530 
INDEX    TO    NORTH    AMERICAN    GEOLOGY 
Geologic  formations  described — Continued. 
Payette  formation,  Tertiary,  Idaho, 
Russell,  5. 
Payette  formation.  Tertiary,  Idaho, 
Lindgren  and  Drake,  2. 
Payette  formation,  Oregon,  Russell,  21. 
Payne  formation,  Carboniferous,  Okla- 
homa, Kirk,  1. 
Peachbottom  slates,  Ordovician  (?), 
Maryland,  Mathews,  6. 
Pegram  limestone,  Devonian,  Kentucky 
and  Tennessee,  Foerste,  1. 
Pella  beds,  included  in  St.  Louis,  Car- 
boniferous, Iowa,  Udden,  5. 
Pella  beds,  included  in  St.  Louis,  Mis- 
sissippian  series,  Iowa,  Savage.  2. 
Pelly  gneisses,  Alaska,  Collier,  2. 
Pelly  gneiss,  Archean  (?),  Alaska, 
Prindle,  2. 
Pelona  schist  series,  California, 
Hershey,  8. 
Pendleton  sandstone,  Devonian,  In- 
diana, Siebenthal,  2. 
Pendleton  sandstone,  Devonian,  In- 
diana, Hopkins  (T.  C),  11. 
Pennington  shale.  Carboniferous,  Ten- 
nessee, Keith,  1. 
Pennington  shales,  Carboniferous,  Vir- 
ginia, Stevenson  (J.  J.),  4. 
Pensauken,  Quaternary,  New  York, 
Veatch,  4. 
Pensauken  formation,  Pleistocene,  New 
Jersey,   Salisbury,    1. 
Pensauken  formation,  Quaternary,  New 
Jersey,  Merrill  and  others.  1. 
Pensauken  formation,  Pleistocene,  New 
Jersey,  Kiimmel  and  Knapp,  1. 
Peorian  soil,  Quaternary,  Ohio,  Pros- 
ser,  10. 
Perry  formation,  Devonian.  Maine, 
Smith  and  Perry,  1. 
Perry  group,  Devonian,  Canada,  Ells 
(R.  W.),  17. 
Pescadero  sandstones,  Miocene,  Cali- 
fornia, Anderson    (F.  M.),  G. 
Peshastin  formation,  pre-Tertiary, 
Washington,  Smith  (G.  O.),  8,  13. 
Petersburg  formation,  Carboniferous, 
Indiana,  Fuller  and  Ashley,  1. 
Petit  Bourg  series,  West  Indies,  Spen- 
cer (J.  W.),  2. 
Phelps  sandstone,  Carboniferous,  Mis- 
souri, Weller,  1. 
Phelps  sandstone,  Carboniferous,  Mis- 
souri, Adams  (G.  I.),  3. 
Phoenix  limestone  lentil,  Carbonifer- 
ous, Utah,  Keith,  13. 
Picayune  andesite,  Colorado,  Cross  and 
Howe,  1. 
Pierre  shale,  Cretaceous,  Black  Hills. 
Darton,   1,  8. 
Pierre  shale,  Cretaceous,  Colorado, 
Hills,  1. 
Pierre  formation,  Cretaceous,  North 
Dakota,  Babcock,  2. 
Pierre  shales,  Cretaceous,  Colorado, 
Hatcher,  6. 
Geologic  formations  described — Continued. 
Pierre  formation,  Cretaceous,  Nebraska, 
Barbour   (E.  IL),  8. 
Pierre  shale,  Cretaceous,  South  Da- 
kota, Todd  (J.  E.),  9-11,  15. 
Pierre  shale,  Cretaceous,  Black  Hills 
region,  Wyoming  and  Colorado,  Dar- 
ton, 1G,  18. 
Pierre  shale,  Cretaceous,  South  Da- 
kota, Darton  and  Smith,  1. 
Pierre  shale,  Cretaceous,  South  Da- 
kota, Todd  and  Hall,  2,  3. 
Pierre  shale,  Cretaceous,  Wyoming, 
Darton,  14. 
Pierre,  Cretaceous,  North  Dakota, 
Leonard,   4. 
Pierre  formation,  Cretaceous,  Colorado, 
Fenneman,  10. 
Pierre  shales,  Cretaceous,  South  Da- 
kota, Reagan,  5. 
Pierre  shale,  Cretaceous,  Wyoming  and 
South  Dakota,  Darton  and  O'Harra, 
1. 
Pierson  limestone,  Carboniferous,  Mis- 
souri, Weller,  1. 
Piketown  gravels,  Tertiary,  Missouri, 
Maibut,  1. 
Pilarcitos  sandstone,  California,  Law- 
son   (A.  C),  0. 
Pinal  schists,  pre-Cambrian,  Arizona, 
Ransome,  G,  10,  11,  13,  14. 
Pinal  schist,  pre-Cambrian,  Arizona, 
Lindgren,  28,  29. 
Pine  Hill  quartzite,  Silurian,  Eckel,  6. 
Tinkard  formation,  Cretaceous,  Ari- 
zona, Lindgren,  28,  29. 
Pinole  tuffs,  California,  Lawson  (A. 
C),  9. 
Pioneer  shale,  Cambrian  (?),  Arizona, 
Ransome,  13. 
Pipestone  beds,  Tertiary,  Montana, 
Douglass,  4. 
Piqua  limestone,  Carboniferous,  Kan- 
sas, Adams,  Haworth,  and  Crane,  1. 
Piscataway  member  or  substage,  Eo- 
cene, Maryland,  included  in  Aquia 
formation  or  stage,  Clark  and  Mar- 
tin,   1. 
Pismo  formation,  Neocene,  California, 
Fairbanks,  7. 
Pit  formation,  Triassic,  California,  Dil- 
ler,  12. 
Pitkin  limestone,  Carboniferous,  Arkan- 
sas, Adams   (G.  I.),  15. 
Pitkin  limestone,  Carboniferous,  Arkan- 
sas, Ulrich,  5. 
Pitkin  formation,  Carboniferous,  In- 
dian Territory,  Taff,  17. 
Pitkin  limestone,  Mississippian,  Arkan- 
sas, Adams  and  Ulrich,  1. 
Pittsburg  red  shale,  Carboniferous, 
West  Virginia,  White  (I.  C),  7. 
Pittsburg  sandstone,  Carboniferous, 
West  Virginia,  White    (I.  C),  7. 
Pittsburg  limestone,  Carboniferous, 
Ohio,  Orton  and  Peppel,  1. 
