INDEX. 
917 
Page. 
Iron  Mountain,  fossils  in 154 
ores  of 736-738 
rocks  of 138, 734-735, 738-739, 834, 847 
Iron  ores,  description  of 117-118 
horizons  of 210 
origin  and  development  of 123, 
129,149, 210, 226-227, 250, 300-301, 311, 321, 322 
Iron  River,  rocks  near 338, 359, 362 
Ironton  Park,  rocks  near 822 
Ironwood  formation,  character  and  distribu- 
tion of 337 
correlation  of 328-329 
Irving,  J.  D.,  Cross,  W.,  and  Howe,  E.,  on 
Ouray  quadrangle 823, 896 
Irving,  J.  D.,  and  others,  on  NeedleMountains 
quadrangle 822, 896 
Irving,  R.  D.,  nomenclature  by 377 
on  Archean 183, 308-311, 392, 401 
on  Baraboo  rocks 718, 750 
on  Black  Hills  rocks 732,  75 1 
on  classification  of  early  rocks 84-87, 105 
on  copper-bearing  group 301-307, 401 
on  Fox  River  rocks 722, 750 
on  greenstones  of  Marquette  and  Menomi- 
nee districts 139-140 
on  Iluronian  . .  187, 312-313, 392, 402, 408-409, 438 
on  Lake  Superior  iron  ores 311, 402 
on  Lake  Superior  stratigraphy 368-370 
on  Necedah  rocks 724, 750 
on  pre-Paleozoic  rocks 62 
on  slates  of  Potato  River 184 
on  Wisconsin  geology 180-182, 
185-187, 192, 392,  396, 71 7-718, 721,  749, 750 
work  of 330 
Irving,  R.  D.,  and  Chamberlin,  T.  C,  on  con- 
tact on  Keweenaw  Point. .  135-136, 388 
Irving,  R.  D.,  and  Van  Hise,  C.  R.,  on  Huro- 
nian  rocks 308, 401 
on  Penokee  series 140-144, 388 
on  Wisconsin  Valley 190, 390 
Irving  greenstone,  character  and  distribution 
of 822, 825, 830-831 
Ishpeming,  rocks  at 145, 148 
Ishpeming  formation,  character  and  distribu- 
tion of 158 
correlation  of 169 
Island  Lake,  rocks  on 532 
Isle  Parisienne,  rocks  of 273 
Isle  Royal,  rocks  of 109, 
111,113,11:).  116,119,162,257,300,304,341 
Itacolumite  group,  character  and  distribution 
of 688 
segregation  of 89, 90 
subdivision  of 688 
Jacks  Creek,  rocks  on 837 
Jackson,  C.  T.,  on  Keweenaw    Point  sand- 
stone    111-112, 387 
on  Lake  Superior  sandstone 119, 387 
on  Maine  geology 552, 592 
on  Massachuset  t.s  geology 570-571 ,  594 
on  New  Hampshire  geology 553-554, 592 
on  New  Jersey  geology 636, 652 
on  Rhode  Island  geology . 583, 596 
Jackson,  C.  T.,  and  Alger,  Francis,  on  Nova 
Scotia 503-504, 522 
Page. 
Jacobsville  sandstone 365 
Jaggar,  T.  A.,  jr.,  on  Black  Hills  rocks 732, 751 
Jaggar,  T.  A.,  jr.,  and  Palache,  Charles,  on 
Bradshaw  Mountains  quadran- 
gle   777,892 
Jalisco,  rocks  of 763 
James  Bay,  rocks  of 530-531, 540 
Jameson,  Professor,  on  Baffin  Bay  region..  527,548 
Jameson,  Professor,  Leslie,  John,  and  Murray, 
Hugh,  on  north  Canada  rocks. .  527, 548 
James  River,  rocks  on 674, 694, 724-725 
Jamiltepec,  rocks  near 763 
Janet,  Lake,  rocks  of 598 
Japan,  pre-Cambrian  rocks  of 57 
Jasper,  rocks  at 690 
Jatulian  rocks,  character  of 52 
Jefferson  Canyon,  rocks  in 856, 864 
Jefferson  Range,  rocks  of 855 
Jenny  Jump  Mountains,  rocks  of. .  639,641-642,645 
Jerome,  rocks  at 777 
Jessup,  A.  E.,  on  Adirondack  geology 597, 647 
Joachim  Falls,  rocks  near 448 
John  River,  rocks  on 887 
Johnston,  J.  F.  E.,  on  Abitibi  region 541, 551 
on  Lievre  River 473, 483 
Johnston,  J.  F.  W.,  on  New  Brunswick  geol- 
ogy   490, 520 
Jones,   H.   L.,  Herrick,   C.  L.,   and   Tight, 
W.  G.,  on  Ontario  rocks. . .  267-268, 398 
Jones,  S.  P.,  on  Georgia  rocks 691 
Jotnian  rocks,  character  of 51 
Jukes,  J.  B.,  on  Newfoundland 514-515, 524 
Julien,  A.  A.,  on  Adirondack  rocks 600, 648 
Junction,  rocks  near 194 
Junction  Mountains,  rocks  of 780 
Junction  Valley,  rocks  of 855 
Juniper  Mountains,  rocks  at 772 
K. 
Kabinakagami,  rocks  near 540 
Kaibab  Plateau,  rocks  of 771 
Kalevian  rocks,  character  of 52 
correlation  of 53 
Kaministiquia  River,  rocks  on 255,257,300 
Kaministiquia  series,  character  and  distribu- 
tion of 273, 316, 318 
Kane,  E.  K.,  on  Peabody  Bay  region 529, 549 
Kansas  City,  rocks  at 740 
Kasba  Lake,  rocks  near 540 
Katarchean  rocks,  character  of 52 
correlation  of 53 
Kawagansikok,  rocks  near 275 
Kawishiwin  formation,  character  and  distri- 
bution of 214, 232, 236, 250 
Kawishiwi  River,  rocks  on. . ..  208, 21 7---1  is. ■_'.;_>. 236 
Kay,  G.  M..  on  Abitiki  region 431,446 
Kazan  River,  rocks  on 539 
Kearsarge,  Mount,  rocks  of 557 
Kearsarge  conglomerate,  copper  and 153-154 
Kearsarge  group,  character  and  distribution 
of. 557, 558 
Keating,  W.  II.,  and  Vanuxem,  Lardner,  on 
Franklin  geology 635,  651 
Keene  Center,  rocks  of 607 
Keeseville,  rocks  near 608 
Keewatin  district,  rocks  of 536  537, 5  11 
