﻿Berkshire 
  Schist 
  and 
  Stockbridge 
  Limestone. 
  371 
  

  

  nance 
  of 
  dolomitic 
  sedimentation 
  in 
  places 
  to 
  the 
  end 
  of 
  

   Stockbridge 
  limestone 
  time 
  or 
  else 
  to 
  an 
  unconformity 
  

   between 
  the 
  limestone 
  and 
  schist 
  formations. 
  Should 
  the 
  

   latter 
  view 
  be 
  found 
  correct 
  it 
  would 
  corroborate 
  the 
  evi- 
  

   dence 
  from 
  the 
  pebbles. 
  

  

  Conclusions. 
  — 
  The 
  calcite 
  marble 
  pebbles 
  within 
  the 
  

   Berkshire 
  schist 
  indicate 
  that 
  portions 
  of 
  the 
  Stockbridge 
  

   limestone 
  in 
  western 
  Massachusetts 
  were 
  within 
  wave 
  

   action 
  when 
  the 
  streams 
  on 
  the 
  landmass 
  to 
  the 
  east 
  were 
  

   carrying 
  argillaceous 
  material 
  into 
  the 
  great 
  American 
  

   mediterranean 
  sea 
  of 
  Ordovician 
  time. 
  The 
  very 
  mica- 
  

   ceous 
  character 
  of 
  the 
  marble 
  of 
  the 
  Stockbridge 
  lime- 
  

   stone 
  some 
  distance 
  below 
  its 
  contact 
  with 
  the 
  schist 
  

   shows 
  that 
  long 
  before 
  the 
  arrest 
  of 
  calcareous 
  sedimen- 
  

   tation 
  the 
  streams 
  had 
  begun 
  to 
  discharge 
  argillaceous 
  

   material. 
  

  

  Springfield, 
  Mass., 
  March 
  20, 
  1920. 
  

  

  