﻿326 
  H. 
  L. 
  /Smyth 
  — 
  Geology 
  of 
  Steep 
  Rock 
  Lake, 
  Out. 
  

  

  evident 
  stratigraphical 
  succession 
  in 
  the 
  various 
  members, 
  the 
  

   banded 
  schists 
  predominating 
  towards 
  the 
  top. 
  The 
  peculiar 
  

   gray 
  green 
  color 
  and 
  close 
  texture 
  are 
  characteristic 
  of 
  the 
  

   rocks 
  of 
  this 
  horizon. 
  The 
  thickness 
  is 
  about 
  1400 
  feet. 
  

  

  Formation 
  VIII. 
  The 
  agglomerate 
  is 
  best 
  seen 
  at 
  Jack 
  

   Pine 
  Point 
  and 
  at 
  locality 
  79 
  to 
  the 
  south 
  of 
  it. 
  At 
  locality 
  

   79, 
  it 
  consists 
  of 
  pebble-like 
  inclusions, 
  greatly 
  resembling 
  the 
  

   type 
  rock 
  of 
  Formation 
  VI, 
  imbedded 
  in 
  a 
  light 
  gray-green 
  fissile 
  

  

  matrix 
  which 
  is 
  bright 
  on 
  the 
  

   cleavage 
  surfaces. 
  The 
  inclu- 
  

   sions 
  vary 
  in 
  size 
  from 
  a 
  frac- 
  

   tion 
  of 
  an 
  inch 
  up 
  to 
  5 
  or 
  6 
  

   in. 
  long 
  diameter. 
  They 
  are 
  

   elongated, 
  and 
  have 
  rounded 
  

   outlines, 
  though 
  tapering 
  to 
  

   rather 
  sharp 
  points. 
  They 
  

   are 
  all 
  of 
  the 
  same 
  material, 
  

   which 
  is 
  the 
  same 
  as 
  the 
  mat- 
  

   rix 
  apparently, 
  differing 
  from 
  

   it 
  only 
  in 
  lacking 
  the 
  schistose 
  

   structure. 
  They 
  are 
  hardly 
  

   distinguishable 
  from 
  the 
  mat- 
  

   ^ 
  „ 
  ^» 
  / 
  ^ 
  ,*>/" 
  r 
  n 
  srfi 
  *=> 
  c 
  rix 
  in 
  color, 
  on 
  the 
  fresh 
  f 
  rac- 
  

   J 
  tine, 
  but 
  on 
  the 
  weathered 
  

   i 
  1 
  f 
  j 
  2 
  surface 
  the 
  inclusions 
  stand 
  

  

  Fig. 
  l.— 
  Agglomerate, 
  Loc. 
  The 
  shaded 
  out, 
  and 
  weather 
  a 
  lighter 
  

  

  inclusions 
  in 
  nature 
  are 
  lighter 
  in 
  color 
  brown. 
  Under 
  the 
  micro- 
  

   than 
  the 
  enclosing 
  green 
  schist. 
  The 
  wav- 
  'i 
  i 
  n 
  pl 
  n< 
  >i 
  OTls 
  arp 
  s 
  PPT1 
  

  

  ing 
  lines 
  indicate 
  plications 
  in 
  the 
  matrix. 
  sc0 
  P 
  e 
  r 
  . 
  ne 
  Inclusions 
  are 
  seen 
  

  

  to 
  consist 
  of 
  an 
  eruptive 
  rock 
  

   entirely 
  similar 
  to 
  the 
  massive 
  form 
  of 
  VII. 
  On 
  Jack 
  Pine 
  

   Point 
  the 
  agglomerate 
  is 
  beautifully 
  plicated 
  and 
  the 
  inclu- 
  

   sions 
  follow 
  the 
  little 
  folds. 
  (Fig. 
  1.) 
  

  

  Formation 
  IX. 
  Above 
  the 
  agglomerate, 
  at 
  locality 
  81 
  a 
  

   fine 
  grained 
  clay 
  slate 
  is 
  found, 
  which 
  besides 
  a 
  perfect 
  slaty 
  

   cleavage 
  in 
  the 
  regional 
  direction, 
  shows 
  alternating 
  light 
  and 
  

   dark 
  bands, 
  which 
  probably 
  represent 
  planes 
  of 
  deposition. 
  

  

  Structure. 
  — 
  The 
  Steep 
  Rock 
  Series 
  is 
  folded 
  into 
  an 
  eastern 
  

   synclinal, 
  a 
  middle 
  anticlinal 
  and 
  a 
  western 
  synclinal, 
  which 
  is 
  

   faulted 
  across 
  the 
  axis 
  near 
  the 
  sharp 
  turn. 
  

  

  A 
  line 
  drawn 
  from 
  the 
  limestone 
  exposure 
  at 
  the 
  head 
  of 
  

   Falls 
  Bay 
  to 
  Jack 
  Pine 
  Point 
  indicates 
  approximately 
  the 
  

   position 
  of 
  the 
  axial 
  plane 
  of 
  the 
  eastern 
  synclinal. 
  East 
  of 
  

   this 
  line 
  the 
  various 
  members 
  uniformly 
  strike 
  to 
  the 
  west 
  of 
  

   north. 
  The 
  dips 
  are 
  high 
  to 
  the 
  S.W. 
  ranging 
  from 
  vertical 
  to 
  

   60, 
  and 
  on 
  the 
  average 
  may 
  be 
  taken 
  at 
  70. 
  From 
  the 
  

   agglomerate 
  at 
  Jack 
  Pine 
  Point 
  southward 
  to 
  the 
  point 
  north 
  

   of 
  Pine 
  Beach, 
  where 
  the 
  upper 
  part 
  of 
  Formation 
  IV 
  is 
  ex- 
  

  

  