214  INDEX    TO    PUBLICATIONS    OF    U.    S.    GEOL.    SUEVEY.      [bull.  177. 
Chemung-Catskill  formations,  history  of  discussions  concerning  correlation  of  .Bull  80, 
pp  121-134 
Chenevixite,  analysis  of,  from  England,  Cornwall Bull  20,  p  85 
analyses  of,  from  Utah,  Tintic  mining  district Ann  19, 
in,  p  700;  Bull  20,  pp  85-86 
Cherokee  slates  of  North  Carolina,  features  of Bull  81,  p  138 
Cherry  Creek  beds  of  Montana GF  24,  p  2 
Chert,  analysis  of,  from  Colorado,  Leadville  district Mon  xn,  pp  557,  602 
analysis  of,  from  Kansas,  Galena. .  .Bull  90,  p  63;  Bull  148,  p  253;  Bull  168,  p  250 
from  Missouri,  various  localities.  .Bull  90,  p  63;Bull  148,  p  252;  Bull  168,  p  250 
description  of  the  rock,  as  one  of  the  educational  series Bull  150,  pp  124-126 
from   Lake  Superior  iron-ore  districts  (ferruginous,  hematitic,  and  mag- 
netitic) Ann  15,  pp  566,  568, 570 
in  limestone  of  Penokee  series,  origin  of Ann  10,  i,  pp  367-369 
thin  section  of,  from  Michigan,  T.  47  N.,  R.  45  W.,  sec.  14  (concretionary)  .Ann  10, 
i,  pp  472-473;  Mon  xix,  pp  480-481 
from  Michigan,  T.  47  N.,  R.  45  W.,  sec.  41  (concretionary) Mon  xix, 
pp  480-481 
T.  47  N.,  R.  46  W.,  sec.  13  (sideritic  and  ferruginous) Ann  10, 
I,  pp  480-481;  Mon  xix,  pp  490-491 
sec.  16  (sideritic) Mon  xix,  pp  502-503 
from  Michigan-Wisconsin,  Montreal  River  (ferruginous  and  brecciated ) . Mon 
xix,  pp  492-493 
Montreal  River  (sideritic) . .  .Ann  10,  i,  pp  488-489;  Mon  xix,  pp  502-503 
from  Minnesota,  Gunflint  beds  (concretionary) Ann  10,  i,  pp  490-491; 
Mon  xix,  pp  500-501,  506-507 
Gunflint  beds  (ferruginous) Mon  xix,  pp  500-501 
Gunflint  beds  ( sideritic) Ann  10, 
i,  pp  486-487;  Mon  xix,  pp  498-499,  500-501 
from  Ohio,  Lawrence  County  (sideritic) Mon  xix,  pp  490-491 
from  Wisconsin,  T.  41  N. ,  R.  3  W. ,  sec.  14  (quartzose) Ann  10, 
i,  pp  474-475;  Mon  xix,  pp  482-483 
T.  45  N.,  R.  1  W.,  sec.  24  (ferruginous) Ann  10, 
i,  pp  482-483;  Mon  xix,  pp  494-495 
sec.  33,  NE.  I  (magnetitic  concretionary) Ann  10, 
t,  pp  490-491;  Mon  xix,  pp  504-505 
T.  46  N.,  R.  2  E.,  sec.  27,  SE.  \  (concretionary) Ann  10, 
i,  pp  480-481;  Mon  xix,  pp  492-493 
Chert  and  quartzite,  thin  section  of,  from  Michigan,  T.  47  N.,  R.  44  W.,  sec.  23 
(ferruginous) Mon  xix,  pp  518-519 
Chert  conglomerate,  thin  section  of,  from  Michigan,  T.  47  N.,  R.  45  W.,  sec.  14, 
S W.  \ Mon  xix,  pp  482-483 
Cherty  iron  carbonates,  action  of  water  in  formation  of Ann  10,  i,  p  395 
Cherty  limestone  of  Penokee  iron-bearing  series,  petrographic  character,  origin, 
etc Ann  10,  i,  pp  349,  365-369, 
446,  472,  480-490;  Mon  xix,  pp  127-142,  443-455 
Chesapeake  Bay  as  a  harbor Ann  13,  n,  pp  175-178 
geology  of  head  of Ann  7,  pp  537-646 
Chesapeake  formation,  correlation  of Ann  18,  n,  p  339 
of  Delaware Bull  138,  p  119 
of  Maryland-District  of  Columbia-Virginia,  Washington  quadrangle.  .GF  70,  p  4 
of  New  Jersey Bull  138,  pp  41-42 
of  Southern  States Ann  12,  i,  pp  410-412;  Bull  84,  pp  54,  68, 123-126, 
323;  Bull  138,  pp  126,  163-164;  GF  13,  p  3;  GF  23,  p  2 
Chesapeake  stage,  geologic  and  paleontologic  conditions  during.. Bull  84,  pp  186-187 
