206  INDEX    TO    PUBLICATIONS    OF    U.    S.    GEOL.    SURVEY,     [bull.  177. 
Carboniferous  rocks;  Otter  shale  of  Montana,  description  of,  and  fossils  from.  .Ann  20, 
in,  pp  295-296;  GF  55,  p  2;  GF  56,  p  2 
Oxmoor  sandstone  of  Alabama GF  35,  p  2 
Pahasapa  limestone  of  Black  Hills Ann  21,  iv,  pp  509-510 
Paine  shale  of  Montana,  description,  fossils,  and  sections  of .Ann  20, 
in,  pp  290-291,  329,  339,  362,  363;  GF  55,  p  2;  GF  b6,  p  2 
Pennington  shale  of  Virginia,  Kentucky,  and  Tennessee Bull  111,  p  37; 
GF  12,  p  3;  GF  27,  p  3;  GF  33,  p  2;  GF  40,  p  2; 
GF  46,  p  3;  GF  47,  p  2;  GF  53,  p  3;  GF  59,  p  4 
Pennsylvanian  series  of  Kentucky GF  47,  p  2 
of  Tennessee GF  53,  p  3 
peridotite  in  Kentucky,  age  of . Bull  38,  pp  28-29 
Permian  rocks  of  Grand  Canyon  district Ann  2, 
pp  64,  91-94;  Mon  n,  pp  16,  43-46, 117-121 
of  Kansas  and  Nebraska  and  other  parts  of  United  States,  discussions 
relative  to  the  correlation  of Bull  80,  pp  193-212 
of  Nebraska  (limestone) Ann  19,  iv,  p  738 
of  Plateau  country Ann  6,  pp  134-135,  184   1 85 
of  Texas Ann  21,  vn,  pp  102-103 
and  their  Mesozoic  types  of  fossils Bull  77 
Pickens  sandstone  of  West  Virginia GF  34,  p  2 
Pocahontas  formation  of  Virginia  and  West  Virginia GF  26, 
p3;  GF44,pp3,4-5 
Pocono  sandstone  of  Maryland,  Virginia,  and  West  Virginia GF  14,  pp  2-3; 
GF  28,  p  3;  GF  32,  pp  3-4;  GF  34,  p  2;  GF  61,  pp  4-5 
Potomac  and  Roaring  Creek  coal  fields  in  West  Virginia. .  .Ann  14,  n,  pp  567-590 
Pottsville  formation  in  Southern  Anthracite  coal  field,  Pennsylvania;  strati- 
graphic  succession  of  fossil  floras  of.  .Ann  20,  n,  pp  749-930 
Price  sandstone  of  Virginia  and  West  Virginia GF  26,  p  3;  GF  44,  p  3 
Princeton  conglomerate  of  Virginia  and  West  Virginia  Ann  17, 
ii,  pp  489-490;  GF  26,  p  3;  GF  44,  p  3 
Pugh  formation  of  West  Virginia GF  34,  p  2 
Pulaski  shale  of  Virginia  and  West  Virginia GF  26,  p  3 
Purgatory  conglomerate  of  Narragansett  Basin Mon  xxxm,  pp  364-374 
Quadrant  formation  of  Montana Ann  20,  in,  pp  294-298;  Bull  110, 
pp  39-43;  GF  1,  p  2;  GF  24,  p  2;  GF  55,  p  2;  GF  56,  p  2 
of  Yellowstone  Park Mon  xxxn,  n, 
pp  25,  32,  34,  36,  38,  41,  47,  48,  51, 160;  GF  30,  pp  1-2,  5 
Quinnimont  formation  of  southern  Appalachians,  relation  of,  to  the  Potts- 
ville   A  nn  20,  n,  p  815 
of  Virginia  and  West  Virginia GF  26,  p  3 
Raleigh  sandstone  of  Virginia  and  West  Virginia Ann  17, 
ii,  pp  493-494;  GF  26,  p  3;  GF  44,  pp  3,  5 
Red  Wall  group  of  Plateau  region,  features  of Ann  6,  pp  132,  183 
Red  Wall  limestone  of  Grand  Canyon  district,  age,  character,  and  thick- 
ness of Ann  2,  pp  151,  217 
Relief  quartzite  of  California -^ GF  66,  p  2 
Rico  formation  of  Colorado,  Rico  Mountains Ann  21,  n,  pp  28,  59-66 
Robinson  formation  of  California Ann  14,  n,  pp  447-448; 
Ann  17,  i,  pp  626-628;  GF  5,  p  1;  GF31,  p  1; 
GF  37,  pp  1,  3;  GF  39,  p  1;  GF  41,  p  1; 
GF  43,  p  1;  GF  51,  pi;  Ann  14,  n,  pp  447-448 
Rockcastle  conglomerate-lentil  of  Kentucky GF  46,  p  3;  G F  47,  p  2 
of  Tennessee GF  53,  p  3 
