920 
INDEX. 
Page. 
Larch  River,  rocks  on 539 
Larder  Lake  district,  rocks  of 433-434, 440 
Lascie  Harbor,  rocks  on 515 
Las  Vegas,  rocks  of 768 
Laurel,  rocks  near 668 
Laurentian  continent,  description  of 101-102 
location  of 16 
Laurentian  district,  correlation  in 42 
rocks  of 42 
Laurentian  series,  character  and  distribution 
of 27,  42-46,  passim  66-128, 
passim  180-341,  384,  passim  405-548, 
599-600,  627,  629,  656-659,  674,  676, 680, 
691-692,  743,  785,  815,  820,  833,  842,  875 
correlation  of 42, 
43,  46,  57,  78-79,  87,  185, 199-200,  236,  317, 
319, 329-339, 357-359, 443, 552, 618, 833, 835 
with  foreign  rocks 50, 53, 87 
definition  of 28, 59, 
75, 82,  S3, 87, 97, 173-174, 296, 325, 376-377 
graphite  in 72 
intrusive  rocks  of 28, 33, 76, 78 
life  in 69, 190-192 
limestone  in 69 
metamorphism  in 71, 73 
origin  of 83, 91 
relations  of 78-79, 80, 83, 93, 126, 
128, 182, 184-185, 285, 354-356, 368-376, 
415,  431-437,  438,  492,  530,  532,  537, 600 
segregation  of 27, 59-60 
subdivision  of 87,92,97, 
100, 127, 176, 207, 271, 413, 417, 450, 497, 498 
use  of  term 59-62, 449, 450 
Laurentide  Mountains,  rocks  of 59, 68, 449, 450 
Lawson,  A.  C,  nomenclature  by 377-378 
on  anorthosite  rocks 215-216, 395 
on  California  rocks 872, 869 
on  Canadian  rocks 270-271, 399 
on  Eparchean  interval 38 
on  laccolithic  sills . .    277-278, 399 
on  Lake  of  the  Woods  region 265-267, 
268,270,398 
on  Lake  Superior  rocks.  316-317, 371-372, 375-376 
on  Minnesota  geology 218-219 
on  Pooh-Bah  Lake 280 
on  Saganaga  Lake 273, 399 
on  term  ' '  Algonkian  " 322-323, 402 
on  White  Gravel  River 278, 399 
Lebanon,  rocks  near 582 
Leeds,  A.  R.,  on  Adirondack  rocks 600, 648 
on  Pennsylvania  rocks 655-656, 712 
Lee  gneiss,  character  and  distribution  of 578-579 
correlation  of 591 
Leech  Lake,  rocks  near 421 
Leith,  C.  K.,  field  work  of 14 
on  Cuyuna  range 251-252, 397 
on  Gogebic  and  Mesabi  ores 322, 402 
on  Lake  Superior  region 328, 402 
on  Lake  Superior  stratigraphy 374, 375 
on  Mesabi  district 243-246, 396 
on  Moose  Mountain  iron  range 427-428, 446 
Leith,  C.  K.,  and  Hobbs,  W.  H.,  on  Fox 
River  rocks 722, 750 
Leith,  C.  K.,  and  Van  Hise,  C.  R.,  on  Colorado 
rocks 814, 817-818, 895 
on  Lake  Huron  rocks 425-426, 438, 446 
Page. 
Leith,  C.  K.,  and  Zapffe,  Carl,  on  Minnesota 
geology 375 
Leith,  C.  K.,  and  others,  on  Lake  Superior 
region. .  173-174, 251, 293, 294-295, 390-391 
Leith,  C.  K.,  Van  Hise,  C.  R.,  and  others,  on 
Lake  Temagami-Onaping  River 
region 428-429, 446 
Le  Mars,  rocks  at 725 
Lenk,  H.,  and  Felix  J.,  on  Mexican  rocks  756-757, 765 
Lesley,  J.  P.,  on  Pennsylvania  geology 658, 
659-660, 664, 712 
Leslie,  J.,  Jameson,  Professor,  and  Murray,  H., 
on  north  Canada  rocks 527, 548 
Les  Saints  Anges,  rocks  of 486-487 
Levis  formation,  character  and  distribution  of     484 
Lewes  River,  rocks  on 536 
Lewis,  J.  V.,  and  Pratt,  J.  H.,  on  North  Caro- 
lina corundum 683, 715 
Lewisian  rocks,  age  of 29 
character  of 48-50 
correlation  of 49-51 
deformation  of 50 
Lewis  Range,  rocks  of 858-859, 861-862, 864 
Lewiston,  rocks  near 851 
Lieber,  O.  M.,  on  Itacolumite  group 89 
on  Labrador  rocks 530, 549 
on  South  Carolina  rocks 688-689, 716 
Lieber,  O.  M.,  and  Emmons,  E.,  on  Appa- 
lachian geology 710-711 
Lievre  River,  rocks  on 473, 483 
Life,  antiquity  of 34-35,86, 95 
evidences  of 34-35, 68, 69, 80, 86-87, 92, 459 
Lime,  lack  of 103 
Limestones,  origin  of 82 
Limpea  Mountains,  rocks  of 744 
Lincoln,  Mount,  rocks  on 803 
Linden,  Lake,  rocks  at 152 
Lindgren,  Waldemar,  on  Bitterroot  and  Clear- 
water mountains 850, 897 
on  Clifton  quadrangle 777,892 
on  Idaho  and  Oregon  rocks 851, 897 
on  Lower  California  rocks 762 
on  Oregon  rocks 867, 898 
work  of 14, 15 
Lindgren,  W.,  and  Graton,  L.  C,  on  Appa- 
lachian gold  and  tin 683-684, 715 
on  New  Mexico  rocks 770, 891 
Lindgren,  W.,  and  Ransome,  F.  L.,  on  Crip- 
ple Creek  district 811-812, 894 
Linville  metadiabase,  character  and  distribu- 
tion of 44, 682, 684, 703 
Lisbon  group,  correlation  of 587 
Literature,  general,  summary  of 64-107 
Lithology,  use  of,  in  classification 84 
Little,  George,  on  Georgia  rocks 690, 716 
Little  Belt,  rocks  near 855 
Little  Belt  Mountains,  rocks  of 855, 
857-858,860-861,864 
Little  Cottonwood  River,  rocks  on 196 
Little  Current  River,  rocks  on 545 
Little  Falls,  rocks  at  and  near 198, 338, 615-616 
Little  Rocky  Mountains,  rocks  of 857 
Little  Whale  River,  rocks  at 532, 534, 547 
Livingston,  rocks  near 860 
Livingston  quadrangle,  rocks  of 856, 898 
