﻿Report 
  of 
  the 
  State 
  Geologist. 
  547 
  

  

  steep 
  cliffs 
  and 
  the 
  width 
  of 
  the 
  valley 
  or 
  cleft 
  in 
  which 
  the 
  

   lake 
  lies. 
  In 
  the 
  following 
  figure 
  there 
  are 
  shown 
  the 
  principal 
  

   structural 
  features 
  at 
  this 
  locality. 
  

  

  Fig. 
  13. 
  Cross-section 
  of 
  the 
  eastern 
  ridges 
  of 
  Shawangunk 
  mountain 
  through 
  Lake 
  

   Minnewaska. 
  Looking 
  north. 
  H., 
  Hudson 
  river 
  shales. 
  S., 
  Shaw 
  an 
  gunk 
  grit. 
  

  

  The 
  cliffs 
  which 
  extend 
  along 
  the 
  east 
  side 
  of 
  the 
  lake 
  are 
  

   very 
  high 
  and 
  precipitous. 
  They 
  are 
  shown 
  in 
  greater 
  part 
  in 
  

   plate 
  18. 
  As 
  at 
  Lake 
  Mohonk 
  the 
  rocks 
  are 
  greatly 
  fissured 
  and 
  

   they 
  are 
  traversed 
  by 
  many 
  deep, 
  wide 
  clefts. 
  The 
  dips 
  are 
  

   gently 
  anticlinal 
  about 
  the 
  lake, 
  which 
  is 
  on 
  the 
  axis 
  of 
  the 
  

   flexure, 
  but 
  they 
  increase 
  in 
  amount 
  to 
  the 
  east 
  and 
  west. 
  

  

  The 
  lake 
  empties 
  to 
  the 
  southward 
  through 
  a 
  wide 
  gap 
  into 
  

   the 
  synclinal 
  valley 
  of 
  the 
  Coxingkill, 
  and 
  it 
  may 
  be 
  regarded 
  as 
  

   the 
  headwaters 
  of 
  this 
  stream. 
  

  

  A 
  mile 
  southeast 
  of 
  the 
  lake 
  the 
  anticlinal 
  in 
  which 
  the 
  lake 
  is 
  

   situated 
  is 
  crossed 
  by 
  the 
  road 
  to 
  Port 
  flixon, 
  and 
  in 
  the 
  vicinity 
  

   of 
  the 
  road 
  the 
  grit 
  has 
  been 
  eroded 
  from 
  the 
  crown 
  of 
  the 
  arch 
  

   for 
  some 
  distance. 
  The 
  road 
  crosses 
  the 
  ridge 
  in 
  a 
  gap 
  on 
  the 
  

   Hudson 
  river 
  shales, 
  and 
  the 
  edges 
  of 
  the 
  grit 
  give 
  rise 
  to 
  high 
  

   cliffs 
  on 
  either 
  side. 
  Down 
  the 
  slope 
  the 
  grit 
  outcrops 
  on 
  the 
  

   flank 
  of 
  the 
  arch, 
  but 
  the 
  slate 
  extends 
  along 
  the 
  slopes 
  of 
  the 
  

   mountain 
  for 
  some 
  distance, 
  especially 
  on 
  the 
  east 
  side. 
  The 
  

   occurrence 
  of 
  the 
  slate 
  in 
  this 
  inlying 
  area 
  is 
  a 
  very 
  striking 
  

   feature, 
  and 
  the 
  reason 
  for 
  the 
  removal 
  of 
  the 
  grit 
  at 
  this 
  locality 
  

   is 
  not 
  clear. 
  

  

  South 
  of 
  Lake 
  Minnewaska 
  the 
  front 
  of 
  the 
  ridge 
  trends 
  to 
  the 
  

   southwest 
  for 
  some 
  distance, 
  and 
  the 
  Coxingkill 
  synclinal 
  and 
  the 
  

   Minnewaska 
  anticline 
  pass 
  out 
  to 
  the 
  south. 
  There 
  is 
  a 
  prominent 
  

   "point" 
  in 
  this 
  vicinity 
  known 
  as 
  Gertrude's 
  nose, 
  which 
  is 
  due 
  

   to 
  a 
  deep 
  incision 
  in 
  the 
  front 
  of 
  the 
  mountain 
  made 
  by 
  a 
  small 
  

   branch 
  of 
  the 
  Wallkill. 
  This 
  stream 
  heads 
  in 
  the 
  plateau 
  south 
  

  

  