386  INDEX    TO    PUBLICATIONS    OF    U.    S.    GEOL.   SUEVEY.     [bull.  177. 
Idaho-Montana  boundary  line,  law  relating  to  survey  of Ann  19, 1,  pp  87,  96 
surveys  for  location  of Ann  20,  i,  pp  106-107 
Iddings  (J.  P.),  a  group  of  volcanic  rocks  from  New  Mexico,  Tewan  Moun- 
tains, and  the  occurrence  of  primary  quartz  in  certain 
basalts Bull  66 
descriptions  of  rock  specimens  in  the  educational  series Bull  150, 
pp  146-148, 151-163, 177-181, 194-197,  209-211, 
215-217,    219-221,   223-224,  228-231,  233-241, 
243-244,  254-261,  298,  301-302,  331-333, 353-355 
eruptive  rocks  of   Electric  Peak  and  Sepulchre  Mountain,  Yellowstone 
National  Park Ann  12,  i,  pp  569-664 
igneous  rocks  of  Yellowstone  National  Park GF  30,  p  6 
microscopic  petrography  of  the  eruptive  rocks  of  Eureka  district,  Ne- 
vada  Mon  xx,  pp  335-406 
Obsidian  Cliff,  Yellowstone  National  Park Ann  7,  pp  249-295 
petrographic  character  of  pre-Cambrian  lavas  of  Grand  Canyon Ann  14, 
ii,  pp  520-524 
Iddings  (J.  P.)  and  Hague  ( A.) ,  development  of  crystallization  in  igneous  rocks 
of  Washoe,  Nevada,  with  notes  on  the  geology  of  the  dis- 
trict  Bull  17 
Iddings  (J.  P.)  and  others;  descriptive  geology,  petrography,  and  paleontol- 
ogy of  the  Yellowstone  National  Park Mon  xxxn,  n 
Iddings  (J.  P.),  Weed  (W.  H.),  and  Hague  (A.),  geology  of  the  Livingston 
quadrangle,  Montana GF  1 
Idocrase,  occurrence  and  statistics  of MR  1882,  p  492;  MR  1883-84,  p  767 
Igelstromite,  chemical  constitution  of Bull  125,  pp  68, 104 
Igneous  fusion  as  related  to  pressure,  investigation  of Ann  14,  i,  pp  157-158 
Igneous  fusion  and  ebullition,  experiments  in Bull  103 
Igneous  injections,  effect  of,  on  carbonaceous  strata  in  Richmond  Basin Ann  19, 
ii,  pp  411-413 
Igneous  phenomena  of  Colorado,  La  Plata  quadrangle GF  60,  p  11 
Igneous  rocks;  alteration,  hydro  thermal,  of  granite,  basalt,  and  rhyolite  in 
Idaho Ann  20,  in,  pp  174-186 
analysis  of,  from  California,  Mariposa  County ...  Bull  148,  p  220;  Bull  168,  p  209 
from  Utah,  Tintic  mining  district Ann  19,  in,  p  649 
assimilation  of  sedimentary  masses  by,  discussion  of Mon  xn,  pp  308-313 
classification  of,  discussion  of Mon  xn,  pp  319-321 
facts  bearing  on,  derived  from  study  of  rocks  of  Electric  Peak  and 
Sepulchre  Mountain,  Yellowstone  Park. .  .Ann  12,  i,  pp  660-663 
from  Alaska,  according  to  composition Ann  20,  vn,  pp  188-194 
from  Montana,  Little  Belt  Mountains Ann  20,  in,  pp  463-464 
crystalline  rocks,  ancient,  relations  of Ann  14,  i,  pp  99-101 
crystallization  in,  of  Nevada,  Washoe,  development  of Bull  17 
granite  and  pegmatite  in  process  of  differentiation  or  segregation. .  .Ann  18, 
in,  p  311 
physical  conditions  in  relation  to Bull  66,  pp  23-29 
unusual  course  of,  in  granitic  magma Ann  10,  i,  p  357 
decomposition  of,  in  Colorado,  Mosquito  Range Mon  xn,  p  356 
in  Nevada,  Washoe  district,  character  of .  .Mon  in,  pp  72-80,  209-218,  369-372 
of  constituents  of,  by  weathering Bull  62,  pp  213-214 
dike,  stock,  sill,  laccolith,  definitions  of Ann  21,  in,  pp  172-173 
effusive  rocks  of  Montana,  Little  Belt  Mountains Ann  20,  in,  pp  556-557 
of  Sierra  Nevada Ann  14,  n,  pp  484-493 
eruptive  origin  of  certain  Maryland  granites Ann  15,  pp  731-734 
