INDEX 
[Abbreviations:  Ann  =  Annual  Report;  Mon  =  Monograph;  Bull  =  Bulletin;  MR  =  Mineral  Resources- 
WS  =  Water-Supply  Paper;  GF  Geologic  Folio;  TF= Topographic  Folio;  Alaska  (1),  Alaska  (2), 
Nome  =  pamphlets  on  Alaska  catalogued  on  pages  114-115  of  tins  bulletin;  i  =  part  i,  n=part  n, 
etc.;   p  =  page,  pp  =  pages.J 
Aa  type  of  lava,  character  of Ann  4  p  95 
Abajo  Mountains,  Utah,  structure  and  rocks  of Ann  14, 11,  pp  215-217 
Abrasion  tests  of  road-building  stones Ann  16,  ir,  pp  328-340 
Abrasive  materials,  statistics  of ME  L882,  pp  476-181;  MR  1883-84,  pp  712-722; 
ME  L885,  pp  42S-  136;  MR  1886,  pp  581-594;  MR  1887,  pp 
552-554;  ME  1888,  pp  576-579;  MR  1889-90,  pp  456-460; 
ME  L891,  pp  552-556;  ME  1892, pp  748-755;  MR  1893,  pp 
670-679;  Ann  [6,  i\.  pp 586-594;  Ann  17,  in cont,  pp 927-950; 
Ann  L8,vcont,pp  1219-1231;  Ann  19,  vi  cont,  pp  515-533; 
Ann   20,  vi  cont,  pp  603-617;  Ann   21,  vi    cont,  pp  463-479 
Absaroka  district,  Wyoming,  geology  of GF  52 
Absaroka  Range,  Wyoming,  structure  of Bull  119,  pp  29-32 
Absaroka  Range  and  Two-ocean  Plateau,  igneous  rocks  of.  .Mon  xxxu,  11,  pp  269-325 
Absarpkite,  analysis  of,  from  Montana,  various  localities Mon  xxxu,  11,  p  352 
analysis  of,  from  Wyoming,  ( lark  Fork Ann  20,  in,  p  484 
from  Yellowstone  Park,  various  localities Mon  xxxn,  n,  p  329; 
Bull  14S,  pp  125,  129;  Bull  168,  pp  99, 103 
of  Yellowstone  Park  and  Montana Mon  xxxu,  11,  pp  328-339,  351-355 
thin  section  of,  from  Yellowstone  Park Mon  xxxn,  11,  pp  250-251 
Acadian  area  of  Newark  system Bull  85,  pp  19-20,80 
Acadian  province,  Paleozoic  formations,  upper,  in,  correlation  and  classifica- 
tion of  Bull  80,  pp  226-257 
(See,  also,  Canada.  I 
Acadian  series,  equivalents  of,  in  Alabama Bull  81,  p  305 
origin  of  name Bull  81,  p  248 
Accretion,  shaft,  analyses  of,  from  Colorado,  Leadville  district Mon  xir, 
pp  727-728;  730, 731 
Accretions  formed  in  blast  furnace Mon  xn,  pp  725-731 
Aceracere  of  Amboy  clays Mon  xxvi,  p  106 
of  Dakota  group Mon  xvn,  pp  156-158 
of  North  America,  extinct Mon  xxxv,  pp  115-116 
of  Yellowstone  Park Mon  xxxn,  11,  pp  735-736 
Acetabularise  from  Lower  Coal  Measures  of  Missouri Mon  xxx,  pp  1 1-13 
Acmite,  chemical  constitution  of Bull  125,  pp  87,  88,  92, 104 
Acmite-trachyte,  analysis  of,  from  Montana,  Crazy  Mountains Bull  90, 
p  71;  Bull  148,  p  145;  Bull  168, -p  123 
Actseonidge  from  Chico-Tejon  series  of  California Bull  51,  p  15 
from  Colorado  formation Bull  106,  pp  161-162 
from  Miocene  deposits  of  New  Jersey Mon  xxiv,  p  137 
.      *  117 
