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  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum, 
  

  

  of 
  the 
  formation 
  up 
  to 
  the 
  Helderberg 
  beds 
  in 
  the 
  slope 
  south- 
  

   ward, 
  which 
  gives 
  a 
  total 
  of 
  the 
  thickness 
  of 
  3480 
  feet. 
  

  

  Structure. 
  

  

  The 
  general 
  structure 
  of 
  Albany 
  county 
  is 
  represented 
  in 
  figure 
  

   1. 
  In 
  the 
  following 
  statements 
  an 
  account 
  will 
  be 
  given 
  of 
  the 
  

   exceptional 
  features 
  of 
  the 
  structure. 
  

  

  The 
  monoclinal 
  region 
  is 
  relatively 
  uniform 
  in 
  relations. 
  There 
  

   are 
  many 
  slight 
  local 
  variations 
  in 
  the 
  amount 
  and 
  direction 
  of 
  

   dip, 
  but 
  these 
  are 
  more 
  apparent 
  in 
  their 
  general 
  effect 
  on 
  the 
  

   distribution 
  of 
  formations 
  than 
  in 
  local' 
  outcrops. 
  The 
  two 
  

   sections 
  in 
  the 
  following 
  figure 
  represent 
  the 
  principal 
  features 
  

   in 
  the 
  vicinity 
  of 
  the 
  Helderberg 
  escarpment 
  to 
  the 
  northwest- 
  

   ward. 
  

  

  