﻿INDEX 
  TO 
  GEOLOGY 
  OF 
  THOUSAND 
  ISLANDS 
  REGION 
  

  

  191 
  

  

  Great 
  Bend, 
  143. 
  

  

  Grenville 
  limestones, 
  28, 
  56, 
  ^'j, 
  132; 
  

  

  resting 
  on 
  an 
  ancient 
  lava 
  flow, 
  25 
  ; 
  

  

  Potsdam 
  contact 
  on, 
  58; 
  use 
  for 
  

  

  road 
  metal, 
  173. 
  

   Grenville 
  quartzites, 
  12, 
  31. 
  

   Grenville 
  rocks, 
  8, 
  24, 
  26-36, 
  45 
  ; 
  of 
  

  

  Keewatin 
  age, 
  25 
  ; 
  foliation 
  in, 
  

  

  loo-i 
  ; 
  folds, 
  108-9. 
  

   Grenville 
  schists, 
  12, 
  34-36, 
  47, 
  172; 
  

  

  Potsdam 
  contact 
  on, 
  58. 
  

   Grindstone 
  island, 
  granite, 
  11, 
  41, 
  43, 
  

  

  50, 
  174; 
  conglomerates, 
  15; 
  quartz- 
  

  

  ite, 
  26, 
  31, 
  112; 
  dikes, 
  44; 
  Potsdam 
  

  

  sandstone, 
  62; 
  boulder 
  kames, 
  153. 
  

   Grindstone 
  quadrangle, 
  5, 
  6. 
  

   Guffin 
  ba}^, 
  89, 
  115. 
  

  

  Hall, 
  cited, 
  79. 
  

   Hammond, 
  174. 
  

   Helicotoma, 
  72. 
  

   Hematite, 
  49, 
  50, 
  172, 
  181. 
  

   Hillebrand, 
  Dr 
  W. 
  F., 
  quoted, 
  178- 
  

  

  79, 
  180. 
  

   Hinds, 
  F. 
  A., 
  cited, 
  143. 
  

   Hormoceras 
  tenuifilum, 
  84, 
  87, 
  90. 
  

   Hornblende, 
  2>2>, 
  34, 
  35, 
  38, 
  39, 
  40, 
  4i. 
  

  

  44, 
  51, 
  52, 
  53, 
  119, 
  181, 
  183, 
  184. 
  

   Horse 
  creek, 
  81. 
  

   Howe 
  Island, 
  67. 
  

   Hoyt 
  limestone, 
  97. 
  

   Hyde 
  creek-Perch 
  river 
  valley, 
  127. 
  

   Hyde 
  lake, 
  127, 
  132. 
  

   Hypersthene, 
  44. 
  

  

  Igneous 
  rocks, 
  9-13, 
  24, 
  36-38; 
  later 
  

  

  foliation 
  of, 
  102-3. 
  

   Illaenus 
  americanus, 
  90, 
  ^' 
  

  

  Tlmenite, 
  181. 
  

  

  Indian 
  river, 
  7, 
  26, 
  56, 
  127, 
  128. 
  

   Inliers, 
  114. 
  

  

  Iron 
  ore, 
  35. 
  See 
  also 
  Hematite. 
  

   Iroquois, 
  Lake, 
  137-38. 
  

   Iroquois 
  plane, 
  altitude, 
  139. 
  

   Isle 
  La 
  Motte 
  marble, 
  79. 
  

   Isochilina, 
  72. 
  

   Isotelus 
  platycephalus, 
  90. 
  

  

  Joints, 
  103-8. 
  

  

  Kames, 
  153, 
  154-55- 
  

  

  Keewatin 
  formation, 
  25. 
  

  

  Keuka 
  valley, 
  166. 
  

  

  Kingston, 
  6, 
  67, 
  "// 
  ; 
  granite, 
  41. 
  

  

  Klock's 
  quarry, 
  85. 
  

  

  Knight, 
  cited, 
  25. 
  

  

  Labradorite, 
  44, 
  49. 
  

  

  Lafargeville, 
  151, 
  i53, 
  155- 
  

  

  Lake 
  basins, 
  148-50. 
  

  

  Lake 
  Iroquois, 
  137-38. 
  

  

  Lakes, 
  131-33. 
  

  

  Laurentian 
  granite, 
  36-38; 
  quarries, 
  

  

  174. 
  

   Laurentian 
  granite 
  gneiss, 
  10, 
  12, 
  51 
  ; 
  

  

  use 
  for 
  road 
  metal, 
  173; 
  analyses, 
  

  

  176, 
  185. 
  

   Leperditia, 
  72. 
  

  

  fabulites, 
  83, 
  90. 
  

   Leray 
  limestone, 
  18, 
  79, 
  80, 
  82, 
  84-90, 
  

  

  95, 
  96, 
  97, 
  98, 
  114, 
  115, 
  130, 
  133. 
  

  

  134, 
  135, 
  136. 
  

   Leray 
  sville 
  moraine, 
  160. 
  

   Limerick, 
  89, 
  134, 
  135. 
  

   Limestone 
  flutings, 
  164. 
  

   Limestone 
  ribbing, 
  167-69. 
  

   Limestones, 
  28-31, 
  55; 
  quarries, 
  175. 
  

   Lingulepis 
  acuminata, 
  63, 
  65, 
  66. 
  

   Little 
  Falls 
  dolomite, 
  65, 
  66, 
  97. 
  

   Lituites 
  undatus, 
  84, 
  88. 
  

   Long 
  Lake 
  gneiss, 
  38. 
  

   Loon 
  Lake 
  syenite, 
  analysis, 
  182. 
  

   Lophospira, 
  72. 
  

  

  perangulata, 
  72. 
  

   Lorraine 
  shale, 
  19, 
  54, 
  123, 
  124. 
  

   Lowville, 
  77. 
  

   Lowville 
  limestones, 
  6, 
  18-20, 
  54, 
  79, 
  

  

  80-84, 
  85, 
  89, 
  95, 
  96, 
  97, 
  114, 
  115, 
  

  

  130, 
  132, 
  133, 
  134, 
  136; 
  fold, 
  115, 
  

  

  116; 
  quarries, 
  173, 
  174, 
  175. 
  

  

  Magnetite, 
  33, 
  36, 
  38, 
  40, 
  44, 
  49, 
  64, 
  

  

  177, 
  178, 
  183. 
  

   Martinsburg, 
  70, 
  77. 
  

   Mather, 
  cited, 
  79. 
  

   Medina 
  sandstone, 
  19. 
  

   Medina 
  shale, 
  123. 
  

  

  Mica, 
  29, 
  32, 
  36, 
  40, 
  50, 
  52, 
  64, 
  119. 
  

   Microcline, 
  36, 
  40, 
  41, 
  49, 
  181, 
  183, 
  

   184. 
  

  

  