528 
INDEX    TO    NORTH    AMERICAN    GEOLOGY 
Geologic  formations  described — Continued. 
Oakville  Beds,  Neocene,  Texas,  Dumble, 
13. 
Oeala  limestone,  Tertiary,  Florida, 
Dall,  8. 
Oeala  nummilitic  limestone,  Tertiary, 
Florida,  Maury,  1. 
Oeoee  formation,  upper  Paleozoic,  Ala- 
bama, Smith   (E.  A.),  1. 
Ogallala  formation,  Tertiary,  Wyoming, 
Nebraska,  Adams  (G.  I.),  4. 
Ogallala  formation,  Pliocene  (?), 'Ter- 
tiary, Nebraska,  Barbour   (E.  H.),  8. 
Ogallala  formation,  Tertiary,  Nebraska, 
Darton,  10,  is. 
Ogallala  (  ?)  formation,  Tertiary,  South 
Dakota,  Reagan,  5. 
Ogden  ouartzite,  Nevada,  Spurr,  6. 
Ogden  quartzite,  Devonian,  Utah  and 
Nevada,  Berkey,  8. 
Ogishke  conglomerate,  Algonkian,  Min- 
nesota, Clements,  3. 
Obara  limestone,  Mississippian,  Ken- 
tucky, Ulrich,  8. 
Ohara  member,  Carboniferous  (Missis- 
sippian), Illinois,  Bain,  19. 
Ohio  shale,  Devonian,  Ohio,  Claypole,  5. 
Ohio  shale,  Devonian,  Ohio,  Prosser,  10. 
13. 
Ohio  shale,  Devonian,  Illinois,  Bain,  19. 
Obio  shale,  Devonian,  Illinois,  Ulrich,  8. 
Ohio  River  formation,  post-Carbonifer- 
ous   (Tertiary?),  Indiana,  Ashley,  2. 
Oil  Lake  group,  Devonian,  Pennsyl- 
vania, Stevenson  (J.  J.),  4. 
Olean  conglomerate,  Carbonic,  New 
York.  Clarke,  20. 
Olean  conglomerate,  Carboniferous 
New  York,  Glenn,  1. 
Olentangy  shale,  Devonian,  Ohio,  Pros 
ser,  10,  13. 
Olpe  shales,  Carboniferous,  Kansas 
Beede,  0. 
Olpe  shales,  Carboniferous,  Kansas 
Adams,  Girty,  and  White,  1. 
Onaga  limestone,  Carboniferous.  Kan 
sas,  Crevecoeur,  1. 
Oneida  Conglomerate,  Champlainie 
New  York,  Clarke,  20. 
Oneonta  beds,  Devonic,  New  York 
-      Clarke.  20. 
Oneota  limestone,  Iowa,  Beyer  and 
Williams,  2. 
Oneota  dolomite,  Ordovician,  Illinois, 
Bain,  11. 
Onondaga  limestone,  Devonian,  New 
York,  Grabau,  1,  9. 
Onondaga,  Ontario,  Parks,  4. 
Onondaga  limestone,  Devonian,  New 
Jersey,  Weller,  6. 
Onondaga  limestone,  Devonian,  New 
York,  Schneider,  1. 
Onondaga  limestone.  Devonian,  New 
York,  Van  Ingen  and  Clark,  1. 
Onondaga  limestone,  Devonic,  New 
York,  Clarke,  20. 
Geologic  formations  described — Continued. 
Onondaga  limestone,  Devonian,  Tennes- 
see, Foerste,  7. 
Onondaga  limestone,  Devonian,  New 
York,  Clarke  and  Luther,  1-3. 
Onondaga  formation,  Silurian,  Canada, 
Corkill,  2. 
Onondaga  limestone,  New  York,  Shimer, 
Ontaric,  New  York,  Clarke,  20. 
Oolagah  limestone,  Carboniferous.  In- 
dian Territory,  Adams,  Girty,  and 
White.  1. 
Opeche  formation,  Carboniferous,  Black 
Hills,  Darton,  1,  8. 
Opeche,  Permian,  Carboniferous,  South 
Dakota,  Ricbardson   (G.  B.),  2. 
Opeche  formation  (Permian?),  Carbon- 
iferous, Wyoming,  Smith  (W.  S.  To, 
1. 
Opeche  formation,  Carboniferous,  Black 
Hills  region  and  Wyoming,  Darton, 
16. 
Opeche  formation,  Carboniferous.  South 
Dakota,  Darton  and  Smith,  1. 
Opeche  formation,  Carboniferous,  Wy- 
oming,  South   Dakota,   Darton,   14. 
Opeche  formation,  Carboniferous,  Black 
Hills  region  and  Wyoming,  Darton. 
18. 
Opeche  formation.  Carboniferous,  Wy- 
oming, Darton  and  O'Harra,  1. 
Opeche  formation,  Carboniferous,  Wy- 
oming and  South  Dakota,  Darton,  20. 
Orange  sands,  Texas,  Dumble,  2. 
Orange  sand  (Lafayette)  formation. 
Tertiary  (Pliocene),  Mississippi, 
Logan,  2. 
Orca  series,  Alaska,  Schrader  and  Spen- 
cer, 1. 
Oread  limestone,  Carboniferous,  Kan- 
sas, Adams,  Girty,  and  White,  1. 
Oregon  bed,  Ordovician,  Kentucky,  Mil- 
ler (A.  M.),  4. 
Orindan  formation,  California.  Lawson 
and  Palache,  1. 
Orindan,  California,  Osmont.  1. 
Oriskanian,  Devonic,  New  York,  Clarke, 
20. 
Oriskany  sandstone,  Devonian,  Mary- 
land, Prosser,  3. 
Oriskany,  Ontario,  Parks,  4. 
Oriskany  beds,  Devonian,  New  York, 
Grabau,  9. 
Oriskany  beds,  Devonian,  New  YTork, 
Van  Ingen  and  Clark,  1. 
Oriskany  beds,  Devonic,  New  York, 
Clarke,  20. 
Oriskany  formation,  Devonian,  New 
Jersey,  Weller,  6. 
Oriskany  formation,  Devonic.  Mary- 
land, Schuchert,  7. 
Oriskany  formation,  Devonian,  Canada, 
Corkill,  2. 
Oriskany  limestone,  New  York,  Shimer, 
