932 
INDEX. 
Page. 
Sebenius,  J.  U.,  and  others,  on  Lake  Superior 
region 251, 391 
Secondary  rocks,  character  and  distribution 
of 568, 582, 636, 673 
Sederholm,  J.  J.,  on  geologic  subdivisions 23-24 
on  geology  of  Finland 51-53 
on  igneous  and  sedimentary  rocks 29, 31 
Sedimentary  rocks,  existence  of,  in  Archean. .  23-24 
fusion  of 29-30 
Sedimentation,  relationof,  tochangeof  season.        52 
Seeley  slate,  character  and  distribution  of 719 
correlation  of 719-720 
Seetoya  Range,  rocks  of 795 
Seine  River,  rocks  on 284 
Selkirk  Range,  rocks  of 876, 880 
Selwyn,  A. R.C.,on Animikie series.  265. 270, 398, 399 
on  Bras  Stream 486, 489 
on  British  Columbia  rocks 875, 899 
on  Devonian  granites 77-78 
on  Fort  Garry  district 261. 398 
on  Grenville  and  Hastings  groups 457, 482 
on  Lake  Huron  region 408, 444 
on  Nova  Scotia  slates 506, 523 
on  Ontario  rocks 264-265, 398 
on  Pembroke-Wahnahpitae  region 457, 482 
on  Quebec  group 484. 485, 489 
on  Stoke  Mountains 489, 489 
on  stratigraph  y  of  older  rocks.  75-77, 104, 105, 368 
Selwyn,  A.  R.  C,  and  Dawson,  G.  M.,  on 
Huronian-Laurentian  relations..  78-79, 
105 
Seminoe  Mountains,  rocks  in. . .  45,840,844,845,848 
Separation  Lake,  rocks  near 261 
Serpent  River,  rocks  on 409 
Setters  quartzite,  correlation  of 670-671 
Serpentine  group,  distribution  of 132 
Severn  River,  rocks  on 545 
Seward  Peninsula,  rocks  of 888-889,890 
Shaler,  N.  S.,  on  Boston  geology 571,594 
on  Cape  Ann  geology 575, 595 
Shallow  Lake,  rocks  of 537 
Shannonville,  rocks  of 457 
Sharp  Mountain,  rocks  of 746 
Shasta  Range,  rocks  of 867 
Shatagami  Lake,  rocks  at 531 
Shawmut  group,  character  and  distribution  of      575 
Shawnee,  rocks  near 811 
Shebandowan,  Lake,  rocks  of. 284-285 
Shellrock  Mountain,  rocks  of 857 
Shenandoah  limestone,  correlation  of 671, 709 
Sheppard  quartzite,  character  and  distribu- 
tion of 859 
Sherbrooke,  rocks  near 506 
Sheridan,  Mount,  rocks  in 45, 843, 848 
Sheridan  quartzite,  character  and  distribu- 
tion of 843 
Sherman,  rocks  at 844 
Shickshock  Mountains,  rocks  of 520 
Shi-tsui  group,  character  and  distribution  of. .  55, 56 
Shoal  Lake,  rocks  of 282,287,294 
Shoal  Lake  conglomerate,  character  and  dis- 
tribution of 294 
Shoshone  Mountains,  rocks  of 792, 793, 795, 796 
Shumard,  B.  P.,  on  Baraboo  rocks 717,  749 
on  Missouri  rocks 736, 752 
on  Texas  rocks 742, 744, 753 
Page. 
Shuswap  group,  character  and  distribution 
of 46,541,876-879,881,883 
correlation  of 46,876, 883 
Shuswap  Lake,  rocks  of 875 
Siamo  slate,  character  and  distribution  of. .  157,336 
correlation  of 169, 173, 328-329, 720-721 
Sierra  Ancha,  rocks  of 772 
Sierra  Diablo,  rocks  of 747-748, 749 
Sierra  Madre,  California,  rocks  of 870, 872 
Sierra  Madre,  Mexico,  rocks  of 754, 755 
Sierra  Madre,  Wyoming.    See  Park  Range. 
Sierra  Nevada,  rocks  of 868-875 
Sierra  Pelona,  rocks  of 872 
Signal  Hill  conglomerate,  character  and  dis- 
tribution of 518 
correlation  of 518 
Sillery  sandstone,  character  and  distribution 
of 562 
position  of 486 
Silliman,  Benjamin,  on  Connecticut  geology.      581 
on  Nova  Scotia 506,523 
on  Wasatch  Mountains 782, 893 
Silurian    rocks,    character   and    distribution 
of \ .. .  65-66,180,181,188 
copper  in 118 
gold  in 504 
Silver,  L.  P.,  on  Animikie  range 296, 400 
Silver  Cliff,  rocks  of 813, 828 
Silver-cobalt  area,  rocks  of 431, 446 
Silver  Lake,  rocks  near 148 
Silver  Mountain,  rocks  of 115, 145, 304 
Silver  Plume  granite,  character  and  distribu- 
tion of 809-810 
Silverton,  rocks  near 820-822, 830, 832 
Simcoe,  Lake,  rocks  near 403 
Simon,  Lake,  rocks  near 458 
section  at 458 
Simpson,  Thomas,  on  Kent  Peninsula 528, 548 
Simpson  Bay,  rocks  near 528 
Sinaloa,  rock  of 754, 755, 762 
Sioux  City,  rocks  at 725 
Sioux  district,  rocks  of 44 
Sioux  Falls,  rocks  near 220, 724-725, 726, 731 
Sioux  quartzite,  character  and  distribution 
of 724-727, 731 
correlation  of 197, 208, 250, 314, 318, 726-727 
fossils  in 725, 727 
relations  of 374 
Si-t'ai  group,  character  and  distribution  of...  55,56 
Siyeh  limestone,  character  and  distribution 
of 859 
correlation  of 8C3 
Skagit  River,  rocks  on 866 
Skajit  series,  character  and  distribution  of. .  887, 889 
correlation  of 888, 891 
Slates,  origin  of 82 
Slave  River,  rocks  neaf 536 
Smith,  C.  IL,  jr.,  and  Newland,  D.  II.,  on 
Adirondacks  rocks 613, 649 
Smith,  E.  A.,  on  Alabama  rocks 691-693, 
700, 701, 716 
Smith,  G.  O.,  on  New  England  geology....  589-592 
on  Washington  geology 865-866, 898 
work  of 14 
Smith,  G.  O.,  and  Calkins,  F.  C,  on  Wash- 
ington rocks 866, 898 
