516 
INDEX    TO    NORTH    AMERICAN    GEOLOGY 
Geologic  formations  described— Continued. 
Hunton  limestone,  Indian  Territory, 
Taff,  3. 
Hunton  limestone,  Siluro-Devonian, 
Indian  Territory,  Taff,   6,   13. 
Huron  group,  Mississippian,  Indiana, 
Hopkins  (T.  C),  11. 
Huron  group,  Lower  Carboniferous, 
Indiana,   Ashley,   2. 
Huron  limestone  and  sandstone.  Car- 
boniferous, Indiana,  Hopkins  (T.  C), 
8. 
Huron  shale,  Devonian,  Ohio.  Prosser, 
10. 
Huronian,  Ontario,  Bolton,  1. 
Huronian,  Canada,  Coleman,  6. 
Huronian,  Willmott,  2. 
Huronian  (Lower),  Minnesota,  Clem 
ents,  3. 
Huronian,    Ontario,   Graton,~2. 
Huronian  (Upper)  (Animikie),  Min- 
nesota, Clements,  3. 
Huronian  series  (Lower  i,  Algonkian, 
Minnesota,  Leith,  4. 
Huronian  series  (Upper),  Algonkian, 
Minnesota,    Leith,   4. 
Huronian,  Canada.  Barlow,  8. 
Idaho  formation,  Tertiary,  Idaho, 
Russell,  5. 
Idaho  formation,  Tertiary,  Idaho.  Lind- 
gren  and  Drake,  2. 
Idalia  shale,  Tertiary,  Missouri,  Mar- 
but,  1. 
Ignacio  quartzite,  Cambrian,  Colorado, 
Cross   I  W.>.  5,  7. 
Ignacio  quartzite.  Cambrian,  Colorado, 
Cross  and  Howe,  1,  3. 
Illinoian,  Pleistocene,  Iowa,  Udden,  2. 
Illinois  drift,  Quaternary,  New  Jersey, 
Salisbury  and  others,  1. 
Illinoisan  drift,  Quaternary,  Leverett, 
4. 
Illinoian  drift,  Quaternary,  Ohio,  Pros- 
ser,  10. 
Illinoian,  Pleistocene,  Iowa,  Beyer  and 
Williams,  2. 
Illinoian  drift.  Quaternary,  Indiana 
and  Illinois,  Fuller  and  Clapp,  2. 
Illinoian  stage,  Pleistocene,  Iowa.  Ud- 
den   (Jon  A.  I.   1 . 
Incarnacion  clays,  Carboniferous,  New 
Mexico,  Herrick   (C.  L.),  3. 
Independence,  Devonian,  Iowa,  Nor- 
ton, 1. 
Independence  shales,  Devonian,  Iowa, 
Beyer  and  Williams,  2. 
Inglerield  formation,  Carboniferous,  In- 
diana, Fuller  and  Clapp,  2. 
Iola  limestone.  Carboniferous,  Kansas. 
Adams,  Girty,  and  White,  1. 
Iola  limestone.  Carboniferous,  Kansas, 
Adams,  Haworth,  and  Crane,  1. 
Iola  beds,  Carboniferous,  Kansas, 
Wooster,  1,  2. 
Iowan  drift,  Pleistocene,  Iowa,  Norton, 
1. 
Geologic  formations  described— Continued. 
Iowan,  Quaternary,  New  Jersey,  Salis- 
bury and  others,   1. 
Iowan  drift,  Quaternary,  Iowa,  Savage, 
3. 
Iowan  drift  (  ?),  Quaternary,  Ohio,  Pros- 
ser, 10. 
Iowan  loess,  Quaternary,  Iowa,  Calvin, 
10. 
Iowan    till,    Quaternary,    Iowa,    Calvin, 
10. 
Iowan,    Pleistocene,    Iowa,    Beyer    and 
Williams,    2. 
Iowan    deposits.    Quaternary,     Indiana 
and  Illinois,  Fuller  and  Clapp,  2. 
Iowan    stage,    Pleistocene,    Iowa,    Sav- 
age, 7,  8. 
Iowan  stage,   Pleistocene,   Iowa,  Udden 
(Jon  A.),   1. 
Iowan    stage,    Pleistocene,    Iowa,    Wil- 
liams  (I.  A.).   1. 
Irondale  limestone,  Carboniferous,  West 
Virginia,  White   (I.  C),  7. 
Iron  Mountain  conglomerate,  Cambrian, 
Missouri,  Keyes,  6. 
Iron  Mountain  porphyry.  pre-Cambrian, 
Missouri,  Adams  (G.  I.),  3. 
Irving  formation,  Colorado,   Howe,  3. 
Irving  greenstone,  Colorado,  Cross  and 
Howe,  3. 
Ithaca    group,     Devonian,     New     York, 
Clarke    (J.   M.),   11. 
Ithaca  beds,  Devonic,  New  York,  Clarke, 
20. 
Ithaca    flags   and   sandstone,   Devonian, 
New  York.  Clarke  and  Luther,  3. 
Izard   limestone,   Ordovician,   Missouri, 
Adams   (G.  I.),  3. 
Izard  limestone,  Ordovician,  Arkansas, 
Adams    (G.   I.),   15. 
Izard  limestone,  Ordovician,  Arkansas, 
Ulrich.   5. 
Jackfork    sandstone,     Silurian,     Indian 
Territory,  Taff,  3. 
Jackson,    Tertiary,    Louisiana,    Yeatch, 
2,  :;. 
Jackson  stage,  included  in  Eocene,  Ter- 
tiary, Louisiana.  Harris,  2. 
Jaskson     stage,     Tertiary,     Louisiana, 
Casey,  1. 
Jackson     sta^e.     Tertiary,      Louisiana, 
Casey,  2. 
Jackson   limestone,   Tertiary,   Alabama, 
Maury,  1. 
Jacksonboro  white  limestone,  Tertiary, 
Florida,  Dall,  8. 
Jacob    sands,    Quaternary,    New    York, 
Fuller,   28. 
Jameco  gravels,  Quaternary,  New  York, 
Veatch,  4. 
Jameco  gravel,  Quaternary,  New  YTork, 
Fuller,  29. 
Jefferson  City  formation,  Cambro-Ordo- 
vician.  Missouri,  Pall.  1. 
Jeffersi-n    City    formation.    Ordovician, 
Missouri,  Ball  and  Smith,  1. 
