﻿524 
  Forty-seventh 
  Repoet 
  on 
  tee 
  State 
  Museum. 
  

  

  along 
  its 
  axis. 
  The 
  beds 
  in 
  the 
  synclinal 
  are 
  cut 
  off 
  to 
  the 
  eastward 
  

   by 
  the 
  fault 
  described 
  above. 
  This 
  fault 
  gradually 
  decreases 
  in 
  

   throw 
  southward, 
  and 
  passing 
  out 
  of 
  the 
  Esopus 
  shales 
  cuts 
  off 
  the 
  

   Oriskany 
  sandstone 
  and 
  Helderberg 
  limestones 
  in 
  succession 
  along 
  

   the 
  eastern 
  limb 
  of 
  the 
  synclinal, 
  finally 
  dying 
  out 
  at 
  a 
  point 
  due 
  

   west 
  of 
  Creek 
  Locks. 
  Near 
  its 
  termination 
  the 
  Clinton 
  quartzite 
  

   appears 
  to 
  come 
  in 
  on 
  the 
  uplifted 
  block, 
  and 
  the 
  dislocation 
  is 
  

   between 
  this 
  member 
  and 
  the 
  cement 
  series 
  which 
  pitches 
  up 
  

   from 
  below 
  the 
  Tentaculite 
  beds 
  west 
  of 
  the 
  fault. 
  The 
  fault 
  is 
  

   covered 
  by 
  sand 
  for 
  a 
  considerable 
  distance 
  in 
  this 
  vicinity, 
  but 
  

   there 
  is 
  an 
  exposure, 
  apparently, 
  of 
  its 
  termination, 
  in 
  an 
  old 
  

   quarry 
  in 
  which 
  the 
  cement 
  beds 
  are 
  seen 
  slipped 
  against 
  a 
  

   slickensided, 
  vertical 
  face 
  of 
  the 
  quartzite. 
  Near 
  the 
  surface 
  the 
  

   bedding 
  of 
  both 
  is 
  conformable, 
  but 
  below, 
  the 
  cement 
  series 
  dips 
  

   steeply 
  westward. 
  

  

  As 
  the 
  cement 
  series 
  comes 
  to 
  the 
  surface 
  it 
  is 
  seen 
  to 
  contain 
  

   thick 
  cement 
  beds, 
  and 
  these 
  have 
  been 
  worked 
  all 
  alone; 
  the 
  

   eastern 
  side 
  of 
  the 
  ridge 
  to 
  which 
  the 
  synclinal 
  gives 
  rise. 
  The 
  

   general 
  structure 
  of 
  the 
  synclinal 
  in 
  the 
  vicinity 
  of 
  these 
  workings 
  

   is 
  shown 
  in 
  the 
  second 
  and 
  third 
  sections 
  on 
  plate 
  7. 
  The 
  dips 
  

   are 
  from 
  fifty 
  degrees 
  to 
  sixty 
  degrees 
  along 
  the 
  eastern 
  crest 
  of 
  

   the 
  ridge, 
  but 
  they 
  decrease 
  westward 
  and 
  become 
  flat 
  for 
  some 
  

   distance, 
  then 
  very 
  gently 
  anticlinal. 
  The 
  road 
  along 
  the 
  top 
  of 
  

   the 
  ridge 
  passes 
  along 
  flat 
  beds 
  of 
  Pentamerus 
  limestones, 
  which 
  

   are 
  spread 
  out 
  over 
  a 
  considerable 
  width 
  by 
  this 
  structure. 
  I 
  a 
  

   the 
  center 
  of 
  the 
  ridge 
  the 
  dip 
  increases, 
  and 
  the 
  synclinal 
  holds 
  

   a 
  wide 
  area 
  of 
  lower 
  Shaly 
  limestone 
  which 
  extends 
  nearly 
  to 
  

   Kosendale. 
  At 
  their 
  southern 
  terminus 
  they 
  finely 
  exhibit 
  the 
  

   synclinal 
  structure 
  of 
  the 
  beds. 
  The 
  principal 
  cement 
  bed 
  has 
  a 
  

   thickness 
  averaging 
  about 
  twenty 
  feet 
  along 
  the 
  eastern 
  slopes 
  of 
  

   the 
  ridge, 
  and 
  it 
  has 
  been 
  mined 
  very 
  extensively. 
  It 
  is 
  massively 
  

   bedded, 
  and 
  uniform 
  in 
  composition, 
  with 
  only 
  occasional 
  thin 
  

   cherty 
  streaks. 
  It 
  lies 
  on 
  the 
  Clinton 
  quartzite, 
  and 
  the 
  relations 
  

   of 
  this 
  formation 
  and 
  the 
  underlying 
  red 
  shales 
  are 
  very 
  clearly 
  

   exposed 
  in 
  the 
  adit 
  to 
  the 
  New 
  York 
  Cement 
  Company's 
  quarry. 
  

   Here 
  the 
  quartzite 
  is 
  twenty-two 
  feet 
  thick, 
  and 
  it 
  consists 
  of 
  

   regular 
  beds 
  three 
  to 
  twelve 
  inches 
  in 
  thickness, 
  in 
  greater 
  part 
  

   welded 
  together. 
  Their 
  color 
  is 
  light-gray 
  with 
  buff- 
  brown 
  

   streaks, 
  and 
  many 
  of 
  the 
  beds 
  have 
  a 
  characteristic 
  minute 
  cross- 
  

  

  