﻿55 
  I 
  NBW 
  TORE 
  IM 
  

  

  I. 
  p. 
  Bishop 
  (33) 
  Pound 
  the 
  facta 
  gathered 
  b\ 
  him 
  in 
  regard 
  to 
  the 
  

   limestone 
  belts 
  in 
  Colombia 
  countj 
  "suggestive 
  of 
  a 
  synclinal 
  

   having 
  the 
  Trenton 
  limestone 
  outcropping 
  on 
  both 
  sides, 
  and 
  

  

  ! 
  i 
  the 
  edge 
  pushed 
  over 
  westward." 
  As 
  a 
  synclinal 
  is 
  only 
  

   the 
  complemenl 
  of 
  an 
  anticlinal, 
  these 
  observations 
  prove 
  the 
  

  

  rfolded 
  character 
  of 
  th< 
  in 
  Hudson 
  valley 
  region 
  directly 
  

  

  .south 
  of 
  the 
  in. 
  ted 
  area* 
  That 
  the 
  Tiacondc 
  mountain 
  

  

  range 
  t<> 
  the 
  east 
  of 
  our 
  territory 
  is 
  built 
  after 
  the 
  Appalachian 
  

   type 
  has 
  been 
  demonstrated 
  by 
  I. 
  E. 
  Wolff 
  (45) 
  in 
  an 
  elaborate 
  

   paper 
  in 
  which 
  it 
  is 
  shown 
  that 
  the 
  IToosac 
  mountain 
  is 
  an 
  anti- 
  

   cline. 
  "This 
  anticline 
  preserves 
  the 
  recks 
  iii 
  their 
  normal 
  posi- 
  

   tion 
  on 
  the 
  east 
  side, 
  but 
  on 
  the 
  west 
  they 
  are 
  folded 
  under 
  in 
  

   inverse 
  position 
  with 
  eastern 
  dip." 
  1 
  

  

  : 
  Otologic 
  profile 
  of 
  Hoosac 
  mountain. 
  After 
  I. 
  E. 
  Wolff. 
  (45 
  pi. 
  6, 
  5a) 
  

  

  With 
  the 
  presence 
  of 
  folds 
  of 
  Appalachian 
  type 
  to 
  the 
  -south 
  

  

  and 
  easl 
  of 
  our 
  region, 
  the 
  assumption 
  of 
  an 
  anticlinal 
  with 
  

  

  undermined 
  west 
  sides 
  to 
  explain 
  the 
  inversion 
  of 
  the 
  zones, 
  

  

  does 
  not 
  seem 
  to 
  be 
  hazardous. 
  

  

  It 
  was 
  long 
  ago 
  proved 
  by 
  the 
  Professors 
  Rogers 
  (2) 
  that 
  the 
  

  

  Faults 
  in 
  southwestern 
  Virginia 
  lie 
  in 
  the 
  direction 
  of 
  axes 
  

  

  of 
  plications 
  instead 
  of 
  in 
  monoclina] 
  strata 
  and 
  "coincide 
  in 
  the 
  

  

  ii 
  majority 
  of 
  instances 
  with 
  the 
  steep 
  or 
  inverted 
  sides 
  of 
  

  

  the 
  flexuri 
  It 
  has 
  been 
  farther 
  demonstrated 
  thai 
  overfolda 
  

  

  often 
  change 
  into 
  overthrusts, 
  and 
  theoretically 
  should 
  do 
  so, 
  as 
  

  

  □ 
  as 
  the 
  differential 
  stress 
  of 
  the 
  layers 
  reaches 
  their 
  ultimate 
  

  

  h 
  (see 
  the 
  lucid 
  exposition 
  <»f 
  these 
  relatione 
  by 
  C. 
  R. 
  Van 
  

  

  ii 
  se, 
  52), 
  The 
  wonderful 
  regularity 
  with 
  which 
  these 
  over- 
  

  

  qsI 
  faults 
  appear 
  in 
  the 
  steep 
  western 
  Bides 
  of 
  the 
  numerous 
  

  

  ds 
  of 
  the 
  Appalachian 
  mountain 
  system 
  has 
  been 
  fully 
  de- 
  

  

  mon 
  r] 
  \<\ 
  Bailey 
  Willis 
  1 
  13). 
  

  

  One 
  of 
  the 
  profiles 
  has 
  been 
  copied 
  to 
  illustrate 
  tbia 
  type 
  of 
  mountain 
  

  

  1 
  1 
  

  

  