464 
INDEX    TO    NORTH    AMERICAN    GEOLOGY 
Economic  geology — Continued. 
Colorado — Continued. 
Building  and  monumental  stones, 
Lakes,  12. 
Building  stones,  Lakes,  13. 
Camp  Bird  gold  mine,  Titcomb,  1. 
Camp  Bird  mine,  Ouray,  Purington,  3. 
Cave  ore  deposits,  Lakes,  4. 
Cement  materials  and  industry  of  the 
United  States,  Eckel,  34. 
Coal  along  the  eastern  foothills,  Lakes, 
82. 
Coal  and  asphalt  deposits  along  Moffat 
railway,  Lakes,  00. 
Coal  and  mineral  resources  of  Routt 
County,  Farsons  and  Liddell,  1. 
Coal  field  between  Ralston  Creek  and 
Boulder,  Lakes,  80. 
Coal  fields  of  Colorado,  Lakes,  02,  80. 
Coal  mines  of  Huerfano  County,  Lakes. 
99. 
Coals  of  southern  Colorado,  Lakes,  85. 
Colorado  Central  lode,  Foster,  1. 
Colorado:  Report  of  Stale  bureau  of 
mines.  Lee  <  11. A.),  1. 
Copper  deposits  at  Pearl,  Spencer  (A. 
C),  7. 
Copper  mining  in  the  Pearl  district, 
Read,  4. 
Creede  mining  camp,  Lakes,  50. 
Cripple  Creek  volcano,  Rickard  ( T. 
A.),   1. 
Curtis  coal  mine,  Lakes,  .">. 
District  aurifere  de  Cripple  Creek,  Rit- 
ter,  1. 
Economic  geology,  La  Plata  folio,  Pur 
ington,  1. 
Economic  geology  of  the  Silverton  quad- 
rangle, Ransome,  1. 
Example  of  localization  of  rich  ore, 
Rickard    (T.  A.),  0. 
Florence  oil  field,  Fenneman,  9. 
Formation  of  bonanzas  in  upper  por- 
tions of  gold  veins,  Rickard  (T.  A.), 
3. 
Formation  of  Cripple  Creek  mining  dis- 
trict, Moore  (C.  J.),  1. 
Formation  of  Leadville  mining  district, 
Moore  (C.  J.),  2. 
Genesis  of  ore  deposits  in  Boulder 
County,  Bagg,  2. 
Geological  resurvey  of  the  Cripple  Creek 
district,  Lindgren  and  Ransome,  1,  2. 
Geological  structure  of  Camp  Bird  vein, 
Purington,  5. 
Geology  along  the  Animas  River,  Lakes, 
25. 
Geology  and  coal  deposits  of  the  Span- 
ish Peaks  district,  Lakes,  83. 
Geology  and  underground  water  re- 
sources of  the  central  Great  Plains. 
Darton,  18. 
Geology  of  the  Needle  Mountains  quad- 
rangle, Irving  and  Emmons,  1. 
Geology  of  the  oil  fields   of  Colorado,  i 
Lakes,  15. 
Economic  geology— Continued. 
Colorado — Continued. 
Geology  of  Virginius  mine,  Purington, 
7. 
(iisements  de  minerais  de  zinc,  De- 
maret,   1. 
Gold  deposits  of  Plomo,  Gunther,  1. 
Gold  production  of  North  America, 
Austin,  5. 
Gold  production  of  North  America, 
Lindgren,  10. 
Grand  River  coal  field,  Lakes,  87. 
Gypsum  deposits  in  Colorado,  Lakes,  01. 
Influence  of  country  rock  on  mineral 
veins,  Weed,  0. 
La  Plata  coal  field,  Lakes,  84. 
Leadville  district,  Warwick.  2. 
Lodes  of  Cripple  Creek,  Rickard  (T. 
A.),  8,   12. 
Mineralogical   mistake,   Van   Diest,   1. 
Mines  and  ore  deposits  of  Aie  Rosita 
and  Silver  Cliff  mining  district, 
Lakes,  53. 
Mines  of  Ouray  County,  Downer  and 
De  Cou,  1. 
Neglected  mine  and  Near-by  properties, 
Emmons   (W.  IL),   1. 
Occurrence  of  ore  at  Red  Mountain, 
Schwarz,  2. 
Oil  field  of  Mesa  and  Rio  Blanco  coun- 
ties, Lakes,  24. 
Oil  in  Colorado,  Lakes,  21. 
Oil   situation  in  Colorado,   Lakes,  48. 
Oil  springs  of  Rio  Blanco  County, 
Lakes,  17. 
Ore  deposits  in  Georgetown  mining  dis- 
trict.  Spun-  and   Carrey,   1. 
Ore  deposits  near  Lake  City,  Irving,  7. 
Ore  deposits  of  Colorado,  Lakes,  73. 
Ore  deposits  of  Rico  Mountains,  Ran- 
some, 3. 
Ore  deposits  of  the  American-Nettie 
mine,  Ouray,  Downer,  1. 
Ore  deposits  of  the  Ouray  district,  Irv- 
ing, 0,  9. 
Ore  horizons  in  San  Juan  Mountains, 
Purington,  11. 
Ore  occurrence  at  Leadville,  Robbins,  1. 
Plastic  dike  near  Ouray,  Ransome,  2. 
Prospecting  for  oil,  Lakes,  11,  10. 
Peculiar  ore  deposit,  Colburn,   1. 
Redcliff  ore  deposits,  Lakes,  44. 
Report  State  Bureau  of  Mines,  Lee  (H. 
A.),   1. 
Rocky  Mountain  coal  fields,  Storrs  (L. 
S.),  1. 
Secondary  enrichment  at  Cripple  Creek, 
Weed,   21. 
Silver  Lake  mine,  Lakes,  47. 
Silverton  folio,  Ransome,  10. 
Soils  of  Colorado,  Lakes,  40. 
South  Park  coal  field,  Lakes,  89. 
Spanish  Peaks  folio,  Hills,  1. 
Structure  of  Boulder  oil  field,  Fenne- 
man, 5. 
Summit  County  placers,  Lakes,  43, 
