﻿54 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  The 
  Glen-Riparius 
  fault. 
  This 
  fault, 
  whose 
  length 
  is 
  some 
  8 
  

   or 
  9 
  miles, 
  is 
  clearly 
  the 
  longest 
  one 
  lying 
  wholly 
  within 
  the 
  quad- 
  

   rangle. 
  It 
  is 
  topographically 
  very 
  plainly 
  marked, 
  a 
  whole 
  line 
  of 
  

   low 
  mountain 
  peaks 
  forming 
  the 
  crest 
  of 
  the 
  scarp. 
  This 
  great 
  

   fault 
  block 
  shows 
  a 
  very 
  distinct 
  downtilt 
  toward 
  the 
  east 
  which 
  

   accounts 
  for 
  the 
  peculiar 
  drainage 
  condition 
  because 
  no 
  considerable 
  

   streams 
  enter 
  the 
  Hudson 
  river 
  .from 
  the 
  east 
  along 
  the 
  line 
  of 
  the 
  

   fault 
  but, 
  instead, 
  the 
  streams 
  all 
  drain 
  from 
  the 
  crest 
  of 
  the 
  scarp 
  

   down 
  the 
  eastward 
  slope 
  and 
  into 
  the 
  Friends 
  and 
  Loon 
  lake 
  

   basins. 
  The 
  Hudson 
  river 
  itself 
  has 
  had 
  its 
  course 
  determined 
  

   along 
  the 
  base 
  of 
  the 
  scarp. 
  A 
  displacement 
  of 
  from 
  300 
  to 
  600 
  

   feet 
  is 
  commonly 
  shown. 
  

  

  Gage-Stockton 
  mountain 
  fault. 
  As 
  shown 
  on 
  the 
  map 
  by 
  the 
  

   heavy 
  broken 
  line, 
  a 
  prominent 
  fault 
  is 
  thought 
  to 
  extend 
  along 
  the 
  

   eastern 
  bases 
  of 
  Mill, 
  Stockton, 
  and 
  Gage 
  mountains 
  and 
  south- 
  

   ward 
  to 
  The 
  Glen. 
  The 
  principal 
  evidences 
  for 
  faulting 
  here 
  are 
  

   the 
  arrangement 
  of 
  the 
  high, 
  steep 
  mountains 
  along 
  a 
  regular 
  line 
  

   and 
  the 
  long, 
  smooth 
  contact 
  between 
  the 
  areas 
  of 
  Grenville 
  and 
  

   mixed 
  gneisses 
  and 
  the 
  igneous 
  rocks. 
  The 
  usual 
  tilted 
  character 
  

   of 
  the 
  fault 
  blocks 
  is 
  here 
  not 
  shown. 
  Shear 
  zones 
  were 
  not 
  noted 
  

   though 
  this 
  is 
  of 
  little 
  significance 
  because 
  exposures 
  on 
  the 
  line 
  of 
  

   the 
  fault 
  are 
  very 
  scarce. 
  The 
  displacement 
  of 
  this 
  fault 
  appears 
  

   to 
  be 
  as 
  much 
  as 
  800 
  or 
  1000 
  feet. 
  

  

  If 
  this 
  fault 
  is 
  actually 
  present, 
  then 
  the 
  large 
  wedge 
  of 
  Grenville 
  

   and 
  mixed 
  gneisses 
  in 
  the 
  valley 
  bottom 
  is 
  of 
  the 
  nature 
  of 
  a 
  

   through 
  fault 
  block. 
  

  

  Oven-Mill 
  mountain 
  faults. 
  These 
  faults 
  are 
  most 
  likely 
  parts 
  

   of 
  the 
  same 
  line 
  of 
  fracture, 
  though 
  the 
  connection 
  has 
  not 
  been 
  

   positively 
  traced. 
  In 
  each 
  case 
  Grenville 
  (chiefly 
  limestone) 
  dips 
  

   eastward 
  and 
  directly 
  against 
  the 
  base 
  of 
  the 
  mountain. 
  The 
  Oven 
  

   mountain 
  fault 
  scarp, 
  which 
  rises 
  nearly 
  900 
  feet 
  and 
  is 
  very 
  steep 
  

   to 
  almost 
  precipitous, 
  is 
  an 
  impressive 
  sight 
  as 
  viewed 
  from 
  the 
  

   west. 
  An 
  eastward 
  downtilt 
  of 
  the 
  block 
  is 
  fairly 
  well 
  shown. 
  The 
  

   Mill 
  mountain 
  scarp 
  is 
  not 
  so 
  steep 
  but 
  rises 
  to 
  a 
  height 
  of 
  over 
  

   700 
  feet. 
  Because 
  of 
  the 
  much 
  weaker 
  Grenville 
  between 
  the 
  two 
  

   mountains, 
  no 
  distinct 
  fault 
  scarp 
  is 
  there 
  present. 
  

  

  North 
  Creek 
  fault 
  and 
  branch. 
  This 
  prominent 
  fault 
  strikes 
  

   north-northeast 
  by 
  south-southwest 
  and 
  passes 
  through 
  the 
  village 
  

   of 
  North 
  Creek. 
  Northward 
  from 
  the 
  village 
  it 
  is 
  very 
  clearly 
  

   traceable 
  as 
  a 
  topographic 
  feature 
  for 
  at 
  least 
  10 
  or 
  12 
  miles 
  and 
  

   well 
  into 
  the 
  Schroon 
  lake 
  quadrangle 
  along 
  the 
  west 
  side 
  of 
  the 
  

  

  