CLARKK.] 
IGNEOUS AND CRYSTALLINE ROCKS. 
101 
K. Banakite dike, head of Lamar River. Contains augite, serpen- 
tinized olivine, orthoclase, plagioclase, biotite, magnetite, ilmenite, 
apatite, and analcite. Adjoins rock B. Analyses by Eakins, No. 1375. 
L. Banakite dike, Hoodoo Mountain. Like K, but with amygda- 
loidal zeolites. Analysis by Eakins, No. 1371. 
M. Banakite dike, Ishawooa Canyon, Wyoming. Like K and L, but 
more feldspathie. Contains a little serpentine, probably from olivine; 
also possibly analcite or sodalite. Analysis by Eakins, No. 1086. 
N. Banakite dike, near head of Stinkingwater River. Like M, but 
with more serpentine. Analysis by W. H. Melville, record No. 1232. 
SiO,.. 
A1A- 
FeA- 
FeO . . 
MgO. 
CaO.. 
Na 2 0. 
K 2 0.. 
Ti0 2 . 
PA- 
MnO 
MO. 
BaO. 
51.82 
ie.75 
4.56 
3.36 
4.03 
4.94 
3.91 
5.02 
3.97 
.71 
.52 
.23 
26 
100. 08 
52. 63 
16.87 
4.52 
3.11 
3.69 
4.77 
3.86 
5.17 
3.65 
.81 
.63 
.10 
.29 
100.10 
M. 
51.46 
18.32 
4.61 
2.71 
2.91 
6.03 
4.11 
4.48 
3.89 
.83 
.86 
.17 
100. 38 
N. 
52.33 
18.70 
4. 95 
1.83 
2.69 
4.71 
4.51 
5.45 
.74 
2.71 
.71 
.81 
.03 
.14 
100. 31 
