﻿308 
  

  

  IT. 
  A. 
  Verwiebe 
  — 
  Correlation 
  of 
  the 
  

  

  Such 
  a 
  locality 
  as 
  this 
  is 
  found 
  two 
  miles 
  east 
  of 
  Strongsville, 
  

   Ohio, 
  along 
  Willow 
  brook. 
  This 
  section 
  is 
  No. 
  107 
  in 
  fig. 
  5 
  

   and 
  shows 
  172 
  feet 
  of 
  Boy 
  al 
  ton 
  exposed 
  with 
  about 
  GO 
  feet 
  

  

  covered, 
  a 
  total 
  of 
  232 
  feet. 
  

  

  Brecksville: 
  — 
  This 
  name 
  was 
  applied 
  by 
  Prosser 
  to 
  the 
  

   upper 
  and 
  largest 
  part 
  of 
  the 
  terrane 
  which 
  is 
  equivalent 
  to 
  

   the 
  Orangeville 
  of 
  Pennsylvania. 
  The 
  other 
  members 
  are 
  the 
  

   Aurora 
  sandstone 
  and 
  Sunbury 
  shale. 
  The 
  formation 
  consists 
  

  

  Fig. 
  5. 
  

  

  I 
  o 
  7 
  

  

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  Fig. 
  5. 
  Sections 
  showing 
  the 
  variation 
  in 
  the 
  Mississippian 
  from 
  west 
  to 
  east. 
  

  

  of 
  shale 
  generally 
  dark 
  in 
  color 
  and 
  prevailingly 
  argillaceous. 
  

   In 
  thickness 
  it 
  varies 
  from 
  about 
  70 
  to 
  115 
  feet. 
  

  

  Aurora 
  sandstone 
  : 
  — 
  This 
  is 
  a 
  rather 
  local 
  member 
  of 
  the 
  

   Orangeville 
  terrane 
  in 
  Ohio. 
  It 
  was 
  named 
  from 
  Aurora 
  creek 
  

   in 
  the 
  northwestern 
  part 
  of 
  Portage 
  County, 
  Ohio.* 
  Here 
  it 
  

   is 
  a 
  blue, 
  fine-grained 
  sandstone 
  six 
  feet 
  thick 
  with 
  some 
  thin 
  

   shale 
  partings. 
  Elsewhere 
  it 
  is 
  frequently 
  a 
  single 
  unit 
  and 
  of 
  

   considerable 
  value 
  as 
  a 
  stratigraphic 
  horizon. 
  It 
  is 
  clearly 
  

   recognizable 
  as 
  far 
  east 
  as 
  Warren, 
  Ohio, 
  but 
  beyond 
  that 
  it 
  

   soon 
  loses 
  its 
  identity. 
  

  

  Sunbury 
  shale 
  : 
  — 
  This 
  is 
  a 
  familiar 
  term 
  to 
  a 
  stratigraphic 
  

   geologist. 
  The 
  name 
  was 
  first 
  applied 
  by 
  Prof. 
  Hicks 
  (1878) 
  

   and 
  has 
  since 
  been 
  discussed 
  a 
  good 
  deal 
  in 
  connection 
  with 
  

  

  *Geol. 
  Sur. 
  Ohio, 
  Bull. 
  15, 
  p. 
  211, 
  1912. 
  

  

  