w  a  km  an.]  RHYOLITE.  657 
Rhyolite  of  Colorado,  Crested  Butte  quadrangle    GF  9,  pp  2,  5 
of  Colorado,  Cripple  Creek  district Ann  16,  n,  p  53 
Mosquito  Range Mon  xn,  pp  87,  345-352 
Pikes  Peak  quadrangle GF  7,  pp  3, 4,  7 
Silver  Cliff  and  Rosita  Hills Ann  17, 
ii,  pp  296-303,  341-342,  358-359,  383, 398-400,  402, 448-466 
Telluride  quadrangle GF  57,  pp  5-6,  7 
Tenmile  district GF  48,  p  3 
( >f  Idaho,  Boise  quadrangle GF  45,  pp  3-4 
western-central Ann  20,  in,  pp  120-121 
of  Maine,  Aroostook  volcanic  area,  petrography  of Bull  165,  pp  152-161 
of  Montana Bull  L39,  pp  69-71 
Butte  district GF  38,  pp  1,  2 
Little  Belt  Mountains  quadrangle GF  56,  pp  4-5 
Livingstone  quadrangle <  <  F  1 ,  \ >  .'5 
microscopic  petrography  of Bull  139,  pp  L18-128 
Three  Forks  quadrangle. GF  24,  p  4 
of  Nevada,  Eureka  district \nn  3,  pp  278-279;  Mon  xx,  pp  237,  374-385 
of  New  Mexico,  Tewan  Mountains Bull  62,  pp  10-12 
of  ( >regon,  Roseburg  quadrangle GF  49,  p  3 
of  Philippine  Islands Ann  21,  in,  pp  518,  522 
of  Sierra  Nevada Ann  14,  n,  pp  484-487;  Ann  17,  i,  pp  613-614 
of  Utah,  Tintic  district Ann  19,  in,  pp  632-635;  GF  65,  p  2 
of  Wyoming,  Absaroka  district GF  52,  p  5 
of  Yellowstone  Park  ....Mon  xxxn,  n,  pp  172,  321-325,  356-432;  GF  30  pp  3,  6 
fayalite  in  Ann  7,  p  270 
thin  section  of,  from  Nevada,  Eureka  district Mon  x.\,  pp  406-407 
from  Nevada,  Eureka  district,  micropegmatitic  phenocryst  in Mon  \\, 
pp  400-401 
topaz  in Mon  xn,  p  347;  Bull  20,  p  81 
Rhyolite  breccia  from  Texas,  San  Carlos  coal  field Bull  1(54,  pp  89-90 
Rhyolite-felsite,  analysis  of,  from  Yellowstone  Park,  Echo  Peak Mon  xxxn,  n, 
P  65;   Bull  lis.  p  132;   Bull  168,  p  106 
Khyolite-pitchstone,  analysis  of,  from  Montana,  Castle  .Mountain  district Bull 
139,  pp  125,  135,  136;  Bull  148,  p  150;  Bull  168,  p  129 
Rhyolite-porphyry,  analysis  of,  from  Montana,  Yogo  Ridge Ann  20,  in, 
pp  523,  574,  580;  Bull  148,  p  146;  Bull  168,  p  125 
of  California,  Bid  well  Bar  quadrangle GF  43,  p  4 
Downieville  quadrangle GF  37,  p  4 
of  Michigan,  Crystal  Flails  district Ann  19,  in,  pp  50-51,  86-88; 
Mon  xx xvi,  pp  81-87 
of  Montana,  Judith  Mountains Ann  18,  in,  p  560 
Little  Belt  Mountains Ann  20,  in,  pp  375,  520-524 
Little  Belt  Mountains  quadrangle GF  56,  pp  3,  4 
of  Sierra  Nevada Ann  17,  i,  pp  646-649 
thin  section  of,  from  Michigan,  Crystal  Falls  district Ann  19,  in,  pp  86-87, 
88-89;  Mon  xxxvi,  pp  270-271,  272-273 
Rhyolite-porphyry,  schistose,  thin  section  of,  from  Michigan,  Crystal  Falls  dis- 
trict   Mon  xxxvi,  pp  276-277,  278-279 
Rhyolite-tuff,  analysis  of,  from  California,  Lassen  County Bull  148, 
pl92;  Bull  168,  p  178 
analysis  of,  from  Yellowstone  Park,  Two  Ocean  Pass  (trachytic) Bull  148, 
p  132;  Bull  168,  p  106 
Rhyolite  Mountain,  Colorado,  volcanic  breccia  of Ann  16,  n,  p  101 
Bull.  177—01 42 
