﻿552 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  and 
  sand 
  in 
  the 
  bottom 
  of 
  the 
  glacier 
  and 
  these 
  features 
  are 
  con- 
  

   spicuous 
  all 
  over 
  the 
  mountain. 
  Some 
  further 
  account 
  of 
  them 
  

   will 
  be 
  found 
  on 
  a 
  subsequent 
  page. 
  To 
  the 
  glaciation, 
  too, 
  is 
  

   probably 
  due 
  the 
  abruptness 
  of 
  Paltz 
  point, 
  the 
  steplike 
  structure 
  

   over 
  the 
  surface 
  of 
  the 
  mountain 
  and 
  other 
  features 
  of 
  that 
  sort. 
  

   The 
  sheet 
  of 
  grit 
  originally 
  extended 
  far 
  to 
  the 
  eastward, 
  but 
  by 
  

   long-continued 
  undermining 
  of 
  the 
  soft 
  underlying 
  shales 
  its 
  front 
  

   has 
  gradually 
  receded 
  to 
  its 
  present 
  position. 
  This 
  recession 
  is 
  

   still 
  actively 
  in 
  progress, 
  and 
  every 
  year 
  there 
  fall 
  great 
  masses 
  

   from 
  the 
  front 
  of 
  the 
  mountain. 
  One 
  of 
  the 
  regions 
  of 
  weakness 
  

   is 
  Paltz 
  point, 
  for 
  the 
  shales 
  at 
  its 
  base 
  are 
  exposed 
  to 
  erosion 
  on 
  

   several 
  sides 
  and 
  fragments 
  of 
  the 
  grit 
  will 
  fall 
  off 
  as 
  the 
  under- 
  

   mining 
  progresses 
  until 
  finally 
  the 
  mass 
  will 
  disappear. 
  

   Probably 
  before 
  it 
  is 
  gone 
  the 
  streams 
  heading 
  near 
  its 
  southern 
  

   end 
  will 
  cut 
  back 
  through 
  the 
  slates 
  at 
  the 
  head 
  of 
  Lake 
  Mohonk 
  

   and 
  this 
  beautiful 
  body 
  of 
  water 
  will 
  be 
  drained 
  off. 
  Of 
  course 
  

   this 
  is 
  all 
  very 
  remote 
  as 
  human 
  history 
  goes, 
  and 
  artificial 
  

   means 
  will 
  stay 
  its 
  progress 
  in 
  some 
  measure 
  ; 
  but 
  it 
  will 
  all 
  be 
  

   accomplished 
  in 
  the 
  near 
  future, 
  geologically 
  speaking. 
  Lakes 
  

   Minnewaska 
  and 
  Awosting 
  lie 
  so 
  far 
  back 
  from 
  the 
  front 
  of 
  the 
  

   mountain 
  that 
  they 
  will 
  survive 
  Lake 
  Mohonk 
  a 
  long 
  time. 
  

  

  The 
  Pondout 
  Talley 
  from 
  above 
  High 
  Falls 
  to 
  Ellenville. 
  

  

  The 
  most 
  prominent 
  features 
  in 
  this 
  valley 
  are 
  wide 
  areas 
  

   of 
  superficial 
  formations 
  which 
  cover 
  the 
  underlying 
  rocks. 
  

   These 
  rocks 
  comprise 
  the 
  several 
  members 
  from 
  Onondaga 
  lime- 
  

   stone 
  to 
  Clinton 
  shales, 
  but 
  owing 
  to 
  the 
  drift 
  covering 
  they 
  are 
  

   but 
  rarely 
  exposed. 
  Their 
  distribution 
  as 
  shown 
  on 
  the 
  geologic 
  

   map 
  is 
  in 
  great 
  part 
  based 
  on 
  widely 
  separated 
  exposures 
  and 
  

   there 
  are 
  areas 
  of 
  considerable 
  size 
  for 
  which 
  there 
  is 
  no 
  definite 
  

   information 
  as 
  to 
  the 
  distribution 
  of 
  all 
  the 
  beds. 
  The 
  structure 
  

   of 
  the 
  region 
  is 
  a 
  monocline 
  dipping 
  to 
  the 
  northwe^ 
  and 
  west. 
  

   The 
  strikes 
  are 
  northeast 
  to 
  the 
  vicinity 
  of 
  Port 
  Jackson, 
  east- 
  

   northeast 
  to 
  Port 
  Hixon, 
  and 
  north-northeast 
  to 
  Ellenville 
  and 
  

   beyond. 
  The 
  dips 
  are 
  very 
  gentle 
  north 
  of 
  Port 
  Jackson, 
  but 
  

   they 
  gradually 
  increase 
  in 
  amount 
  to 
  the 
  southward. 
  At 
  

   Wa\Yarsing, 
  the 
  maximum 
  dips 
  average 
  thirty-five 
  degrees; 
  at 
  

   Napanoch 
  forty-five 
  degrees; 
  at 
  Ellenville 
  forty-five 
  degrees; 
  

   and 
  they 
  continue 
  at 
  this 
  altitude 
  beyond 
  Homowack. 
  The 
  

  

  