502 
INDEX. 
Page 
Pratt  coal,  Ala.,  sections  of 214  218 
Pratt  mine,  Utah,  coal  of,  section  of 297 
Preston,  Ky.,  iron  ores  at L80  L81 
Price  River  Valley,  Utah,  ozokerite  in 3(9 
Prichard  slate,  occurrence  and  character  of.       43, 
45,49-51,131 
Prince    of    Wales    Island.    Alaska,    copper 
mines  of 97-98 
Prince  William  Sound,  Alaska,  copper  mine 
on 98 
Prospect   Creek    Montana,   mines   on,   de- 
scription of 51 
Provincetown,  Mass.,  clays  near 435 
Pryorsburg,  Ky.,  clays  at 420 
Publications  of   United   States  Geological 
Survey,  character  and  price  of .     7  13 
Punxsutawney    and    Glen    Campbell    coal 
fields.  Pa.,  coals  of 278  279 
geology  of 276 
production  of 279 
Punxsutawney  basin,  Pa.,  coal  of 277 
Pyramid  district,  N.Mex.,  copper  of 118 
Pyrite,  bibliography  of Is" 
impregnation  by 
investigation  of 24 
Q. 
Quaker  Mountain,  Colo.,  coals  on 239 
Quartz,  gold  in 56 
occurrence  of,  in  black  sands 152  L56 
Quitchupah  Canyon    I  tah,  coal  of 
R. 
Radford  Furnace,  Va.,  iron  ores  at 193 
Rainy  Creek,  Mont.,  mines  on 51 
Ranchester,  Wyo.,  coaJ  near 305 
coal  near,  sections  of 305  306 
Ransome,  I'.  1...  on  Bisbee  copper  ores  ...  99  101 
on  La  Plata  sandstone 127 
work  of 17   18,53,55 
Itatcliff  bank,  Colo.,  coal  of 234 
Rattlesnake  mine,  New.  ores  of 63 
Read  mine,  Utah,  coal  mine 300 
Recent  clays,  description  of 416 
Red  Beds,  copper  in 86,118,127 
occurrence  and  character  of 30 
Red  Buttes,  Wyo.,  gypsite  at 405 
gypsum  at 404  405 
analysis  of 405 
Red  ores.     See  Clinton  ores. 
Red  Mountain,  Wye,.,  gypsum  on 404 
gypsum  on,  section  of 405 
Red  Plateau.  Utah,  sandstone  of , character 
of 291 
Redwing  (reek,   X.    Dak.,  lignite  on  and 
near 327 
Republic  region,  Ala.,  coal  of,  section  of.  .  .       214 
Revenge  lode,  Idaho,  description  of 137  138 
Revett  quartzite,  occurrence  and  character 
of 43,131,136 
Reynolds  (I-:.  J.)  &  Co.,  glass-sand  quarry 
of 465 
Rhodes  mine,  1  tah,  coal  of,  section  of 297 
Rhyolite,  gold  in 57-90 
Rhyolite-porphyry,  gold  in 32 
occurrence  of 29 
Page. 
Rhyolite-porphyry,    petrograptiic    descrip- 
tion of 26 
Richards,  R.  II.,  work  of I.">7,l(i0 
Richards,  R.  II..  and  Day,  D.  T.,  on  black 
sands 150-164 
Richardson,    G.    B.,    on    coal    in    Sanpete 
County.  Utah 280-284. 
on  Texas  tin  deposits 14(1-149 
work  of 17,19,78,206 
Richardson  mine,  coal  of,  analysis  of 339-340 
Rio  Puerco,  N.  Mex.,COal  near,  section  of..       251 
Riverside,  Wyo.,  bentonite  on 447 
Road  metal,  bibliography  of 451 
Robinson  copper  district .  New,  ores  of  .  .    116-117 
Roche  Harbor,  Wash.,  sandstone  and  shale 
on 377-378 
analysis  of ;^78 
Rochester  and    Pittsburg  Coal   and    Iron 
Co.,  mines  of 279 
Rock,  Ky.,  clays  at 420 
clays  at,  analysis  of 421 
Rock  Canyon,  Utah,  coal  of 295 
Rockland,  Me.,  investigation  at 23 
limestone  near,  description  of 393,3!  19-400 
limestone  near,  location  of,  map    show- 
ing        394 
section  of.  figure  showing 397 
Rockland  Rockporl  Lime  Co.,  process  of.  395-396 
Rockport,  Me.,  investigation  at 23 
limestone  near 393 
loca  t  ion  of.  map  showing 393 
Rockwood  shale,  occurrence  of 173 
Rocky  Mountains,  geologic  history  of 79 
Rocky  Mountain  Coal  and  Iron  Co.,COal  of.       338 
coal  of.  analysis  of 339 
Rocky  Mountain  region,  work  in 17  19,21-22 
Rosebud   Mining  Cm.,  mines  of,  description 
of 51 
Round  Mountain,  Wyo.,  oil  well  at 347 
Routt  County  coal  field.     Srr  Yampa  coal 
field. 
Russell  ranch,  V  Dak.,  lignite  at ,  section  of.       324 
Uussia.  copper  in,  production  of 94 
Ryan,  Wash.,  marble  at • 383 
marble  at,  analysis  of 383 
S. 
Saddle  Mountain  Mining  Co.,  properly  of. .       101 
Sage,  Wyo  ,  coal  at 330 
Sage  Creek  Canyon,  coal  field  of 232-233 
coal  of,  analyses  of 232-233 
Saguache  Mountains,  Colo.,  iron  ores  on..  19G-197 
St .  Joe  River,  Idaho,  access  to 130 
copper  deposits  on 134-136, 139 
gold  on 136-139 
lands  on,  classification  of..- 129,139 
lead-silver  ores  on 133-134, 138 
map  of 130 
ores  of 129-139 
reconnaissance  of 129 
rocks  of 131-132 
timber  on 130-131 
topography  of 131 
St .  Con  is,  Mo.,  glass  making  at 460 
St .  Louis  district,  111  -Mo.,  glass  making  in..       460 
st    Peter  sandstone,  occurrence  of 469-472 
