﻿562 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  As 
  the 
  stratigraphic 
  relations 
  of 
  the 
  limestones 
  to 
  the 
  adjacent 
  

   slates 
  is 
  not 
  known 
  the 
  amount 
  of 
  the 
  fault 
  could 
  not 
  be 
  deter- 
  

   mined. 
  It 
  crosses 
  the 
  Hudson 
  northeastward, 
  where 
  it 
  has 
  been 
  

   studied 
  by 
  D 
  wight.* 
  

  

  Pleistocene 
  Geology. 
  

  

  The 
  Pleistocene 
  formations 
  consist 
  of 
  glacial 
  drift 
  of 
  various 
  

   kinds, 
  alluvial 
  accumulations 
  and 
  stratified 
  clays 
  and 
  sands. 
  I 
  

   have 
  not 
  made 
  a 
  special 
  examination 
  of 
  these 
  formations 
  and 
  

   have 
  but 
  little 
  to 
  offer 
  regarding 
  them. 
  The 
  region 
  has 
  been 
  

   extensively 
  glaciated, 
  and 
  in 
  some 
  localities 
  the 
  products 
  of 
  

   glaciation 
  are 
  quite 
  conspicuous. 
  These 
  are 
  masses 
  of 
  drift, 
  

   in 
  greater 
  part 
  consisting 
  of 
  thin, 
  irregular 
  sheets 
  extended 
  

   over 
  wide 
  areas, 
  and 
  glacial 
  striae, 
  scoring 
  and 
  polishing 
  pre- 
  

   served 
  on 
  the 
  surface 
  of 
  the 
  harder 
  rocks. 
  The 
  Shawangunk 
  

   mountain 
  presents 
  the 
  clearest 
  evidences 
  of 
  this 
  glaciation, 
  

   which 
  is 
  conspicuous 
  over 
  nearly 
  its 
  entire 
  area. 
  This 
  feature 
  

   has 
  been 
  referred 
  to 
  by 
  a 
  number 
  of 
  observers, 
  and 
  Julien 
  f 
  has 
  

   recorded 
  the 
  direction 
  and 
  nature 
  of 
  the 
  striation 
  at 
  many 
  points 
  

   as 
  follows 
  : 
  

  

  " 
  In 
  the 
  Sam's 
  point 
  region 
  they 
  are 
  northeast 
  and 
  southwest, 
  

   varying 
  a 
  few 
  degrees 
  on 
  either 
  side. 
  Those 
  trending 
  south 
  

   twenty-nine 
  degrees 
  west 
  are 
  most 
  abundant, 
  and 
  there 
  were 
  

   fifteen 
  to 
  a 
  foot, 
  mostly 
  about 
  one-sixteenth 
  of 
  an 
  inch 
  deep. 
  A 
  

   few 
  one-quarter 
  of 
  an 
  inch 
  in 
  depth 
  trended 
  south 
  seventy-five 
  

   degrees 
  west 
  and 
  south 
  eighty-six 
  degrees 
  west. 
  In 
  following 
  a 
  

   long 
  scratch 
  southward 
  there 
  seemed 
  to 
  be 
  a 
  tendency 
  to 
  curve 
  

   more 
  and 
  more 
  toward 
  a 
  point 
  nearer 
  the 
  west. 
  In 
  the 
  vicinity 
  

   of 
  Lake 
  Mohonk 
  south 
  ten 
  degrees 
  west 
  was 
  the 
  direction 
  

   observed 
  at 
  many 
  points 
  on 
  the 
  northwestern 
  side 
  of 
  the 
  moun 
  

   tain, 
  and 
  south 
  forty 
  degrees 
  east 
  on 
  the 
  southeastern 
  side, 
  and 
  

   south 
  eighteen 
  degrees 
  east 
  on 
  " 
  Sky 
  Top 
  " 
  at 
  the 
  summit 
  of 
  Paltz 
  

   point; 
  on 
  the 
  road 
  to 
  Alligerville 
  south 
  forty 
  degrees 
  east 
  on 
  

   the 
  northwestern 
  slope 
  of 
  the 
  mountain. 
  At 
  Lake 
  Minnewaska 
  

   the 
  direction 
  is 
  given 
  as 
  south 
  ten 
  degrees 
  west." 
  

  

  It 
  is 
  suggested 
  by 
  Julien 
  that 
  the 
  southeasterly 
  direction 
  on 
  

   " 
  Sky 
  Top 
  " 
  may 
  record 
  the 
  direction 
  of 
  the 
  older 
  and 
  thicker 
  

   glacial 
  stream, 
  while 
  the 
  others 
  are 
  due 
  to 
  local 
  variations 
  in 
  

  

  * 
  Am. 
  Jour. 
  Science, 
  III, 
  vol. 
  81, 
  pp. 
  126-188; 
  one 
  plate, 
  1886. 
  

   tNew 
  York 
  Acad. 
  Science, 
  Trans., 
  vol. 
  8, 
  pp. 
  28-29. 
  

  

  