﻿526 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  it 
  has 
  attained 
  a 
  thickness 
  of 
  fifteen 
  feet, 
  is 
  massively 
  bedded, 
  

   and 
  its 
  color 
  has 
  become 
  white. 
  

  

  South 
  from 
  this 
  region 
  the 
  western 
  portion 
  of 
  this 
  synclinal 
  

   is 
  continued 
  in 
  the 
  Shawangunk 
  grit, 
  and 
  in 
  a 
  local 
  widening 
  

   and 
  deepening 
  of 
  the 
  flexure, 
  a 
  mile 
  and 
  a 
  half 
  south 
  of 
  Rosen- 
  

   dale, 
  there 
  is 
  a 
  small 
  outlier 
  of 
  the 
  cement 
  bed 
  obscurely 
  exposed 
  

   at 
  several 
  points. 
  It 
  crosses 
  the 
  railroad 
  and 
  extends 
  around 
  

   the 
  end 
  of 
  a 
  small 
  local 
  anticlinal 
  which 
  pitches 
  up 
  rapidly 
  to 
  

   the 
  southward. 
  

  

  At 
  Rosendale 
  the 
  western 
  limb 
  of 
  the 
  synclinal 
  is 
  traversed 
  

   by 
  a 
  longitudinal 
  fault 
  which 
  has 
  offset 
  the 
  cement 
  and 
  associ- 
  

   ated 
  beds 
  to 
  a 
  considerable 
  degree. 
  

  

  This 
  fault 
  crosses 
  Rondout 
  creek 
  near 
  the 
  center 
  of 
  the 
  village 
  

   and 
  extends 
  up 
  a 
  depression 
  to 
  the 
  northward, 
  dying 
  out 
  in 
  

   about 
  a 
  mile. 
  Its 
  presence 
  is 
  marked 
  by 
  a 
  low 
  cliff 
  of 
  Pentam- 
  

   erus 
  beds 
  along 
  the 
  canal 
  and 
  the 
  juxtaposition 
  of 
  the 
  upper 
  

   part 
  of 
  the 
  lower 
  Shaly 
  beds 
  and 
  the 
  Pentamerus 
  limestone 
  a 
  short 
  

   distance 
  north. 
  To 
  the 
  south 
  it 
  passes 
  into 
  the 
  Shawangunk 
  grit 
  

   area, 
  where 
  it 
  was 
  traced 
  for 
  some 
  distance. 
  Its 
  maximum 
  dis- 
  

   placement 
  is 
  near 
  Rosendale, 
  where 
  the 
  amount 
  is 
  about 
  200 
  feet. 
  

   Its 
  general 
  relations 
  are 
  shown 
  in 
  section 
  IV, 
  plate 
  7, 
  and 
  in 
  

   figure 
  6. 
  Some 
  details 
  of 
  this 
  overthrust 
  are 
  finely 
  exyjosed 
  

   in 
  an 
  abandoned 
  quarry 
  on 
  the 
  slope 
  just 
  south 
  of 
  the 
  creek, 
  

   opposite 
  Rosendale, 
  and 
  it 
  is 
  on 
  this 
  exposure 
  that 
  the 
  following 
  

   sections 
  are 
  based. 
  

  

  Fig. 
  6.— 
  Cross 
  section 
  just 
  south 
  of 
  Rosendale 
  showing 
  relations 
  of 
  overthrust 
  fault. 
  Looking 
  

   north-northeast. 
  

  

  The 
  wedge 
  of 
  cement 
  has 
  been 
  worked 
  out 
  for 
  a 
  length 
  of 
  200 
  

   feet, 
  and 
  the 
  fault 
  plane 
  is 
  the 
  hanging 
  wall 
  of 
  the 
  quarry. 
  

   Many 
  minor 
  details 
  of 
  the 
  slate 
  wedges 
  and 
  crumplings 
  are 
  not 
  

  

  