﻿254 
  

  

  J. 
  Bar 
  veil 
  — 
  The 
  Piedmont 
  Terraces 
  

  

  The 
  transition 
  slope 
  from 
  the 
  lower 
  to 
  the 
  higher 
  level 
  

   may 
  be 
  recognized, 
  about 
  iy 
  2 
  miles 
  to 
  the 
  left 
  of 
  Mt. 
  

   Tom, 
  but 
  is 
  less 
  evident 
  than 
  on 
  the 
  preceding 
  profiles 
  

   owing 
  to 
  the 
  greater 
  complexity 
  of 
  the 
  geologic 
  forma- 
  

   tions 
  in 
  this 
  area. 
  Mt. 
  Tom, 
  formed 
  of 
  resistant 
  amphi- 
  

   bolite, 
  was 
  interpreted 
  by 
  Professor 
  Barrell 
  as 
  a 
  rock 
  

   stack 
  now 
  so 
  eroded, 
  however, 
  that 
  no 
  definite 
  evidence 
  

   of 
  wave 
  work 
  on 
  its 
  slopes 
  can 
  be 
  detected. 
  

  

  Figure 
  5 
  shows 
  the 
  adjacent 
  parts 
  of 
  the 
  Goshen 
  

   (1,340-1,380 
  feet) 
  and 
  Cornwall 
  (1,640-1,680 
  feet) 
  ter- 
  

   races 
  projected 
  from 
  an 
  area 
  6y 
  2 
  by 
  9% 
  miles 
  in 
  extent 
  

   on 
  the 
  Cornwall 
  and 
  Winsted 
  quadrangles. 
  The 
  Goshen 
  

   terrace 
  is 
  well 
  shown 
  and 
  also 
  the 
  transition 
  slope, 
  i. 
  e., 
  

  

  Fig. 
  5. 
  

  

  

  

  

  

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  v 
  

  

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  ? 
  

  

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  Miles 
  V/77/ 
  

  

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  700 
  

   600 
  

  

  600 
  

  

  

  

  

  

  

  

  Fig. 
  5. 
  — 
  Projected 
  profile 
  of 
  parts 
  of 
  the 
  Cornwall 
  and 
  Winsted 
  quad- 
  

   rangles 
  showing 
  the 
  Goshen 
  (1,340-1,380 
  feet) 
  and 
  Cornwall 
  (1,640- 
  

   1,680) 
  terraces. 
  View 
  looking 
  N 
  55° 
  E. 
  (3) 
  Berkshire 
  schist, 
  (4) 
  Becket 
  

   gneiss, 
  and 
  (14) 
  Thomastown 
  granite. 
  

  

  the 
  Goshen 
  "shore-line"; 
  on 
  the 
  other 
  hand, 
  the 
  rem- 
  

   nants 
  of 
  the 
  Cornwall 
  terrace 
  show 
  a 
  much 
  more 
  irreg- 
  

   ular 
  sky-line. 
  The 
  numerals 
  correspond 
  to 
  those 
  of 
  the 
  

   geologic 
  formations 
  as 
  given 
  on 
  the 
  preliminary 
  geologic 
  

   map 
  of 
  Connecticut, 
  13 
  It 
  is 
  seen 
  that 
  the 
  difference 
  in 
  

   elevation 
  of 
  the 
  two 
  terraces 
  does 
  not 
  depend 
  on 
  differ- 
  

   ences 
  in 
  rock 
  formations 
  and 
  moreover 
  the 
  Goshen 
  plain, 
  

   referred 
  to 
  in 
  the 
  next 
  paragraph, 
  is 
  developed 
  on 
  gran- 
  

   ite 
  and 
  schist. 
  The 
  general 
  lack 
  of 
  dependence 
  of 
  the 
  

  

  13 
  Conn. 
  Geol. 
  and 
  Nat. 
  Hist. 
  Survey, 
  Bull. 
  No. 
  7, 
  1906. 
  

  

  