CLARKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
37 
C. Pyroxenic anorthosite, Elizabeth town. Contains largely labra- 
dorite, subordinate light-green augite, less brown hornblende, and a 
little magnetite. 
D. Norite, with close affinity to gabbro. Intrusion in C. Contains 
labradorite, hypersthene, garnets, green augite, brown hornblende, a 
little brown biotite, magnetite, and apatite. 
E. Diabasic norite or gabbro, Elizabeth town. Contains the same 
minerals as D. 
F. Gneissoid derivative, by pressure, of E. The same minerals, 
but with hornblende more abundant. 
G. Gabbro, wall rock of Split Rock mine. Contains augite, hyper- 
sthene, brown hornblende, garnet, plagioclase, magnetite, and possibly 
spinel. 
c. 
D. 
E. 
F. 
G. 
Si0 2 
56.94 
20.82 
.83 
3.02 
2.36 
9.41 
3.36 
1.58 
.21 
.59 
.44 
.07 
(?) 
trace 
.11 
.05 
.45 
trace 
47.16 
14.45 
1.61 
13.81 
5.24 
8.13 
3.09 
1.20 
.12 
.48 
3.37 
.57 
(?) 
.02 
.24 
trace 
.35 
.14 
44.97 
15. 38 
2.29 
12.39 
10.89 
7.50 
3.02 
.56 
.10 
.65 
1.18 
.14 
.02 
.02 
.22 
trace 
.23 
.06 
46.74 
16.63 
2.17 
10.60 
6.11 
8.66 
3.81 
.86 
.12 
.73 
2.54 
.33 
(?) 
.03 
.26 
trace 
.07 
.11 
47.88 
18.90 
1.39 
10. 45 
7.10 
8.36 
2.75 
.81 
.18 
.43 
1.20 
.20 
(?) 
.02 
.16 
trace 
.12 
.07 
ALO, 
Fe 2 3 
FeO 
MgO 
CaO 
Na 2 
K 2 
H 2 at 110° 
H 2 above 110° 
Ti0 2 
P„0, 
V 2 3 
NiO, CoO 
MnO 
BaO 
C0 2 
S 
100. 24 
99.98 
99.64 
99.77 
100. 02 
Zr0 2 , CI, and F not looked for. Cr 2 3 , Li 2 0, and SrO present in traces. S is in 
part, at least, present as pyrrhotite. 
