908 
INDEX. 
Page. 
Coastal  series,  relations  of 493, 495 
Coast  Range,  rocks  of 8G7-875 
Cobalt  district,  rocks  of 431-432, 434, 440 
Cobalt  series,  character  and  distribution  of. ..      431 
Cockburn  Island,  rocks  of 526 
Cockeysville  marble,  correlation  of 670-671 
Cceur  d'Alene  district,  rocks  of 850-851, 862, 864 
Ccour  d'Alene  Lake,  rocks  near 851 
Coeur  d'Alene  Mountains,  rocks  of 852 
Coinneach  Brook,  rocks  on 508 
Coldbrook  series,  character  and  distribution 
of 83-84, 97, 491,  492, 494 
correlation  of. .  493, 494, 496, 499, 502-503, 511, 513 
relations  of.... 491,492,495 
Coleman,  A.  P.,  nomenclature  by 377 
on  Archean  classification. .  101, 107,278-279,399 
on  correlation 296 
on  Cobalt  district 434, 447 
on  lluronian 282-286, 323, 399, 402 
on  iron  and  copper  regions 286, 
289,291-292,399,400 
on  Lake  Superior  stratigraphy 371,372 
on  Lower  lluronian  ice  age.  103, 107, 361, 433,  447 
on  Michipicoten  iron  district 286-287 
291,399,400 
on  Nipigon  Lake  ranges 296-297 
on  Ontario  gold  fields 280-281, 399 
on  Port  Coldvvell  region 291, 400 
on  Rainy  Lake  region 278-279, 280, 399 
on  Sudbury  nickel 426-427, 430, 432, 446 
Coleman,  A.  P.,  and  Willmott,  A.  B., on  Lake 
Superior  strat  igraphy 372-373 
on  Michipicoten  iron  ranges 289-291, 400 
Coleman,  A.  P.,  and  others,  on  Adirondack 
correlation 617-619, 650 
Colebrook  formation,  character  and  distribu- 
tion of 874 
Colesbrook  gneiss,  character  and  distribution 
of 43,591 
Collie,  G.  L.,  on  Conanicut  Island 584, 596 
Collier,  A.  J.,  on  Alaska  rocks 884,889 
on  Idaho  rocks 851-852, 897 
Colorado,  correlation  in 45 
pre-Cambrian  rocks  of . .  45, 768-771, 800-833, 865 
literature  of 768-770, 800-824 
unconformities  in 39 
Colorado  Desert,  rocks  on 869 
Colorado  Mountains,  rocks  of 771 
Colorado  Range,  rocks  of 804 
Colorado  River,  rocks  on 771-777, 869 
Columbia  River,  rocks  on ,. 865, 866 
Columbia  Range,  rocks  of 878 
Comanche  Creek,  rocks  on 769 
Comstock,  T.  B.,  on  Arizona  rocks 776, 792 
on  Colorado  rocks 819, 895 
on  Texas  rocks 744-746, 753 
on  Wyoming  rocks 841, 896 
Conanicut  Island,  rocks  of 584 
Conception  Bay,  rocks  near 514, 516 
Concord,  rocks  of 567 
Concord  granite,  character  and  distribution  of      557 
Conkling,  A.  R.,  on  California  rocks 871,899 
Conmee  Lake,  rocks  of 275-276 
Connecticut,  pre-Cambrian  rocks  of 579- 
583, 587-589, 592 
Connecticut  Valley,  rocks  of 556, 567, 568 
Page. 
Conrad,  T.  A.,  on  Mohawk  Valley  rocks 597, 617 
Conshohocken,  rocks  near 656 
Conway  granite,  character  and  distribution 
of 555,556,557 
correlation  of 587 
Coochetopa  Creek,  rocks  on 818 
Cook,  G.  II.,  on  New  Jersey  geology.. .  636-637,652 
Cooper  Mountain,  rocks  of 805 
Coos  group,  character  and  distribution  of 554- 
555, 556 
correlation  of 587, 729 
Cope,   E.  D.,  on  Sangre   de   Cristo  Moun- 
tains   812, 894 
Copper,  deposits  of 347 
Copper-bearing  series,  age  of . . .  118, 121 ,  187-188, 255 
character  and  distribution  of 180, 
181, 182, 187, 258-260, 261, 263, 264 
correlation  of 365, 406 
description  of 114- 
115, 121, 124-125, 126, 128-129, 162, 301-308 
relations  of 183 
use  of  term 60, 121 
Sec  also  Keweenawan  series. 
Copper  Cliff,  rocks  near 425 
Copper  Creek,  rocks  on 188, 304 
Copper  Palls  mine,  fossils  at 112 
Copper  Harbor,  contact  at 113 
rocks  at 110 
Copper  Mountain,  rocks  of 644 
Copper  Mountains,  rocks  of 526, 528 
Coppermine  River,  rocks  near.  526,527,528,535,547 
Coppermine  River  trap,  distribution  of 42 
Coppermine  series,   character  and  distribu- 
tion of 527 
correlation  of 536 
Copper  range,  rocks  of 180 
Copper  region,  account  of 114-115 
Copper  River,  rocks  on 889 
Cordilleras,  pre-Cambrian  rocks  of 754-891 
pre-Cambrian  rocks  of,  literature  of 754- 
755, 7GS-777, 779-789, 791, 824, 833-867, 875-882 
Corey,  G.  W.,  and  Bowen,  C.  P.,  on  Keewatin 
schists 174,391 
Cornelius,  Elias,  on  Virginia  geology 673, 714 
Coronado  quartzite,  character  and  distribu- 
tion of 777 
Coronation  Gulf,  rocks  of 528 
Correlation,  use  of  lithology  in 84 
use  of  unconformities  in f 85 
Corstorphine,  G.  S.,  and  Hatch,  F.  II.,  on  pre- 
Cambrian  rocks 54 
Cortez  Range,  rocks  of 792, 796 
Cortlandt  series,  character  and  distribution  of.       629 
correlation  of 319 
Costilla  Creek,  rocks  on 769 
Costilla  Peak,  rocks  on 770 
Cotter  Island,  fossils  on ' 543 
Cotting,  J.  R.,  on  Georgia  rocks 689-690, 716 
Cottonwood  Canyon,  rocks  in 782, 783-790 
Cottonwood  Creek,  rocks  on 802 
Coulonge  Lake,  rocks  near 467 
Courtland,  rocks  of 252 
Coutchiching  series,  character  and  distribu- 
tion of 221 , 228, 268-270, 275- 
277, 279, 280, 282-283, 284, 294, 340, 537 
