﻿246 
  Lahee 
  — 
  New 
  Fossiliferous 
  Horizon 
  and 
  Underlying 
  

  

  plays, 
  although 
  not 
  always 
  so 
  obviously, 
  the 
  same 
  southwest- 
  

   ward 
  advance 
  in 
  metamorphism. 
  

  

  Structure 
  and 
  correlation. 
  — 
  That 
  Blueberry 
  Mt. 
  is 
  thought 
  

   to 
  be 
  synclinal 
  in 
  structure 
  has 
  been 
  stated 
  before. 
  This 
  

   conclusion 
  is 
  based, 
  not 
  so 
  much 
  upon 
  an 
  inverse 
  succes- 
  

   sion 
  of 
  well-marked 
  strata, 
  as 
  upon 
  the 
  exposure 
  of 
  pre- 
  

   Niagaran 
  rocks 
  which 
  are 
  nearly 
  identical 
  on 
  opposite 
  flanks 
  of 
  

   the 
  ridge. 
  We 
  are 
  unable 
  at 
  present 
  to 
  locate 
  the 
  axial 
  region 
  

   of 
  this 
  fold. 
  For 
  some 
  reasons 
  it 
  seems 
  to 
  be 
  in 
  or 
  near 
  the 
  

   long 
  belt 
  of 
  banded 
  argillites. 
  Dips 
  (which 
  have 
  been 
  omitted 
  

   from 
  the 
  map) 
  are 
  usually 
  steep, 
  so 
  steep, 
  indeed, 
  that 
  varia- 
  

   tions 
  in 
  direction 
  within 
  the 
  area 
  mapped 
  are 
  probably 
  due 
  to 
  

   local 
  contortion 
  rather 
  than 
  to 
  actual 
  synclinal 
  or 
  anticlinal 
  

   folding 
  on 
  a 
  small 
  scale. 
  Below 
  are 
  listed 
  the 
  dips 
  for 
  those 
  

   localities 
  where 
  the 
  attitude 
  of 
  the 
  bedding 
  could 
  be 
  obtained 
  : 
  

  

  Locality 
  Dip 
  Locality 
  Dip 
  

  

  6 
  

  

  80° 
  

  

  southward. 
  

  

  34 
  

  

  80° 
  northward 
  

  

  7 
  

  

  75° 
  

  

  a 
  

  

  35 
  

  

  70° 
  southward 
  

  

  8 
  

  

  70° 
  

  

  n 
  

  

  36 
  

  

  60° 
  " 
  

  

  9 
  

  

  60° 
  

  

  a 
  

  

  37 
  

  

  75° 
  

  

  18 
  

  

  60° 
  

  

  a 
  

  

  38 
  

  

  . 
  78° 
  

  

  21 
  

  

  80° 
  

  

  a 
  

  

  39 
  

  

  75° 
  

  

  22 
  

  

  70° 
  

  

  a 
  

  

  41 
  

  

  60° 
  northward 
  

  

  23 
  

  

  85° 
  

  

  a 
  

  

  42 
  

  

  80° 
  southward 
  

  

  27 
  

  

  85° 
  

  

  a 
  

  

  43 
  

  

  80° 
  " 
  

  

  28 
  

  

  70° 
  

  

  northward. 
  

  

  44 
  

  

  80° 
  northward, 
  

  

  30 
  

  

  75° 
  

  

  u 
  

  

  45 
  

  

  80° 
  " 
  

  

  31 
  

  

  72° 
  

  

  a 
  

  

  

  

  As 
  regards 
  the 
  relations 
  of 
  the 
  Fitch 
  Hill 
  exposures 
  of 
  

   banded 
  argillite, 
  we 
  cannot 
  now 
  say 
  whether 
  they 
  are 
  continuous 
  

   with 
  the 
  outcrops 
  at 
  Locs. 
  17 
  and 
  18 
  or 
  with 
  the 
  belt 
  including 
  

   Locs. 
  25 
  and 
  28. 
  Various 
  conjectures 
  might 
  be 
  made. 
  A 
  fault 
  

   might 
  have 
  caused 
  an 
  offset. 
  Overlap 
  might 
  explain 
  the 
  in- 
  

   creasing 
  thickness 
  of 
  the 
  Blueberry 
  Mt. 
  series 
  south 
  west 
  ward. 
  

   Or 
  the 
  exposures 
  at 
  17 
  and 
  18 
  might 
  be 
  at 
  the 
  same 
  horizon 
  as 
  

   those 
  of 
  25 
  and 
  28, 
  but 
  on 
  the 
  opposite 
  limb 
  of 
  a 
  fold. 
  This 
  

   paper 
  is 
  not 
  concerned 
  with 
  the 
  full 
  discussion 
  of 
  the 
  geological 
  

   structure 
  of 
  the 
  region. 
  We 
  shall 
  leave 
  these 
  matters 
  to 
  

   future 
  investigators 
  for 
  settlement. 
  

  

  One 
  significant 
  point 
  we 
  do 
  wish 
  to 
  emphasize, 
  however. 
  

   Cross-bedding 
  in 
  the 
  sandstone 
  of 
  Loc. 
  22 
  and 
  contemporaneous 
  

   erosion 
  at 
  Loc. 
  27 
  show 
  that 
  relatively 
  higher 
  beds, 
  strati- 
  

   graphically, 
  are 
  in 
  each 
  case 
  to 
  the 
  south, 
  and 
  that, 
  con- 
  

   sequently, 
  all 
  the 
  strata 
  from 
  the 
  valley 
  up 
  to 
  Loc. 
  27 
  belong 
  

   to 
  the 
  same 
  limb 
  of 
  a 
  fold. 
  

  

  