wakm  COLORADO      CONCRETION.  25] 
Columbia  formation,  correlation  of Vnn  IS,  11.  p  336 
description  of Ami  7,  pp  59-J  612, 635;   Ann  12,  i,  pp  384-407 
in  Delaware ' Bull  L38,  p  L19 
in  I  Ustrict  of  <  lolumbia GF  70,  pp  !  5 
in  Maryland ! \nn  7,pp  59-J  612,637  639; 
Bull  L38,  p  L26;  GF  13,  p  2;  GF  23  pp  1   2;  GF  70,  pp  I  5 
in  South  Carolina Bull  L38,  p  210 
in  Virginia Bull  L38,p  L64;  GF  L3,p2;  GF23,pp  I   2;  GF  70,  pp  I  5 
relation  of,  to  clays  of  Rhode  Island  and  Massachusetts Vnn  17,  i,  p  1004 
unconformity  between  Potomac  formation  and Inn  7,  pp  582  583 
Columbia  River,  profile  of WS  44,  p  97 
Columbia  River  lava  of  Idaho \nn  20,  in, pp  90  93 
of  Washington Lnn20,n,pp  129-134;   Bull  L08,  pp  20-22;  WS  I,  pp  10  50 
Columbite,  analysis  of,  from  Dakota,   Etta  tin  mine MR  1888,  p  I'd 
analysis  of,  from  North  ( larolina,  Alexander  County Bull  74,  p  7:> 
1' ron i    Nort  li  Carolina,  Mitchell  County Bull  74,  p  73 
Columnar  jointing  in   lava,  description  of,  as  one  of  the  educational  series  of 
rock  specimens Bull  150,  pp  256  258 
Columnar  Juratrias  lava  of  Sierra  Nevada Vnn  17,  i,  p  648 
Columnar  structure  of  basalt  in  volcanic  necks Vnn  0,  pp  17-    171 
of  obsidian  of  Yellowstone  Park Vnn  7.  p  257;   Men  sxxn,  n,  p  257 
Comal  River,  Texas,  flow  of,  measurements  of Ann  IS, 
iv,  l>  110;   Bull  I  10,   pp  84,86;  WS  28,  p  L30 
t  iomanche  Teak  limestone  of  Texas Vnn  18,  n,  p  226;  Ann  21, 
vii,  pp  211  216,  22:;  227;   GF  42,  p  2;    GF  64,  p   1 
Comanche  series  of  Texas Ann  L8,  ii, pp 218  238;   V.nn  21,  vii,  pp  128 
L92;   BulU64,ppl6  is;  Bull  82, pp  116, 118, 119  L21, 
L27, 130, 221,  223, 225,  229,  250,  253  254;  GF64,ppl-2 
Committees,  various,  appointment  of Ann  is,  i,  pp  l  I    i,"> 
Compressibility  of  liquids Bull  92 
Compressibility  and  thermal  expansion,  investigations  of Vnn  II,  i,  pp  L54   156 
Compression,  Appalachian  structure  due  to Vnn  13,  n,  p  217 
Compsognathus,  remarks  on,  and  restoration  of Vnn  Hi,  t.  p  22S 
( 'on i stock  lode,  alteration  of  minerals  in Mon  m,  p  20 
decomposition  products  from  chemical   analyses  of. Mon  [II,  pp  217   218 
description  of Vnn  I,  pp  39   Hi 
hi.-tory  of Vnn  I,  p  71;    Ann  2,  pp  xxxvii  -x\  \  viii 
mechanical  appliances  used  on Vnn  I,  pp  50-52,  72 
Comstock  lode  and  Washoe  district,  geology  of Vnn  2, 
PP  xxiv-xxvi,  201  330;  Mon  m 
Comstock  mine  waters,  analyst's  of Mon  in,  p  152 
Comstock  mining  and  miners Mon  iv 
Conasauga  shale  in  Alahama,  ( reorgia,  and  Tennessee GF  2,  p  I ;  GF  4,  p  2; 
GF6,  p  l;  GF  20,  p  2;  GF  25,  p  3;  GF  33,  p  2;  GF  35,p2 
origin  of  name Bull  81,  pp  246  217 
Concentration,  natural,  of  iron  ores  in  Penokee  district Mon  six, pp  285-290 
Conchifera  of  Bear  River  formation Bull  128, pp  32   II 
of  Chico-Tejon  series  of  California Bull  51,  pp  I  I    L5 
of  Cretaceous  of  Vancouver  Island Bull  51,  pp  ."»ii   1 1 
of  Meso/.oic  of  Alaska  Peninsula Hull  51,  pp  65-67 
of  North  America  (nonmarine  fossil) Vnn  .">,  pp  420-443 
of  Permian  of  Texan Bull  77,  pp  26  29 
of  Puget  group Bull  51,pp58  02 
Concho  River, Texas,  profile  of WS  II,  p  35 
Concretion  in  loess  from  Wray,  Colorado,  analysis  of Bull  MS,  p  297 
