warman.J  APORHYOLITE ARCHEAN.  143 
Aquamarine,  occurrence  and  statistics  of MR  L882,  p  487;  ME  1889-90, 
p448;  MR  L891,  p540;  Ml;  1892,  pp  765-766,  781;  MR  1893, 
pp  681,  682,  696-697;  Ann  16,iv,pp  604,605;  Ann  17,  in 
cont,  p923;  Ann  is,  v  cont,p  1217;  Ann  19,  vi  cont,  p  513; 
Ann  20,  vi  cont,  p  599;  Ann  21,  vi  cont,  pp  450-451,461 
Aqueous  action,  ore  concentration  by,  in  Colorado,  Cripple  Creek  district  ...Ann  16, 
ii,  pp  160-162 
Aqueous  vapor,  thermal  effect  of  action  of,  on  feldspathic  rocks Ann  2, 
pp  325-330;  Mon  m,  pp  290-308 
Aqui  .Mountains,  literature  of  geology  of Bull  86,  pp  296,  506 
Aquia  Creek  series  of  deposits  and  flora.' Ann  15,  pp  326-330,367-368 
Aquidneck  shales  of  Narragansett  Basin Mon  xxxiii,  pp  348-363 
Aquifoliaceae  of  Amboy  clays Mon  xxvi,  p  98 
Aquitanian  formation,  correlation  of Ann  18,  n,  p  341 
Aracese  from  Dakota  group Mon  xvn,  pp  38-39 
Arachnida  from  Rhode  I  .-land  coal  field Bull  101,  p  9 
Arachnids,  index  to  known  fossil,  of  the  world Bull  71 
systematic  review  of  our  present  knowledge  of Bull  31,  pp  19-31 
Arago  beds  of  Oregon \nn  17,  i,  pp  458-462; 
Ann  is.  [i,p343;  Ann  19, m, pp  319-320 
Aragonite,  occurrence  of MR  1883-S4,  p  777 
Aragonite  and  calcite,  format  ion  of,  in  caves Mon  vn,  p  95 
Aragonite  crystals,  measurement  of  grow  tli  of Mon  vnfpp  56-58 
Araliacese  of  Alaska Ann  17,  i,  p  888 
of  Amboy  clays .Mon  xxvi, pp  113-119 
of  Dakota  group Mon  xvn,  pp  127-136 
of  Laramie  group Bull  37,  pp  56-63 
of  North  America  (extinct)  Mon  xxxv, pp  121-123 
of  Yellowstone  Park Mon  XXXII,  [I,  pp  744-749 
Arapaho  beds,  correlation  of Bull  82,  p  231; 
I '.nil  83,  pp  136-137, 145-146;  Bull  84,  p  320 
•   of  Denver  Basin Mon  xxvn,  pp  31-32,  89, 151-155,  206-252 
Arbuckle  Ranges  of  (  hiachita  system \nn  21,  vn,  p  38 
A  rcadia  marl  of  Florida Bull  84,  pp  131-132,  320 
Archseopteryx,  comparison  of  Echthyornis  and  Hesperornis  with Ann  3,  pp  83-85 
Archean;   Laurent  ian  system,  history  of  the  term Bull  86,  pp  462,  470-474 
restriction  of,  to  gneissic  basement  terrain- Ann  7,  pp  450-452 
Archean  rocks;  Arvonian  of  Great  Lakes  region Bull  86,  pp  457,  462-463,  465,  474 
Basement  complex  of  Michigan,  Marquette  district Ann  15,  pp  489-516, 
631-632;  Mon  xxvm,pp  149-220,526-528,555 
Burnet  ian  series  ,  ,f  Texas - Bull  86,  pp  269, 474,  504 
Cambrian,  early,  and  pre-Cambrian  formations,  classification  of Ann  7, 
pp  371-454 
Carolina  gneiss  of  Washington,  D.  C,  quadrangle GF  70,  p2 
Central  granite  of  Michigan-Wisconsin,  Penokee  district... Mon  xix,  pp  111-116 
character,  origin,  delimitations,  and  stratigraphy  of Ann  16,i,pp  744-759 
( \ »1«  1 1  >r<  x  »k  gr< nip  <  »f  New  Brunswick Bull  86,  pp  230-238 
comparison  of,  with  Cretaceous  metamorphics Mon  xm,  pp  138,  458 
Coutchiching  series  of  Canada Bull  86,  pp  65-67,  68  passim 
Eastern  granite  of  Michigan-Wisconsin,  Penokee  district Mon  xix,  p  122 
Eastern  green  schist  of  Michigan-Wisconsin,  Penokee  district Mon  xix, 
pp  116-122 
Fernandian  system  of  Texas Bull  86,  pp  267-268,  269,  474,  504 
gneiss  of  Sierra  Nevada = Ann  17,  i,  pp  533-537,  700-705 
gneisses  of  Lake  Superior  district,  character  of Ann  10,  i,  pp  358-360; 
Mon  xix,  pp  107-111, 116-122 
