CLARKE.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
27 
2. MISCELLANEOUS ROCKS. 
A. Amphibolite, Guilford. Described by Emerson in Mon. XXIX. 
Contains hornblende needles, with albiteand rutile. Analysis by L. Gr. 
Eakins, record No. 1326. 
B. Granitoid gneiss, north of Lincoln's. 
C. The same, west slope of Little Peco. 
D. Chloritic granite. East Clarendon section. 
E. Hornblende-granite, East Clarendon section. 
Rocks B, C, D, and E collected by C. L. Whittle, but not described. 
Analyses by H. N. Stokes, record No. 1396. 
Si0 2 . 
A1 2 3 
Fe 2 3 
FeO. 
MgO 
CaO. 
Na 2 
K 2 0- 
H 2 . 
Ti0 2 . 
PA. 
Cr 2 3 
Mn( ) 
BaO. 
A. 
49.16 
16. 43 
3.92 
7.19 
8.19 
9.21 
3.70 
.41 
.45 
1.03 
.16 
trace 
.23 
.02 
B. 
71.02 
15. 00 
1.12 
1.81 
.69 
.31 
2.48 
5.79 
1.14 
.35 
.13 
trace 
trace 
100. 10 
99.84 
69.97 
14.90 
2.16 
.96 
.37 
.45 
2.85 
6.54 
.66 
.44 
.12 
67.33 
16.20 
1.40 
2.73 
1.31 
2.81 
3.15 
2.14 
1.84 
.80 
.16 
K. 
trace trace 
. 09 . 05 
99.51 
92 
52.60 
18.45 
2.47 
6.11 
4.22 
7.55 
3.24 
1.12 
2.53 
1,11 
.20 
23 
99.83 
