128 ANALYSES OF ROCKS AND MINERALS, 1880-1908. 
A B Cc, Dd. E. 
SiO d..o.c.cu.eriy sacceaieanse meek senate ieee e ecw erpeweceeaees 55.35 | 57.04 | 57. 48 63. 18 
R30 gisis. serie sianiciacnicieininisie® asec 12.91 | 13.66 | 14.09 16.47 
GAO ie cos, cig) sighrcinsalewranislc gAacceaine’ 4.67 4.96 5.21 2. 36 
TE Osco nce Sia baa taeda yareseo el nea seeasiate 2. 06 1.77 1.35 2, 28 
IMG Ol aoc at iseialceclap ite Secil 6, 29 4. 43 3. 49 1.33 
COO Secicc ca ceamcstnener sabes 5.77 6, 23 6, 05 4,77 
INB9O brsisjeicveriietniccaiinsies Sincicins 2.65 3. 08 3. 00 4.40 
KS O ctacientasiontacaistoin wre ted srsiayerere reais ‘ 4. 86 4,95 4,69 2.93 
HoO'at 100° 222 .2cseqe nec secueccunens z 2. 67 111 1.20 27 
H:20 above 100° 1.18 1.10 1.37 . 60 
TO aise. coves Sasseacieacie icine Caen 87 +94 94 - 60 
TPS O ohne nce nauiycatecd endian yess seems tales - 58 - 63 65 28 
IMT Oh scenes aanereichaicnshcusans Sgéeiareaneekepauchnva «08 ol? 09 15 
NTO COO: 5 ciaickt sot Nici Sereie Sty cucaernaee - 05 07) 08 |... 2... 
TP. Op- tte sae retract atapacedearmneals den trace | trace | trace 09 
BAO veces mecciamrarnioscan tease cacao eins -19 22 23 15 
TE 1a vecstasce ascincracenacgaceseakvaen sins are icand eaten? Slee =O teaale Brag ol aieouahales trace | trace? | none trace 
99.98 | 100.36 | 99.92 99. 86 
F. Typical hypersthene andesite, San Francisco Mountains. Lassenose. Not 
described. Analysis by T. M. Chatard, record No. 270. 
G. Recent lava, 2 miles south of Mount Trumbull. Camptonose. Not described. 
Analysis by L. G. Eakins, record No. 1024. 
H. Tourmaline-bearing alkali granite, 5 miles northwest of Bisbee. Liparose. 
Contains microperthitic orthoclase, quartz, oligoclase, biotite, tourmaline, muscovite, 
apatite, zircon, and iron ore. P.R.C.1395. 
I. Granite porphyry, 3} miles north of Waco Junction, Bisbee quadrangle. SR. 7 
of alaskase. Contains quartz, orthoclase, oligoclase, biotite, muscovite, zircon, and 
iron ore. P. R. C. 1396. 
Rocks H and I are described by F. L. Ransome in P. P. 21. Analyses by George 
Steiger, record No. 2034. 
F G. H T 
SI OS indict ieee wawsnte 75. 86 76. 81 
AloO3...-.-.----..- 12.17 10. 96 
FeO gia sistincas reas +85 1.18 
WO a2 arcsasecas . 36 
MEO) sca Phcaceicravens none 14 
CAO vocccaiciaciereacre cere - 62 none 
NGO): crecennea seen 3. 60 26 
KO cxcxsevexcecx 5.04 8.50 
H20 at 105°... .. 227 F 
H20 above 105°. . 72 1.17 
LOoege pertacck cn 21 +13 
PO 5 icin sian sseednasees trace trace 
NEO) 5 sess eefaycie nto ian eo wee e ae Be Ode Nabe Da Sta nana ere none none 
99. 70 99.71 
The following rocks, from Mohave County, are described by F. C. Schrader in 
Bull. 397. Analyses by G. Steiger, record No. 2328. 
J. Minette, Champion mine, Cerbat district. Shoshonose. Contains andesine, 
biotite, augite, orthoclase, iron ores, and apatite, with some secondary chlorite. 
K. Trachyte, Goldroad mine. Omeose. Contains orthoclase, albite, quartz, iron 
ores, apatite, and zircon, with secondary serpentine, epidote, and sericite. 
L. Trachyte, Goldroad mine. Contains sanidine, biotite, chlorite, epidote, serpen- 
tine, and quartz. : 
