IXDEX. 
935 
Page,    i 
Texas,  correlation  in 45 
pre-Cambrian  rocks  of 45. 94. 99. 742-749 
literature  of 7  2  748 
Thessalon,  rocks  near 285, 312, 414, 425-420,  430 
Thessalon  group,  character  and  distribution 
of <2,410 
correlation  of 325,  409,  430,  439 
relations  of 438 
Thessalon  River,  rocks  near 407, 408-409, 41 1 
Thomaston  granite,  character  and  distribu- 
tion of 580 
Thompson,  rocks  at 198 
Thompson,  Z.,  on  Green  Mountains 500, 593 
on  Vermont 504, 593 
Thompson  Creek,  rocks  on 801 ,  827 
Thompson  slate,  character  and  distribution 
of 225 
correlation  of 225 
Thousand  Isles,  rocks  of 300, 
403,448,452,459,468,614 
Threeforks  quadrangle,  rocks  of 855-856. 860 
Threemile  Lake,  rocks  near 422 
Three  Rivers  region,  rocks  of 471 
Thunder  Bay,  rocks  near 255, 257, 
261, 264-265, 270-273, 280, 287, 292, 300, 301, 
306,307,  325,  341,348.352,355,366,367,372 
Thunder  Cape,  rocks  of 265 
Thunderhead   conglomerate,   character   and 
distribution  of 686, 687 
Tidewater  gneiss,  character  and  distribution 
of 638 
Tight,  Wi  G.,  Jones,  IT.  L.,  and  Herrick, 
C.  L.,  on  Ontario  rocks...  267-268,398 
Tincup  Pass,  rocks  near 816, 817, 829 
Tishomingo  granite,  character  and  distribu- 
tion of 741, 752 
Tobacco  Plains,  rocks  of 862, 880 
Tobique  River,  rocks  on 501 
Todd,  J.  E.,  on  Black  Hills  rocks 731 
on  Sioux  Falls  rocks 726, 750 
Todos  Santos,  rocks  near 762 
Tolland,  rocks  near 579 
Tomatlan,  rocks  of 763 
Tompkins  Cove,  rocks  at 630 
Tonto  sandstone,  character  and  distribution 
of 772-775 
correlation  of 773 
relations  of 772, 778 
Topography,  Archean  and  Algonkian,  differ- 
ences of 22 
Torch  Lake,  rocks  near 120. 129, 136, 145,305 
Torch  River,  rocks  on 113-114 
Tornebohm,  A.  F...  on  Swedish  rocks 51 
Torridonian,  character  of 48 
correlal  ion  of 51 
with  Algonkian 49 
Totsen  group,  character  and  distribution  of. .       40, 
-  887,890 
correlation  of 10, 888, 889,  89 1 
Tou-ts'un  slate,  character  and  distribution  of.        56 
Tower,  rocks  near 236 
Tower  group,  correlation  of JOT 
Towner,  rocks  near 629 
Townsend,  rocks  near 858,  86] 
Traders  member,  character  and  distribution 
of 171,  L72,337 
Page. 
Traders  member,  correlation  of 328-329 
Transition  rocks,  distribution  and  character 
of 64,  403, 526, 527, 568, 597-599. 
022,  026,  635,  653,  664,  677-678,   689 
Trappmans  Camp,  rocks  at 798 
Trap  Point,  rocks  of 528 
Trap  series,  character  and  distribution  of 582 
Traverse  Island,  rocks  of 145 
Trembling    Lake  limestone,    character   and 
distribution  of 452, 460 
Trembling  Mountain,  rocks  near 460, 464,  466 
Trenton,  rocks  at 035. 637 
Trenton  limestone,  relations  of 459 
Triadelphia,  rocks  near 668 
Trinity  Bay,  rocks  on 516 
Trinity  River,  rocks  near 873 
Triunfo,  rocks  of 762 
Troost,  Gerard,  on  Tennessee  geology 685, 715 
Trout  Creek,  rocks  on 803, 809 
Trout  granite,  character  and  distribution  of..      334 
Troy,  rocks  near 568, 594 
Truckee  Mountains,  rocks  of 792, 793, 796 
Truxton,  rocks  at 772 
Tucson,  rocks  near 770 
Tudor,  rocks  near 453 
Tung-yii  limestone,  character  and  distribu- 
tion of 56 
Tuomey,  M.,  on  Alabama  rocks 691,  710 
on  South  Carolina  rocks 687-688, 716 
Turkey  Mountain,  rocks  of 644 
Turks  Gap,  rocks  near 674 
Turnley  hornstone,  correlation  of 858 
Tusket  Islands',  rocks  of 505 
Twin  Falls,  rocks  near 332 
Twin  Peak,  rocks  of 786,  788 
Tylers  Fork,  rocks  at 143 
Tyler  slate,  character  and  distribution  of . . . .      337 
correlation  of 328-329 
Tyringham  gneiss,  character  and  distribution 
of 578, 579 
correlation  of 591 
Tyrrell,  J.  B  ,  on  Hudson  Bay  region..  539-540,550 
Tyrrell,  J.  B.,  and  Dowling,  1).  B.,  on  Atha- 
baska-Chnrchill  R iver  region 538- 
539,544,550,551 
on  Lake  Winnipeg  region. .  540-54! ,  544, 550, 551 
on  Saskatchewan  disl  rid 541,  551 
Tyson,  P.  T.,  on  California  jocks 868,898 
on  Maryland  rocks 664-665,  713 
U. 
Uinta  Mountains,  fossils  in 
rocks  in 45.  46,  779-782, 
Uinta  series,  character  and  distribution 
correlation  of 
CJmpqua  Range,  rocks  of 
Unaka  Mountains,  rocks  of 685, 
Uncompahgre  Canyon,  rocks  of.  45,825 
Uncompahgre  quartzite,  character  an< 
tribi  it  ion  of 
Uncompahgre  River,  rocks  on 
Unconformity,  beneath  the  Ajibik 
beneath  the  Ugonkian. .  20,  22,353 
beneath  the  Animikie. ....  352  353, 
beneath  the  Cambrian 
7S1 
789-790, 864 
of...  779- 
782,  790 
780,  782,  790 
867 
706,707,708 
826,831,832 
1  dis- 
...  823,832 
822,  823 
...  353.350 
356,384  386 
356,382  384 
349-351,356 
