ABSAROKITE-SHOSHONITE-BANAKITE SERIES. 947 
small nucleus of lime-soda-feldspar. Another one of these five 
sheets of lava is shoshonite like the last two mentioned. 
BANAKITE. 
The most feldspathic rocks of this series, which occur as 
dikes associated with dikes of shoshonite and absarokite, are not 
so numerous, although more of them have been analyzed. They 
occur in Crandall Basin, in Ishawooa Canyon and near the head 
of Stinkingwater River. A leucite-bearing variety forms a lava 
sheet near Beaverdam Creek. Their chemical composition is. 
shown by the analyses in Table III. 
TABLE III. CHEMICAL ANALYSES OF BANAKITES. YELLOWSTONE. 
NATIONAL PARK AND VICINITY. 
I 2 3 4 5 6 if 
SiO, = 51.82 52.63 51.46 52-33 52.93 57.29 60.89) 
TiO, - - 71 81 83 afi 2 72. 49: 
Al,O3 - 16.75 16.87 18.32 18.70 19.67 18.45 7/eiitt 
Fe,03; - 4.56 4.52 4.61 4.95 3.07 4.38 3:32 
FeO - 3.36 3.11 Dil 1.83 3.50 1.20 95. 
MnO - - BR .10 17 .03 15 tt 09) 
MgO _ - 4.03 3.69 2.91 2.69 2.88 2.08 1.16) 
CaO - - 4.04 4.77 6.03 4.71 4.69 3-57 3-58. 
BaO- - 56 29 shavers Ae Bil phate sees 
Na,O = »3501 3.86 4.11 4.51 4.20 4.43 4.54 
KO = 5.02 5.17 4.48 5.45 4.75 5.43 5.71 
BOW = 26-40 252 63 .86 81 59 46 Bay) 
NiO - ee a hare be ae ale See 51D) 19) 
HE OO! =1 =) 3-07 3.65 3.89 3-45 Zee} 2.18 1.61 
100,08 100510 1c038  10e}3438) 00,09 100:3% 99.94 
. Banakite, dike, head of Lamar River, analyzed by L. G. Eakins. 
. Banakite, dike, Hoodoo Mountain, analyzed by L. G. Eakins. 
. Banakite, dike, Ishawooa Canyon, analyzed by L. G. Eakins. 
. Banakite, dike, near head of Stinkingwater River, analyzed by W. H. Mel- 
ville. 
5. Leucite-banakite, lava sheet, southeast fork of Beaverdam Creek, analyzed 
by L. G. Eakins. 
6. Quartz-banakite, dike, near head of Stinkingwater River, analyzed by W. H. 
Melville. 
7. Quartz-banakite, dike, near head of Stinkingwater River, analyzed by W.H. 
Melville. 
& & NH 
