﻿FIFTH 
  REPORT 
  OF 
  THE 
  DIRECTOR 
  I908 
  

  

  189 
  

  

  ''surface 
  thrusts" 
  (Willis). 
  As 
  an 
  example 
  we 
  insert 
  a 
  portion 
  

   [text 
  fig-. 
  31] 
  of 
  the 
  Rome 
  (Ga.) 
  folio, 
  showing- 
  inliers 
  of 
  Cambric 
  

  

  Fig. 
  30 
  Wedge 
  inlier 
  from 
  Briceville 
  folio, 
  Tenn. 
  I'lili'.iiiilji 
  Silu 
  

   wood 
  formation) 
  

  

  ric 
  (Rock- 
  

  

  ■^r.z.:rz^ 
  Carbon- 
  

  

  iferous 
  (Lee 
  conglomerate) 
  

  

  W'.'.'!'} 
  Devomc 
  (Chatanooga 
  shale); 
  

  

  K^VV\N 
  Carboniferous 
  (Briceville 
  shale). 
  Scale 
  

  

  r^/cks 
  in 
  Carboniferous 
  beds, 
  appearing 
  as 
  small 
  synclines, 
  but 
  

   which 
  in 
  fact, 
  as 
  shown 
  by 
  the 
  section 
  are 
  but 
  the 
  erosion 
  remnants 
  

   of 
  a 
  huge, 
  closely 
  folded 
  overthrust 
  plate 
  of 
  the 
  kind 
  that 
  has 
  been 
  

   so 
  much 
  discussed 
  in 
  late 
  years 
  by 
  the 
  Alpine 
  geologists 
  [their 
  

   " 
  Ueberschiebungen 
  " 
  or 
  " 
  charriages," 
  sec 
  text 
  fig. 
  32]. 
  

  

  It 
  is 
  possible 
  that 
  the 
  slate 
  belt 
  of 
  eastern 
  New 
  York 
  represents 
  

   such 
  an 
  overthrust 
  region 
  of 
  the 
  first 
  order. 
  We 
  see 
  the 
  strongest 
  

   arguments 
  for 
  this 
  view 
  in 
  the 
  long 
  fault 
  that 
  separates 
  the 
  Lower 
  

   Siluric 
  and 
  Cambric 
  rocks 
  east 
  of 
  the 
  Hudson 
  which 
  is 
  known 
  to 
  be 
  

   an 
  overthrust 
  fault; 
  and 
  in 
  the 
  fact 
  that 
  in 
  several 
  places, 
  as 
  most 
  

   clearly 
  near 
  Whitehall, 
  the 
  littoral 
  facies 
  of 
  the 
  Cambric 
  and 
  Lower 
  

   Siluric 
  (Potsdam 
  sandstone, 
  Beekmantown 
  dolomite 
  and 
  Trenton 
  

   limestone) 
  and 
  the 
  graptoli'te-bearing 
  shale 
  facies 
  of 
  the 
  same 
  

   formations 
  come 
  into 
  contact, 
  which 
  implies 
  — 
  granted 
  the 
  original 
  

   separation 
  of 
  the 
  two 
  facies 
  by 
  either 
  a 
  barrier 
  or 
  differences 
  of 
  

   depth 
  — 
  an 
  extensive 
  westward 
  transportation 
  of 
  the 
  shales. 
  If 
  

  

  