126 ANALYSES OF ROCKS AND MINERALS, 1880-1908. 
E. Biotite dacite, one-fourth mile north of Old Dominion mine. Toscanose. Con- 
tains plagioclase, sanidine, quartz, biotite, hornblende, apatite, titanite, zircon, 
magnetite, and glass. P. R. C. 1299. 
F. Quartz-mica diorite, Florence stage road 2 miles south of Pinal Peak. Tonalose. 
Contains labradorite, quartz, biotite, microcline, muscovite, titanite, apatite, mag- 
netite, and zircon, with secondary chlorite, epidote, sericite, calcite, and a little horn- 
blende. P. R. C. 1295. 
G. Quartz-mica diorite, 2 miles south of Hog ranch, Pinal Mountains. SR. 3 of 
vaalase. Contains labradorite, quartz, biotite, orthoclase, muscovite, magnetite, 
titanite, apatite, and zircon, with secondary epidote, sericite, and chlorite. P.R. C. 
1296. 
H. Olivine diabase, 1 mile northwest of Black Peak. -Auvergnose. Contains 
plagioclase, augite, olivine, biotite, iron ore, apatite, and titanite. Perfectly fresh. 
P.R.C. 1298. 
E F Ga. EH. 
SiO geisc cc caenaenen sis SESS Geiduakeisenaneiee S2SESEERR Gat Seer een 68.76 | 58.74] 61.99 49.00 
PY 5 Oise seseicpe ech ccbovesnpave a So4isie diets enses uecateiaeigle DeLee G ERMA TERS 15.48 | 16.02] 15.81 16. 87 
Bes Oa casiharedavions okionicioac coco ceaeeiss ae PRS nemo Ue Eae 2.50 4.16 3. 28 2.09 
FeO. -44 3.50 2. 69 8.50 
MgO -56 2.18 2.24 6.70 
CaO. 2.23 5.12 4. 62 10. 21 
Na,O 3. 89 3.26 2.73 2. 57 
K20.... --| 3.88 2.39 2.51 - 66 
sO iat 105 wrxe sacoeatnveigertictemiers aemerernemomcnietan iprsaeciesiemiciets nig, Anssceacaiints peareinraceee -79 . 83 91 a2 
HO above 106 csscccmiseasenarecenwess va at Sees Va Doha eeOA Seeeieee! .57 1.60 1.99 1.00 
WO gi science cient Shad de Sue xe aoe Dre SE ROSE ERE Se eee Senay -50 1.29 .94 1 
ZrO ae, Soca. gadiniced ninsdinaicasiderid aaaees ke Cages eeeat ek eR eee ok eee - 03 05 = 03 . 02 
P205 - 06 -56 lt, 13 
Cl.... - 03 | undet. | undet. 05 
MnO. 02 -22 | trace 10 
BaO. 08 -10 06 trace 
St O) sax swaiesuniescnyascsad on aie eam ee Mesh RE Pate eee REET SEE eR ERE Raa SER none | trace | undet. none 
NiO) ccosa: cicizctciasessretomcngisine Sy ewemetl ones SoS RRR EMI eet TURE ERRES teciera none | trace?; undet.| none 
C19 OS vrais ee crenrectiwntatninin seraainia sien Seelouineie nanateitia miemeaiee tn oe lUISiO Ne EINES DONE: |s.s:-sesscaie trace 
VWaO a. onc exc cuweewceeew ewes pea neee ce reais mater actoinee oe ome aeonE ES eytiagiges [bememees seems trace 
Siverss none |........ trace none 
FeSe none phil eeeteer pemereee 
DisOecies ts ccna coigetiees Pues Haseeeke Kee aeee Ward state anes Mueekatae seam ac|ageceeane trace |undet. | undet. 
2, BRADSHAW MOUNTAINS QUADRANGLE. 
Analyses by George Steiger, record No. 1996. Petrographic data furnished by 
C. Palache. Published by Jaggar and Palache in Folio 126. 
A. Quartz monzonite porphyry, Battle Flat. Tonalose. Contains quartz, ortho- 
clase, oligoclase, green hornblende, and a little apatite and magnetite, with much 
secondary chlorite and calcite. P. R. C. 1694. 
B. Camptonite, Crazy Basin, 2 miles east of Alexandra. Shoshonose. Contains 
brown hornblende, augite, biotite, feldspar, magnetite, and apatite. The feldspar 
is apparently about equally orthoclase and andesine, but largely altered to sericite 
and calcite. P. R. C. 1695. 
C. Basalt, facies of trachydolerite, headwaters of Little Ash Creek. Auvergnose. 
Contains labradorite, violet augite, olivine, magnetite, and abundant apatite, with 
secondary serpentine. P. R. C. 1696. 
D. Trachydolerite, headwaters of Little Ash Creek. Akerose. Contains oligoclase, 
augite, a little orthoclase and nephelite, xgirite, olivine, and abundant magnetite 
and apatite. P.R.C. 1697. 
E. Zoisite-hornblende diorite, head of Yava Wash. Kedabekase. Contains zoisite, 
about 47 per cent; actinolite, 17 per cent; quartz, orthoclase, albite, chlorite, kaolin, 
and magnetite. P. R. C. 1698. : 
