﻿398 
  T. 
  M. 
  Dale 
  — 
  Ordovician 
  Outlier 
  at 
  Hyde 
  Manor. 
  

  

  In 
  view 
  of 
  the 
  fact 
  that 
  the 
  schist 
  dips 
  under 
  the 
  Ordovician 
  

   on 
  the 
  west 
  side 
  of 
  the 
  outlier 
  at 
  the 
  outcrop 
  next 
  to 
  the 
  north- 
  

   ern 
  elm, 
  and 
  overlies 
  it 
  on 
  the 
  east 
  side 
  at 
  excavation 
  (1), 
  and 
  

   again 
  underlies 
  it 
  in 
  the 
  western 
  half 
  of 
  the 
  outlier, 
  11 
  ft. 
  6 
  in. 
  

   below 
  the 
  surface, 
  as 
  determined 
  by 
  the 
  drilling 
  of 
  1911, 
  and, 
  

   finally, 
  also 
  underlies 
  the 
  Ordovician 
  in 
  the 
  eastern 
  half, 
  20 
  ft. 
  

   vertically 
  below 
  the 
  surface 
  at 
  the 
  eastern 
  edge, 
  as 
  determined 
  

   by 
  the 
  drilling 
  of 
  1913, 
  the 
  synclinal 
  character 
  of 
  the 
  outlier, 
  as 
  

   shown 
  in 
  the 
  former 
  article, 
  is 
  still 
  more 
  completely 
  demonstrated. 
  

   As 
  the 
  schist 
  overlies 
  the 
  limestone 
  on 
  the 
  east 
  side 
  at 
  excav. 
  

   (1) 
  with 
  an 
  eastward 
  dip 
  of 
  35 
  -45°, 
  the 
  presence 
  of 
  schist 
  

   below 
  the 
  limestone 
  lower 
  down 
  on 
  the 
  east 
  side, 
  as 
  shown 
  by 
  

   the 
  core 
  drilling 
  of 
  1913, 
  is 
  just 
  what 
  would 
  not 
  be 
  expected 
  

   under 
  the 
  hypothesis 
  of 
  an 
  overturned 
  anticlinal 
  structure. 
  

   Only 
  a 
  very 
  arbitrarily 
  distorted 
  diagram, 
  contrary 
  to 
  the 
  entire 
  

   habit 
  of 
  the 
  rocks 
  of 
  the 
  Taconic 
  region, 
  could 
  make 
  the 
  outlier 
  

   into 
  an 
  anticline. 
  But 
  the 
  syncline 
  proves 
  to 
  be 
  much 
  more 
  

   elongated 
  along 
  its 
  axial 
  plane 
  than 
  shown 
  in 
  ■&.&. 
  2 
  (H) 
  of 
  the 
  

   first 
  paper, 
  its 
  deepest 
  part 
  on 
  the 
  line 
  of 
  section 
  being 
  24 
  feet 
  

   vertically 
  below 
  the 
  highest 
  part 
  of 
  the 
  outlier. 
  

  

  The 
  unconformity 
  between 
  the 
  Cambrian 
  and 
  Ordovician 
  

   beds, 
  already 
  shown 
  by 
  specimens 
  obtained 
  at 
  the 
  contact 
  at 
  

   excavation 
  (2),* 
  is 
  again 
  shown 
  in 
  the 
  cores 
  by 
  the 
  difference 
  

   in 
  bedding 
  dip. 
  

  

  The 
  interpretation 
  of 
  the 
  structure 
  as 
  consisting 
  of 
  Cambrian 
  

   schist 
  thrust 
  over 
  Ordovician 
  limestone 
  and 
  both 
  folded 
  into 
  

   an 
  overturned 
  anticline, 
  with 
  the 
  subsequent 
  erosion 
  of 
  the 
  

   Cambrian 
  to 
  form 
  a 
  " 
  Fenster," 
  is 
  shut 
  out 
  by 
  ail 
  the 
  laws 
  of 
  

   probability 
  applied 
  to 
  the 
  conjoint 
  evidence 
  of 
  the 
  outcrops, 
  

   the 
  excavations, 
  the 
  cores, 
  thin 
  sections, 
  and 
  the 
  habit 
  of 
  the 
  

   region. 
  

  

  The 
  correctness 
  of 
  the 
  conclusions 
  of 
  the 
  first 
  paper 
  as 
  to 
  

   the 
  general 
  significance 
  of 
  the 
  outlier 
  f 
  is 
  thus 
  made 
  still 
  more 
  

   probable. 
  

  

  The 
  interfolding 
  of 
  the 
  limestone 
  at 
  the 
  northeast 
  corner, 
  

   excavation 
  (6), 
  and 
  the 
  pitch 
  of 
  the 
  limestone 
  under 
  the 
  schist 
  

   at 
  excavation 
  (15), 
  taken 
  together, 
  indicate 
  transverse 
  folding 
  

   quite 
  typical 
  of 
  the 
  Taconic 
  region. 
  

  

  The 
  cores 
  will 
  be 
  preserved 
  at 
  the 
  National 
  Museum. 
  

  

  Pittsfield, 
  Mass., 
  July 
  11, 
  1913. 
  

  

  *Op. 
  cit., 
  this 
  Journal, 
  fig. 
  2 
  (B). 
  

   flbid., 
  pp. 
  101, 
  102. 
  

  

  