916 
INDEX. 
Page. 
Houghton  region,  rocks  of 124, 125, 126 
Houghton,    Douglas,    on    Upper    Peninsula 
rocks 108-1 10, 386 
Housatonic  Valley,  rocks  of  and  near 579 
Howe,  Ernest,  on  Needle  Mountains  rocks. . .     821- 
822, 896 
Howe,  E.,  Cross,  W.,  and  Irving,  J.  D.,  on 
Ouray  quadrangle 823, 896 
Howe,  E.,  Ransome,  F.  L.,  and  Cross,  W.,  on 
Sil verton  quadrangle 822, 896 
Howe,  Ernest,  and  others,  on  Needle  Moun- 
tains quadrangle 822-823, 896 
Howell,  E.  E.,  on  Nevada  rocks 792, 893 
on  Wasatch  Mountains  rocks 783, 893 
Howley,  J.  P.,  on  Newfoundland..  516,517,519,524 
Hubbard,  L.  L.,  on  Kearsarge  conglomerate. .     153- 
154, 390 
on  Keweenaw  Point  sections 151- 
152,162-163,389,390 
Hudson  Bay,  rocks  near 273, 528, 531-547 
Hudson  River,  rocks  near 622, 623, 624, 626, 630 
Hudson  River  group,  character  and  distribu- 
tion of. 657 
correlation  of 565, 585, 628, 633 
relations  of 626 
Hudson  Strait,  rocks  near 540, 541 
Hueco  Mountains,  rocks  of 744 
Hull,  rocks  at 725 
Hulst,  N.  P.,  on  geology  of  Menominee  dis- 
trict   150-151, 389 
Humboldt,  rocks  at 145 
Humboldt  Mountains,  rocks  of 791, 792-793, 795 
Hungarian  River,  rocks  on 129, 136, 149, 161, 305 
Hunker  series,  character  and  distribution  of.      886 
correlation  of 891 
Hunt,  T.  S.,  on  Adirondacks  rocks 600, 648 
on  Animikie  group 261-262, 398 
on  Boston  rocks 572, 595 
on  Laurentide  Mountains 449 
on  Pennsylvania  geology 656, 712 
on  pre-Cambrian  rocks 62, 
69-71, 87-91, 104, 105-106 
on  Vermont  geology 565, 593 
Hunt,  T.  S.,  and  Logan,  W.  E.,  on  geology  of 
Canada 66-67, 104 
Hunters  Island,  rocks  on  and  near 236 
237, 275-276, 340-341, 372 
Huntington,  J.  II.,  on  Maine 553, 592 
Huntington,  J.  II.,  and  Hitchcock,  C.  H.,  on 
New  Hampshire 554-558, 593-594 
Hunts  Peak,  rocks  of 812, 828 
Huron  Bay  district,  rocks  in 147 
Huronian  period,  nature  of 91-92 
Huronian  series,  character  and  distribution 
of 42,  passim  68-216,  passim 
243-352, 362,  passim  384-548, 567, 573- 
575,586, 656, 659-680,674,680-081,691- 
692, 695, 720-721,  781,  785,  815, 820, 842 
correlation  of. . .  42, 57, 78-79, 94, 95, 163, 180, 185- 
187,  197,  208,  306-311,  314-315,  323-325, 
329-330,    357-362,    382-384,  441-443,  834 
definition  of 75, 82, 88, 94, 97, 296, 379-380 
deformation  of 93, 336-337 
fossils  in 100, 320 
gold  in 281 
igneous  rocks  in 91, 92, 97, 146, 154, 381-382 
Page. 
Huronian  series,  iron  in 71, 
120-121, 122, 137, 154, 185-186, 291-292, 295 
life  in 86, 191 
metamorphism  in 73 
relations  of 78-79, 
80, 83, 93, 126, 128, 182-183, 185, 285, 351- 
356,  360,  368-376,  437-439,  532,  537,  656 
sediments  in 91, 97 
segregation  of 59-60, 88 
subdivision  of 63, 97, 
100-101, 122, 127, 164, 173, 176, 189, 191,271, 
275, 289, 316, 323, 327, 328-329, 360, 370, 382- 
384,  410,  413,  432,  443,  492,  498, 539-540,  558 
unconformities  beneath,  in,  and  above. . .     163, 
315-316, 336, 351-356, 382-386,  437-438 
use  of  term 59-62, 406, 435, 659 
Huron  Mountains,  rocks  of 126, 147 
Hu-t'o  series,  character  and  distribution  of . . .  55-56 
correlation  of 56, 57 
Hutton,  rocks  near 424, 428 
Hutton, ,  law  of 29 
Hydroplastic  rocks,  character  and  distribu- 
tion of 64-66 
Hypozoic  rocks,  character   and  distribution 
of 562,653 
correlation  of 653 
use  of  term 62 
I. 
Idaho,  correlation  in 46 
pre-Cambrian  rocks  of 46, 849-852, 862, 864 
literature  of 849-852 
Idaho  Springs,  rocks  of 803 
Idaho  Springs  formation,  character  and  dis- 
tribution of 809-810, 827 
Iddings,  J.  P.,  Hague,  A.,  and  Weed,  W.  II., 
on  Eivingston  quadrangle 856, 898 
on  Yellowstone  Park 843,896 
Ignacio  Lakes,  rocks  in 832 
Igneous  rocks,  intrusion  of,  in  Archean  rocks. .        22 
origin  of 29-30 
India,  pre-Cambrian  rocks  of 54 
Indian  River  group,  character  and  distribu- 
tion of 46, 886 
correlation  at 46, 891 
Ingall,  E.  D.,on  Bruce  mines  district 429, 446 
on  mines  and  mining 270, 398 
Ingall,  E.  D.,  and   Dennis,  Theo.,  on   Bruce 
mines  district 431, 446 
Ingenica  River,  rocks  near 877 
Intrusive  rocks,  alteration  of 76 
Inwood  limestone,  character  and  distribution 
of 43,630,633 
correlation  of 633, 634 
Inyo  Range,  rocks  of 870 
Iona  Island,  rocks  of 639 
rocks  near ,. . . .      866 
Iowa,  rocks  of 197, 725-727 
Irasburg,  rocks  at 565 
Iron-bearing  member,  character  and  distribu- 
tion of 141-142, 185-186 
Iron-bearing  rocks,  description  of. .  121-122, 128-129 
See  also  Huronian;  Keewatin. 
Iron  group,  description  of 131-132, 133, 134 
Iron  Hill,  rocks  of 171, 172 
