348 ANALYSES OF ROCKS, U. S. GEOLOGICAL SURVEY, [no. 228. 
ARIZONA. 
Shales from the Morenci district, collected by W. Lindgren. Analy-j 
ses by W. F. Hillebrand, record No. 1997. 
A. Fresh, black, Devonian shale, near Longfellow mine. 
B. Same locality, adjoining dike. The result of contact meta- 
morphism. 
A. 
Si0 2 
ALA 
Fe 2 3 
FeO 
MgO 
CaO 
Na 2 
K 2 
H 2 at 105° . . 
H 2 above 105 
Ti0 2 
Zr0 2 . 
PA 
MnO 
BaO 
SrO 
LU> 
FeS 2 --------- 
CuFeS 2 
ZnO 
61.25 
15. 60 
1.35 
3.04 
4.16 
3.40 
.44 
6. 74 
.62 
2.09 
.66 
trace? 
.08 
.07 
trace 
none 
trace 
.25 
.03 
.03 
99.81 
60.51 
15. 81 
1.40 
2.64 
4.25 
2.34 
1.26 
8.27 
.59 
1.90 
.68 
trace 
.08 
.11 
.17 
.01 
trace 
.04 
trace 
.02 
100. 08 
