﻿128 
  

  

  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  

  Gabbros, 
  13, 
  36 
  

  

  Genesee 
  river, 
  27, 
  83, 
  113 
  

  

  Genesee 
  shale, 
  12, 
  56 
  

  

  Geolagy, 
  denned, 
  7 
  

  

  Geologic 
  time 
  scale, 
  11 
  

  

  Geology, 
  denned, 
  7 
  

  

  George, 
  Lake, 
  104 
  

  

  Georgian 
  slate 
  and 
  quartzite, 
  13 
  

  

  Glacial 
  boulders, 
  94 
  

  

  Glacial 
  lakes, 
  extinct, 
  105 
  

  

  Glacial 
  period, 
  87-117; 
  duration, 
  114 
  

  

  Gorges, 
  107 
  

  

  Gouverneur 
  marble, 
  30 
  

  

  Grabau, 
  A. 
  W., 
  cited, 
  82, 
  113 
  

  

  Granite, 
  13, 
  34 
  

  

  Great 
  Lakes, 
  history, 
  96-101 
  

  

  Great 
  Lakes 
  region, 
  upward 
  move- 
  

   ment, 
  117 
  

  

  Green 
  mountains, 
  47, 
  48 
  

  

  Greenwood 
  lake, 
  104 
  

  

  Grenville 
  formation, 
  20-33; 
  distri- 
  

   bution, 
  thickness, 
  and 
  age, 
  31 
  ; 
  up- 
  

   lift, 
  37 
  

  

  Grenville 
  metamorphosed 
  sediments, 
  

  

  i*3 
  

  

  Grenville 
  ocean, 
  life 
  in, 
  32 
  

   Ground 
  moraine, 
  94 
  

   Guelph 
  dolomite, 
  12, 
  54 
  

   Gulfs, 
  112 
  

  

  Hamilton 
  shale, 
  12, 
  56 
  

  

  Hans 
  creek, 
  in 
  

  

  Havana 
  glen, 
  114 
  

  

  Helderberg 
  escarpment, 
  16, 
  21, 
  52, 
  

  

  55 
  

   Helderberg 
  limestone, 
  12, 
  55 
  

   Highlands-of-the-Hudson, 
  24, 
  48, 
  

  

  49; 
  Grenville 
  formation, 
  29, 
  31; 
  

  

  igneous 
  activity, 
  36 
  

   Hudson 
  river, 
  26, 
  79, 
  84; 
  lower 
  

  

  channel 
  submerged, 
  116; 
  pregla- 
  

  

  cial, 
  in 
  

   Hudson 
  river 
  shales 
  and 
  sandstones, 
  

  

  46 
  

   Hudson 
  valley, 
  inner 
  gorge, 
  85 
  

   Hudson 
  valley 
  province, 
  23-25 
  

  

  Ice 
  age, 
  87-117; 
  duration, 
  114 
  

   Igneous 
  activity, 
  early 
  Precambnic, 
  

   33-36 
  

  

  Igneous 
  rocks, 
  8, 
  13 
  

   Illinois 
  river, 
  99 
  

   Iroquois, 
  Lake, 
  100, 
  101 
  

   Iroquois 
  beaches, 
  117 
  

  

  Jurassic 
  period, 
  63, 
  64 
  

  

  Kames, 
  95 
  

   Kennyetto 
  creek, 
  in 
  

   Kettle 
  holes, 
  93 
  

  

  Labradorean 
  ice 
  sheet, 
  88 
  

   Lakes, 
  see 
  specific 
  names 
  of 
  

   Lakes, 
  Great, 
  see 
  Great 
  Lakes 
  

   Lansing 
  Kill 
  lake, 
  106 
  

   Laurentian 
  granite, 
  34 
  

   Laurentide 
  ice 
  sheet, 
  88 
  

   Little 
  Falls, 
  19, 
  20, 
  43, 
  73, 
  101 
  

   Little 
  Falls 
  dolomite, 
  13, 
  43, 
  44 
  

   Little 
  Falls 
  gorge, 
  108 
  

   Lockport 
  dolomite, 
  12, 
  54 
  

   Long 
  Island, 
  116 
  

   Long 
  Island 
  province, 
  25, 
  28 
  

   Luzerne 
  river, 
  11 
  1 
  

   Lyons 
  Falls, 
  21 
  

  

  Mammals, 
  age 
  of, 
  77 
  

  

  Manlius 
  limestone, 
  12, 
  54 
  

  

  Maps, 
  construction 
  and 
  uses, 
  118 
  

  

  Marcellus 
  shale, 
  12, 
  56 
  

  

  Maumee, 
  Lake, 
  98 
  

  

  Medina 
  sandstone 
  and 
  conglomerate, 
  

  

  12, 
  51, 
  54 
  

   Mesozoic, 
  61-76; 
  drainage 
  of 
  New 
  

  

  York 
  in, 
  74-76; 
  life 
  of, 
  66-67 
  

   Metamorphic 
  rocks, 
  9 
  

   Michigan, 
  Lake, 
  98 
  

   Miocene, 
  77 
  

  

  Mohawk-Hudson 
  basin, 
  26 
  

   Mohawk 
  river, 
  27, 
  80, 
  86; 
  outlet, 
  101 
  

   Mohawk 
  valley, 
  80; 
  faulted 
  region, 
  

  

  72; 
  glacial 
  history, 
  109 
  

   Mohawk 
  valley 
  province, 
  19-21 
  

   Mohonk 
  lake, 
  104 
  

   Mt 
  Marcy, 
  34; 
  altitude, 
  15 
  

  

  New 
  York 
  City, 
  116 
  

   New 
  York 
  State, 
  recent 
  elevation, 
  

   116 
  

  

  