CLARK K.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
29 
L. Basic segregation in diorite. Contains hornblende, augite, bio- 
tite, plagioclase, magnetite, apatite, zircon, and a little quartz. P. R. 
C. 1346. 
M. Diabase. Camptonose. Contains plagioclase, augite, and mag- 
netite. P. R. C. 1351. 
N. Camptonite. Oamptonose. Contains brown hornblende, plagio- 
clase, a little augite, olivine, magnetite, and apatite. P. R. C. 1350. 
O. Plryllite. Contains quartz, sericite, graphite?, magnetite, pyrite, 
rare orthoclase, plagioclase, sphene, and rutile. A quartz-sericite 
schist. P. R. C. 1352. 
P. Cordierite-microperthite-hornfels. Akerose. Contains biotite, 
quartz, red garnet, corundum, magnetite, iolite, microperthite, and 
rarely pleonaste. 
Q. Cordierite-hornfels. Contains quartz, biotite, pleonaste, corun- 
dum, iolite, magnetite, plagioclase, red garnet, and epidote?. 
SiO 
FeA 
FeO.. 
MgO . 
CaO.. 
Na 2 0. 
H 2 OatllO° 
H 2 above 110°. 
Ti0 2 
Zr0 2 
MnO 
Less 
L. 
55.28 
17.23 
1.54 
6.23 
2.69 
5.60 
5.42 
2.12 
.20 
.71 
1.64 
.73 
trace 
.24 
(NiCo)O (?) 
BaO ! .06 
C0 2 | .04 
C 
so 3 
CI 
F 
FeS 2 
none 
.07 
.28 
.07 
100. 15 
.13 
1.00. 02 
M. 
49.63 
14.40 
2.85 
8.06 
7.25 
9.28 
2.47 
.70 
.27 
1.47 
1.68 
.25 
trace? 
.17 
.04 
trace? 
1.36 
N. 
none 
.07 
trace 
.22 
100. 17 
.02 
loo. L5 
48.22 
14.27 
2.46 
9.00 
6.24 
8.45 
2.90 
1. 93 
.28 
1.66 
2.79 
.64 
.03 
.20 
.03 
.04 
.15 
none 
.10 
.05 
.36 
99. 80 
.04 
99.76 
0. 
90. 91 
4.18 
.22 
1.27 
.37 
.22 
. 77 
.58 
.06 
.74 
.28 
.05 
.02 
trace 
none 
trace 
.18 
.10 
none 
trace 
.11 
100. 06 
58. 35 
21.30 
.03 
6.41 
2.10 
.85 
1.60 
5.63 
.31 
.86 
.87 
.18 
none 
.13 
.03 
.05 
.40 
none 
.03 
(?) 
. 58 
99.71 
45. 30 
30. 51 
.24 
8.80 
3.11 
.90 
1.65 
4.84 
.26 
1.05 
1.48 
.12 
none 
.20 
.02 
.03 
.17 
.04 
.04 
.04 
1.07 
99.87 
