﻿306 
  W. 
  A. 
  Verwiebe 
  — 
  Correlation 
  of 
  the 
  

  

  ford), 
  in 
  Warren 
  County 
  on 
  the 
  road 
  to 
  Enterprise," 
  where 
  " 
  it 
  

   is 
  finely 
  exposed 
  and 
  very 
  fossiliferous 
  near 
  its 
  base." 
  This 
  

   last-named 
  place 
  was 
  visited 
  by 
  the 
  writer 
  and 
  it 
  was 
  found 
  

   that 
  the 
  exposure 
  showed 
  not 
  the 
  Corry 
  sandstone, 
  but 
  a 
  sand- 
  

   stone 
  located 
  stratigraphicaliy 
  about 
  180 
  feet 
  lower, 
  the 
  first 
  

   Yenango 
  sandstone. 
  In 
  the 
  volume 
  mentioned 
  above 
  White 
  

   has 
  described 
  numerous 
  sections 
  involving 
  the 
  Corry 
  sandstone, 
  

   but 
  nowhere 
  does 
  he 
  mention 
  the 
  occurrence 
  of 
  fossils, 
  although 
  

   that 
  is 
  his 
  custom 
  in 
  the 
  case 
  of 
  other 
  formations. 
  It 
  appears, 
  

   therefore, 
  that 
  the 
  Corry 
  must 
  be 
  considered 
  essentially 
  an 
  

   unfossiliferous 
  sandstone. 
  

  

  This 
  conclusion 
  does 
  not 
  seem 
  to 
  be 
  in 
  harmony 
  with 
  the 
  

   findings 
  of 
  Dr. 
  Girty. 
  In 
  a 
  paper 
  recently 
  published," 
  he 
  

   aims 
  to 
  show 
  that 
  the 
  Bedford 
  formation 
  of 
  Ohio 
  is 
  Devonian 
  

   in 
  age. 
  The 
  Bedford 
  is 
  admittedly 
  found 
  beneath 
  the 
  Berea 
  

   and 
  in 
  order 
  to 
  strengthen 
  the 
  case 
  the 
  fauna 
  of 
  the 
  latter 
  is 
  

   adduced 
  and 
  an 
  attempt 
  made 
  to 
  show 
  that 
  it 
  is 
  Carboniferous. 
  

   Inasmuch 
  as 
  the 
  Berea 
  is 
  practically 
  barren 
  in 
  Ohio, 
  its 
  corre- 
  

   late 
  the 
  Corry 
  is 
  analyzed 
  faunally. 
  No 
  sections 
  are 
  given 
  

   and 
  the 
  only 
  clue 
  to 
  guide 
  the 
  reader 
  in 
  deciding 
  where 
  the 
  

   fossils 
  were 
  found 
  is 
  the 
  following 
  statement 
  : 
  " 
  The 
  ' 
  Corry 
  ' 
  

   horizon 
  carrying 
  the 
  fauna 
  can 
  be 
  traced 
  eastward 
  to 
  Cobham's 
  

   hill 
  just 
  east 
  of 
  Warren, 
  where 
  it 
  comes 
  in 
  immediately 
  above 
  

   what 
  has 
  been 
  called 
  the 
  ' 
  sub-Olean 
  conglomerate' 
  (Knapp 
  

   formation), 
  in 
  the 
  short 
  interval 
  which 
  separates 
  that 
  formation 
  

   from 
  the 
  Olean 
  conglomerate." 
  This 
  locality 
  (Cobham's 
  hill) 
  

   was 
  visited 
  by 
  the 
  writer, 
  and 
  it 
  was 
  found 
  that 
  the 
  fossilifer- 
  

   ons 
  horizon 
  corresponds 
  stratigraphicaliy 
  to 
  the 
  Yenango 
  first 
  

   sandstone. 
  This 
  can 
  be 
  traced 
  very 
  easily 
  along 
  the 
  Allegheny 
  

   Hiver 
  toward 
  the 
  south 
  in 
  the 
  numerous 
  rock 
  cuts 
  along 
  the 
  

   railroad, 
  and 
  is 
  found 
  to 
  underlie 
  the 
  Berea 
  or 
  Corry 
  by 
  an 
  

   interval 
  of 
  about 
  180 
  feet. 
  It 
  is 
  very 
  easy 
  to 
  see, 
  however, 
  

   how 
  these 
  two 
  sandstones 
  might 
  be 
  confused. 
  Both 
  are 
  very 
  

   similar 
  lithologically 
  and 
  both 
  are 
  overlain 
  by 
  bluish 
  shales, 
  

   the 
  Orangeville 
  and 
  the 
  Biceville 
  respectively. 
  One 
  important 
  

   guide 
  to 
  their 
  separation 
  is 
  a 
  layer 
  of 
  very 
  calcareous 
  sandstone 
  

   at 
  the 
  very 
  base 
  of 
  the 
  Corry. 
  This 
  resembles 
  the 
  Meadville 
  

   limestone 
  in 
  every 
  detail, 
  breaks 
  with 
  a 
  conchoidal 
  fracture, 
  

   and 
  is 
  usually 
  very 
  hard 
  and 
  covered 
  with 
  a 
  ferruginous 
  crust. 
  

   In 
  addition 
  the 
  base 
  of 
  the 
  Orangeville 
  is 
  generally 
  quite 
  fos- 
  

   siliferons, 
  the 
  characteristic 
  genera 
  being 
  Lingula 
  and 
  Discina. 
  

   This 
  is 
  not 
  true 
  of 
  the 
  Biceville 
  formation 
  above 
  the 
  first 
  

   Yenango 
  sandstone. 
  

  

  If 
  it 
  should 
  be 
  found 
  that 
  a 
  confusion 
  of 
  sandstones 
  has 
  

   occurred 
  here 
  then 
  a 
  peculiar 
  anomalous 
  situation 
  arises. 
  Since 
  

   the 
  Yenango 
  sandstone 
  lies 
  considerably 
  below 
  the 
  Corry, 
  the 
  

  

  * 
  Ann. 
  N. 
  Y. 
  Acad. 
  Sci., 
  vol. 
  xxii, 
  p. 
  295-319, 
  Nov., 
  1912. 
  

  

  