﻿52 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Chase 
  mountain 
  fault. 
  This 
  fault 
  strikes 
  nearly 
  north 
  and 
  south 
  

   and 
  the 
  chief 
  evidences 
  for 
  its 
  existence 
  are 
  the 
  very 
  prominent 
  

   scarp 
  in 
  the 
  homogeneous 
  granite 
  porphyry 
  and 
  some 
  suggestions 
  

   of 
  shearing. 
  The 
  usual 
  tilted 
  character 
  of 
  the 
  blocks 
  is 
  not 
  here 
  

   shown. 
  This 
  fault 
  probably 
  continues 
  southward 
  to 
  join 
  the 
  Mil- 
  

   lington 
  brook 
  fault 
  as 
  indicated 
  on 
  the 
  map. 
  

  

  Tripp 
  mountain 
  faults. 
  A 
  fault 
  whose 
  trend 
  is 
  almost 
  exactly 
  

   north 
  and 
  south 
  lies 
  along 
  the 
  western 
  base 
  of 
  Tripp 
  mountain 
  as 
  

   shown 
  on 
  the 
  map. 
  The 
  evidence 
  for 
  this 
  fault 
  is 
  largely 
  topo- 
  

   graphic, 
  such 
  as 
  the 
  presence 
  of 
  a 
  very 
  distinct 
  scarp 
  along 
  a 
  

   straight 
  line 
  for 
  several 
  miles 
  in 
  homogeneous 
  igneous 
  rock, 
  and 
  

   also 
  the 
  rather 
  distinct 
  downslope 
  toward 
  the 
  east 
  from 
  the 
  scarp. 
  

   Near 
  the 
  south 
  end 
  of 
  the 
  fault 
  and 
  on 
  the 
  west 
  side 
  of 
  the 
  hill 
  

   (122 
  1 
  feet) 
  some 
  sheared 
  rock 
  was 
  noted, 
  but 
  for 
  most 
  part 
  the 
  

   line 
  of 
  the 
  fault 
  is 
  covered 
  with 
  rock 
  debris. 
  A 
  maximum 
  dis- 
  

   placement 
  of 
  no 
  less 
  than 
  300 
  to 
  400 
  feet 
  seems 
  to 
  be 
  shown. 
  

  

  The 
  southeastern 
  face 
  of 
  Tripp 
  mountain 
  is 
  a 
  steep 
  scarp 
  which 
  

   has 
  almost 
  certainly 
  been 
  produced 
  by 
  faulting 
  because 
  of 
  its 
  pres- 
  

   ence 
  in 
  homogeneous 
  granite 
  porphyry 
  and 
  away 
  from 
  any 
  con- 
  

   siderable 
  stream. 
  A 
  throw 
  of 
  several 
  hundred 
  feet 
  is 
  represented. 
  

  

  Tripp 
  pond 
  fault. 
  This 
  fault 
  strikes 
  northwest-southeast 
  and 
  

   passes 
  along 
  the 
  north 
  side 
  of 
  Tripp 
  pond 
  and 
  along 
  the 
  bases 
  of 
  

   the 
  mountains 
  whose 
  elevations 
  are 
  respectively 
  1662 
  and 
  1389 
  

   feet. 
  The 
  very 
  steep 
  scarp 
  rising 
  to 
  a 
  height 
  of 
  700 
  feet 
  and 
  form- 
  

   ing 
  the 
  southwestern 
  face 
  of 
  the 
  mountain 
  (1662 
  feet) 
  just 
  north 
  

   of 
  Tripp 
  pond 
  is 
  almost 
  certainly 
  a 
  fault 
  scarp. 
  At 
  the 
  opposite 
  

   end 
  of 
  the 
  fault 
  the 
  scarp 
  is 
  distinctly 
  traceable 
  along 
  the 
  south- 
  

   western 
  face 
  of 
  the 
  low 
  mountain 
  (1389 
  feet) 
  and 
  the 
  little 
  hill 
  

   just 
  southwest 
  of 
  Sullivan 
  pond. 
  The 
  scarp 
  here 
  strikes 
  at 
  a 
  high 
  

   angle 
  across 
  the 
  foliation 
  and 
  in 
  homogeneous 
  rock. 
  

  

  Bull 
  Rock 
  mountain 
  faults. 
  These 
  two 
  faults 
  form 
  the 
  western 
  

   boundary 
  of 
  the 
  mass 
  of 
  syenite 
  which 
  lies 
  along 
  the 
  east-central 
  

   margin 
  of 
  the 
  map. 
  The 
  shorter 
  one 
  strikes 
  northwest-southeast 
  

   and 
  lies 
  along 
  the 
  western 
  border 
  of 
  the 
  Bull 
  Rock 
  mountain 
  mass, 
  

   and 
  the 
  smaller 
  mountain 
  (1560 
  feet) 
  just 
  to 
  the 
  northwest. 
  Gren- 
  

   ville, 
  chiefly 
  quartzite, 
  dips 
  downward 
  sharply 
  against 
  the 
  fault. 
  

  

  The 
  longer 
  fault 
  follows 
  a 
  perfectly 
  straight 
  line 
  of 
  hills 
  or 
  low 
  

   mountains 
  whose 
  elevations 
  are 
  respectively 
  1560, 
  15 
  12, 
  1200, 
  and 
  

   1 
  140 
  feet, 
  the 
  throw 
  of 
  the 
  fault 
  apparently 
  gradually 
  diminishing 
  

   toward 
  the 
  north. 
  The 
  Grenville 
  in 
  the 
  valley 
  immediately 
  west 
  

   of 
  the 
  fault 
  consists 
  of 
  various 
  gneisses 
  with 
  varying 
  dips 
  and 
  

  

  