FOR    THE    YEARS    1901-1905,  INCLUSIVE. 
497 
Geologic  formations  described — Continued. 
Antlers  sands,  Cretaceous,  Texas,  Hill 
(R.  T.),  3. 
Antrim.  Devonian,  Michigan,  Lane,  4. 
Antrim  shales,  Devonian,  Michigan. 
Russell,  6. 
Apache  group,  Cambrian (?),  Arizona. 
Ransome,  6,  13. 
Apache  group,  pre-Cambrian,  Arizona, 
Lee    (W.  T.i.  f>. 
Apishapa  formation,  Cretaceous,  Colo- 
rado, Hills,  1. 
Appanoose  beds,  Pennsylvania  series, 
Iowa,  Beyer  and  Young,  1. 
Appekunny  argillite,  Algonkian  Mon- 
tana, Willis,  6. 
Aquia  formation,  Eocene,  Tertiary, 
Maryland,  Shattuck,  5. 
Aquia  formation  or  stage.  Eocene, 
Maryland,  includes  Piscataway  and 
Paspotansa  members  or  substages. 
Clark  and  Martin,  1. 
Arago  formation,  Tertiary,  Oregon, 
Diller,  11. 
Arapahoe  formation,  Colorado,  Lee, 
(W.  T.),  2. 
Arapahoe  formation,  Tertiary,  Colo- 
rado, Darton,  16,.  18. 
Arbuckle  limestone,  Cambro-Silurian, 
Indian  Territory,  Taff,  3,  6,  13. 
Arbuckle  limestone,  Cambro-Ordovician, 
Oklahoma,  Gould,  13,  14. 
Arcadia  clays,  Tertiary,  Louisiana, 
Lercb,  2. 
Arietina  formation,  Cretaceous,  Texas, 
Dumble,  12. 
Arikaree  formation.  Tertiary,  Wyoming, 
Nebraska,  Adams  (G.  I.),  4. 
Arikaree  formation,  Miocene,  Tertiary. 
Nebraska,  Barbour  (E.  II.),  8. 
Arikaree  formation.  Neocene,  Tertiary, 
Wyoming,  Smith    ( W.  S.  T.  i .  1. 
Arikaree  formation,  Tertiary,  Nebraska, 
Darton.  10,  18. 
Arikaree  forma  (ion,  Tertiary,  South 
Dakota,  Reagan,  5, 
Arisaig  formation,  Silurian.  Canada, 
Ami,   10. 
Arizona  formation,  included  in  Hu- 
ronian.  Blake  (W.  P.),  1. 
Arkadelphia  beds,  Ci-etaceous,  Texas, 
Hill   (R.  T.),  3. 
Arkansan  series,  Carboniferous,  Ar- 
kansas, Keyes,  18. 
Arlington  diabase,  Juratrias,  New  Jer- 
sey, Merrill  and  others,  1. 
Armucnee  chert.  Devonian.  Georgia, 
Hayes,  ."">. 
Arnheim  beds.  Ordovician,  Ohio,  In- 
diana, and  Kentucky,  Foerste,  12. 
Arnheim  beds,  Ordovician,  Kentucky, 
Nickles,  G. 
Arundel  formation.  Cretaceous,  Mary- 
land, Clark  and  Bibbins,  1. 
Asbury  clay,  Tertiary,  New  Jersey, 
Kiimmel,  and  Knapp,  1. 
Bull.  301—06 32 
Geologic  formations  described — Continued. 
Atascodero  formation,  Cretaceous,  Cal- 
ifornia, Fairbanks,  7. 
Atchison  shales  (Wabaunsee),  Carbon- 
iferous, Nebraska.  Barbour  (E.  II.), 
8. 
Athens  shale,  Ordovician,  Tennessee, 
Keith,  9,  11. 
Atoka  formation.  Carboniferous,  In- 
dian Territory.  Taff,  2,  3. 
Atlantosaurus  oe&a,  Cretaceous,  Rocky 
Mountain  region,  Lee  (W.  T. ),  7. 
Atlantosaurus  beds.  Jurassic,  Colo- 
rado and  Wyoming,  Hatcher,   14. 
Atlantosaurus  beds,  Jurassic-Creta- 
ceous, Colorado  and  Wyoming,  Wil- 
liston,  !'."». 
Atwell  sand,  Devonian,  Pennsylvania, 
Fuller.  ::. 
Aubery   group,    Arizona,    Reagan.   3. 
Aubrey  and  Super-Aubrey.  Carbonif- 
erous, Utah,  Huntington  and  Gold- 
tlnvait,    1. 
Aubrey  limestone  and  sandstone,  Ne- 
vada, Spurr,    5. 
Aubrey  formation,  Utah,  Huntington 
and  Goldthwait.  2. 
Augusta  formation,  Carboniferous, 
Iowa,  Eckel  and  Bain,  1. 
Austin  chalk.  Cretaceous,  Texas,  Dum- 
ble, 12. 
Austin  chalk.  Cretaceous,  Texas,  Hill 
(R.  T.i.  ::. 
Austin  chalk,  Cretaceous,  Texas,  Hill 
and  Vaughan,  1. 
Austin  chalk,  Cretaceous,  Texas.  Pra- 
ther,  2. 
Avenal  sandstones,  Tertiary.  Califor- 
nia, Anderson,  7. 
Baird  shales.  Carboniferous,  Califor- 
nia, Diller.  12. 
Bakersville  gabbro.  Juratrias.  North 
Carolina,  Keith,  4. 
Bakersville  gabbro,  Triassict?),  North 
Carolina,    Keith,    12. 
Baltimore  gneiss,  Algonkian,  Pennsyl- 
vania, Bascom,  2. 
Baltimore  gneiss,  Maryland,  Mathews 
and  Miller,  1. 
Baltimore  gneiss,  Ordovician,  Pennsyl- 
vania,  Bascom,  3. 
Baltimore  gneiss,  pre-Cambrian,  Mary- 
land, Mathews,  G. 
Bandera  shales,  Carboniferous,  Kan- 
sas, Adams,  Girty,  and  White,  1. 
Bandera  shale,  Carboniferous,  Kan- 
sas, Adams,  Haworth,  and  Crane,  1. 
Bandera  shales.  Carboniferous,  Kan- 
sas, Beede  and  Rogers,  1. 
Bangor  limestone,  Carboniferous,  Geor- 
gia. Hayes,  5. 
Bangor  limestone.  Carboniferous,  Ten- 
nessee, Stevenson  (J.  J.),  4. 
Bangor  limestone,  Carboniferous.  Geor- 
gia, McCallie.  0. 
Baptanodon  beds,  Jurassic,  Wyoming, 
Williston,  25. 
