﻿314 
  W. 
  .A. 
  Verwiebe 
  — 
  Correlation 
  of 
  the 
  

  

  valuable 
  one, 
  inasmuch 
  as 
  it 
  shows 
  the 
  formations 
  from 
  the 
  

   upper 
  Meadville 
  down 
  through 
  the 
  Oorry 
  and 
  well 
  into 
  the 
  

   Cussewago, 
  in 
  great 
  detail. 
  The 
  Corry 
  is 
  here 
  shown 
  to 
  have 
  

   a 
  thickness 
  of 
  13 
  feet 
  and 
  8 
  inches 
  and 
  the 
  Orangeville 
  of 
  81 
  

   feet 
  and 
  10 
  inches, 
  while 
  the 
  Sharpsville 
  is 
  55 
  feet 
  11 
  inches 
  

   and 
  the 
  lower 
  Meadville 
  40 
  feet 
  and 
  8 
  inches 
  thick. 
  

  

  6a. 
  Shaws 
  School 
  House 
  Section. 
  

  

  Thickness 
  

   No. 
  Feet. 
  

  

  15. 
  Shenango 
  Sandstone. 
  White 
  quartz 
  rock, 
  weathering 
  

  

  buff 
  and 
  brown, 
  massive 
  layers, 
  iron 
  concretions 
  11 
  

  

  14. 
  Meadville 
  upper. 
  Largely 
  thin 
  sandstones 
  with 
  some 
  

  

  argillaceous 
  shales 
  interbedded 
  80 
  

  

  13. 
  Mead, 
  upper 
  Limestone. 
  Blue, 
  siliceous, 
  conchoidal 
  f 
  

  

  12. 
  Mead, 
  lower. 
  Shale, 
  bluish, 
  with 
  numerous 
  sandy 
  layers 
  26 
  

  

  11. 
  Sharpsville 
  upper. 
  Sandstone, 
  brownish 
  gray, 
  irregu- 
  

  

  lar 
  layers 
  25 
  

  

  10. 
  Mead, 
  lower 
  Limestone. 
  Fine 
  development, 
  breaks 
  up 
  

  

  into 
  several 
  layers 
  ; 
  much 
  iron, 
  concretionary 
  _ 
  _ 
  1 
  \ 
  

  

  9. 
  Sharpsville 
  lower. 
  Sandstone, 
  irregular 
  layers, 
  dull 
  

  

  chocolate 
  color, 
  flaggy 
  22 
  

  

  8. 
  Limestone 
  _ 
  f 
  

  

  V. 
  Covered 
  5^ 
  

  

  6. 
  Sandstone, 
  very 
  thin, 
  bluish 
  grey, 
  separated 
  by 
  a 
  few 
  

  

  thin 
  zones 
  of 
  clay 
  shale 
  15f 
  

  

  5. 
  Orangeville. 
  Shale, 
  rather 
  arenaceous 
  ; 
  upper 
  part 
  is 
  

  

  bluish 
  black 
  in 
  color 
  and 
  more 
  argillaceous; 
  middle 
  

  

  largely 
  occupied 
  by 
  thin 
  sandstone 
  ._ 
  24 
  

  

  4. 
  Shale, 
  blue, 
  argillaceous; 
  thin 
  sandstone 
  25j 
  

  

  3. 
  Covered 
  _ 
  _.. 
  18 
  

  

  2. 
  Sandstone, 
  ash 
  gray, 
  hard, 
  fine-grained 
  3 
  

  

  1 
  . 
  Shale, 
  typical, 
  rusty 
  outcrop 
  ._ 
  4 
  

  

  This 
  section 
  was 
  measured 
  in 
  the 
  ravine 
  which 
  passes 
  the 
  

   Shaws 
  schoolhouse. 
  Shaws 
  is 
  a 
  small 
  station 
  on 
  the 
  Erie 
  rail- 
  

   road 
  about 
  eight 
  miles 
  south 
  of 
  Meadville, 
  Pennsylvania. 
  

  

  18<i. 
  Torpedo 
  Section. 
  

  

  Thickness 
  

  

  No. 
  Feet. 
  

  

  12. 
  Conoquenessing. 
  Sandstone, 
  very 
  massive, 
  but 
  poorly 
  

  

  cemented 
  and 
  friable; 
  composed 
  of 
  white 
  quartz 
  

   grains 
  which 
  weather 
  buff 
  on 
  exposure. 
  Scattered 
  

   through 
  the 
  mass 
  are 
  seams 
  and 
  lenses 
  of 
  small 
  

   pebbles, 
  especially 
  near 
  the 
  bottom; 
  many 
  seams 
  of 
  

   iron 
  or 
  rather 
  bands 
  of 
  quartz 
  highly 
  charged 
  with 
  

   iron 
  also 
  occur. 
  Interesting 
  are 
  the 
  clay 
  dikes, 
  some 
  

   twenty 
  feet 
  high, 
  which 
  fill 
  the 
  joint 
  planes 
  in 
  the 
  

   rock 
  _ 
  __ 
  25 
  

  

  