.45 
.77 
1.12 
.32 
.56 
3.65 
2.35 
trace 
trace 
trace 
100. 13 
Bull. 168- 
