warman.]  OREGON OTTRELITE.  595 
Orthoclase-gabbro,  thin  section  of,  from  Minnesota,  near  Lester  River Mon  v, 
pp  50-51 
thin  section  of,  from  Wisconsin,  Brunschweiler  River Mon  v,  pp  50-51 
Orthoclase-gabbro-diorite,   analyses   of,   from   Yellowstone   Park,   Hurricane 
Ridge Mon  xxxn,  n,  p  260;  Bull  148,  p  123;  Bull  168,  p  93 
Orthofelsite,  analysis  of,  from  Pennsylvania,  various  localities.  .Bull  136,  pp  34,  62,  78 
Orthophyre  tuff,  analyses  of,  from  California,  Plumas  County  (apotrachyte ) . .  Ann  17, 
i,  p  727 
Orthopteroidea  from  Rhode  Island  coal  field Bull  101,  pp  11-21 
Orthosilicates  of  dyad  bases,  chemical  constitution  of Bull  125,  pp  HS-74 
of  tetrad  bases,  chemical  constitution  of Bull  125,  pp  75-80 
Orton  (E.),  gypsum  or  land  plaster  in  Ohio ...ME  1**7.  pp  596-601 
quoted  on  ( Jincinnati  arch  or  anticline Ann  is,  i\,  p  ii's 
quoted  on  natural  gas  in  Ohio ...MR  L887,  pp  479-484 
rock  waters  of  Ohio \ini  lit,  rv,  i>|>  633-717 
Trenton  limestone  as  source  of  petroleum  and  inflammable  gas  in  Ohio 
and  Indiana Ann  8,  n,  pp  475  662 
Osage  River,  profile  of \\s  44.  p  72 
Osar  border  clay  of  Maine Mon  xxxiv,  pp  I  70,  L80,  468    169 
Osar  streams  and  osars  in  Alaska Mon  xxxiv,  pp  356  358 
Osars,  deposition  of,  by  subglacial  or  superficial  streams Mori  sxxiv,  pp  120   140 
in  North  and  South  Dakota Bull  144.  pp  53-54 
Osars  and  kames,  formation  and  characters  of.  especially  in  Maine Mon  \\\iv, 
pp  330  333,359-469,  H3   lis 
Osceola  till  in  Washington GF  54,  p  \ 
Osmiridium,  analyses  of,  from  Australia,  California,  Russia,  etc. ..MR  L883  84,p581 
Osmium-iridium,  statistics  of Ann  L9,  vi, p  271 
Ostracoda  from  the  Pleistocene  of  ( Jreal  Basin Bull  LI,  p  23 
Ostrea  sellseformis  beds  of  Alabama,  correlation  of Ann  IS,  n,  pp  343  3  1  I 
Ostreida>;  life  history  of  the  oyster Ann  4,  pp  317  333 
of  Bear  River  formation Bull  128,  pp  32-33 
of  Carboniferous  of  North  America Ann  4,  p  2SS 
of  Chico-Tejon  series  of  California Bull  51,  pp  14-15 
of  Colorado  formation Bull  L06,  pp  54-<5(> 
of  Cretaceous  of  North  America Ann  4,  pp  290-308 
of  Pacific  coast Bull  133,  p  34 
of  Jurassic  of  North  America Ann  4,  pp  289,  290 
of  marl  beds  of  New  Jersey Mon  ix,pp  29-41,  194-19(5,205-207.222-224 
of  Miocene  of  North  America Ann  4,  pp  312-314 
of  Miocene  marls  of  New  Jersey Mon  xxiv,  pp  27-30 
of  North  America,  review  of  the  (fossil) Ann  4,  pp  273-430 
nonmarine  fossil Ann  3,  pp  420-421 
of  Oligocene  of  North  America Ann  4,  pp  31 1 ,  312 
of  Pliocene  and  post-Pliocene  of  North  America Ann  4,  pp  314-316 
of  Tertiary  of  North  America Ann  4,  pp  309-316 
of  Texas  region Bull  151,  pp  23-32 
Oswego  River,  New  York,  flow  of,  measurements  of WS  36,  pp  188-190 
Otiorhynchidse,  Tertiary,  of  United  States Mon  xxi,  pp  29-65 
Otter  shale  of  Montana,  description  of  and  fossils  from Ann  20, 
in,  pp  295-296;  GF  55,  p  2;  GF  56,  p  2 
Otterdale  sandstones  in  Richmond  Basin Ann  19,  n,  pp  435-437 
Ottrelite,  analysis  of,  from  Maryland,  Frederick  County Bull  113, 
p  111;  Bull  148,  p  90;  Bull  168,  p  50 
