﻿REPORT 
  OF 
  THE 
  DIRECTOR 
  r35 
  

  

  fort 
  shales 
  must 
  be 
  over 
  100 
  feet." 
  No 
  fossils 
  were 
  found 
  above 
  

   the 
  zone 
  referred 
  to. 
  Rounded 
  concretions 
  frequently 
  occur 
  in 
  the 
  

   slate. 
  The 
  thickest 
  sandstone 
  layers, 
  (" 
  rubblestone 
  " 
  of 
  Eaton) 
  are 
  

   two 
  feet 
  thick. 
  These 
  sandy 
  layers 
  increase 
  in 
  abundance 
  toward 
  

   the 
  upper 
  portion 
  of 
  the 
  mass, 
  and 
  may 
  indicate 
  passage 
  beds 
  to 
  the 
  

   Medina. 
  The 
  latter 
  formation 
  was 
  nowhere 
  found. 
  

  

  The 
  gorge 
  of 
  Moyer 
  creek, 
  known 
  as 
  " 
  the 
  gulf," 
  was 
  followed 
  to 
  

   its 
  termination 
  above 
  Gulph 
  in 
  search 
  of 
  the 
  beds 
  of 
  the 
  Oneida 
  

   conglomerate 
  and 
  the 
  red 
  shales 
  at 
  the 
  base 
  of 
  the 
  Salina 
  stated 
  by 
  

   Yanuxem 
  ('42 
  p. 
  76 
  and 
  9('>) 
  to 
  occur 
  there. 
  Many 
  boulders 
  of 
  

   both, 
  some 
  of 
  them 
  of 
  large 
  size, 
  occur 
  along 
  the 
  gorge, 
  but 
  no 
  

   ledg.e 
  could 
  be 
  found 
  anywhere 
  in 
  the 
  vicinity. 
  The 
  evidence 
  

   afforded 
  by 
  boulders 
  in 
  this 
  region 
  is 
  wholly 
  untrustworthy, 
  since 
  

   the 
  drift 
  deposition 
  is 
  enormous, 
  as 
  notably 
  illustrated, 
  about 
  Forest- 
  

   port. 
  (See 
  Brigham 
  '89 
  p. 
  113-114 
  and 
  '95, 
  also 
  Chamberlain 
  '83.) 
  

  

  Ferguson 
  creek 
  section 
  ; 
  — 
  137 
  H 
  ; 
  — 
  West 
  branch 
  of 
  Ferguson 
  

   creek, 
  on 
  the 
  north 
  side 
  of 
  Frankfort 
  Hill. 
  

  

  H 
  1-2-3;— 
  FRANKFORT 
  SLATES 
  in 
  the 
  bed 
  of 
  the 
  west- 
  

   ern 
  branch 
  of 
  the 
  creek 
  beginning 
  near 
  its 
  union 
  with 
  the 
  creek. 
  

   In 
  appearance 
  exactly 
  the 
  same 
  as 
  the 
  Moyer 
  creek 
  exposures. 
  

   Dip 
  5° 
  S 
  50^ 
  E. 
  Directions 
  of 
  f 
  aultings, 
  IS" 
  70° 
  W 
  and 
  N 
  35° 
  E, 
  

   very 
  pronounced. 
  Lower 
  portion 
  entirely 
  shaly, 
  black, 
  showing 
  

   conchoidal 
  '^pressure 
  fracture." 
  Upper 
  portion 
  with 
  intercalated, 
  

   grayish, 
  sandstone 
  layers. 
  Fossils 
  occur 
  only 
  in 
  one 
  thiri 
  seam 
  

   near 
  the 
  base. 
  These 
  are 
  

  

  Triarthrus 
  hecTci 
  Orthis 
  (small 
  species.) 
  

  

  Orthoceras 
  (small 
  species, 
  same 
  as 
  in 
  137A1 
  and 
  141 
  A. 
  

   common.) 
  

  

  a 
  Vanuxem 
  {'42 
  p. 
  372 
  ) 
  says 
  " 
  The 
  upper 
  part 
  of 
  the 
  Frankfort 
  slate 
  in 
  many 
  places 
  alter- 
  

   nates 
  with 
  thin 
  layers 
  of 
  fine 
  grained 
  sandstone, 
  more 
  or 
  less 
  intermixed 
  with 
  the 
  matter 
  of 
  

   the 
  slate; 
  both 
  by 
  long 
  exposure 
  to 
  the 
  air 
  assume 
  a 
  dark 
  green 
  or 
  olive 
  colour, 
  by 
  which 
  they 
  

   are 
  readily 
  distinguished 
  from 
  the 
  black 
  (.=Utiea) 
  slate, 
  which 
  changes 
  to 
  a 
  brown. 
  Fossils 
  

   are 
  rare 
  in 
  the 
  lower 
  part 
  of 
  the 
  Frankfort 
  slate 
  but 
  are 
  numerous 
  in 
  the 
  upper 
  part 
  where 
  it 
  

   adjoins 
  the 
  next 
  series, 
  the 
  Pulaski 
  shales 
  ... 
  To 
  which 
  of 
  these 
  two 
  masses 
  they 
  belong 
  has 
  

   not 
  been 
  determined." 
  

  

  Vanuxem's 
  classification 
  ('42 
  p. 
  60-61) 
  is 
  

  

  Upper 
  division 
  i= 
  Pulaski. 
  

  

  ^ 
  Lower 
  division 
  =: 
  Frankfort 
  shale 
  and 
  rubblestone. 
  

   Utica 
  group, 
  thickness 
  2U0 
  feet. 
  

  

  