﻿452 
  J. 
  Barrell 
  — 
  Upper 
  Devonian 
  Delta 
  of 
  the 
  

  

  Depth 
  

   below 
  

   Thick- 
  top 
  of 
  

  

  ness 
  Sum 
  Pocono 
  

  

  Pocono 
  Sandstone 
  (its 
  top 
  taken 
  as 
  the 
  datum 
  of 
  the 
  

  

  Pocono-Catskill 
  section) 
  

  

  Gray-white 
  gritty 
  sandstone 
  with 
  scattered 
  white 
  

   quartz 
  pebbles, 
  0*5 
  to 
  1*0 
  in 
  diameter, 
  

   maximum 
  2 
  in., 
  fairly 
  well 
  rounded. 
  The 
  

   pebbles 
  are 
  in 
  places 
  concentrated 
  into 
  

   conglomerates 
  which 
  fade 
  out 
  above. 
  The 
  

   bases 
  of 
  the 
  conglomerate 
  beds 
  are 
  

   better 
  defined 
  : 
  two 
  such 
  occur 
  at 
  —100 
  

  

  and 
  -360 
  720 
  

  

  Thick 
  beds 
  of 
  conglomerate 
  and 
  grit 
  _ 
  100 
  

  

  Gritty 
  sandstone, 
  less 
  conglomeratic 
  90 
  

  

  Massive 
  conglomerate 
  resembling 
  the 
  Pottsville, 
  pebbles 
  

   white 
  quartz, 
  rounded, 
  irregular, 
  tending 
  

   to 
  prolate 
  ellipsoids, 
  average 
  0'5 
  in., 
  maxi- 
  

   mum 
  1 
  -5 
  to 
  2 
  -5 
  in 
  40 
  950 
  -950 
  

  

  Pocono-Catskill 
  Transition 
  Beds. 
  Probably 
  to 
  be 
  cor- 
  

   related 
  with 
  the 
  Catskill 
  of 
  I. 
  C. 
  White, 
  

   with 
  the 
  Pocono 
  of 
  Winslow. 
  

   Gray 
  and 
  olive 
  sandstones 
  with 
  some 
  pebble 
  beds, 
  

   more 
  argillaceous 
  than 
  the 
  adjacent 
  mem- 
  

   bers 
  and 
  making 
  talus 
  slopes. 
  Some 
  red 
  

   shale. 
  Not 
  well 
  exposed 
  on 
  this 
  section.. 
  680 
  

  

  Olive 
  green 
  sandstone, 
  ferruginous 
  _ 
  83 
  

  

  Olive 
  green 
  sandstone..., 
  . 
  207 
  970-1920 
  

  

  Catskill 
  Formation 
  {limited 
  by 
  the 
  occurrence 
  of 
  import- 
  

   ant 
  red 
  beds). 
  

   Upper 
  Shaly 
  Member. 
  Makes 
  a 
  saddle 
  between 
  

   the 
  Pocono 
  and 
  Catskill 
  ridges. 
  About 
  25 
  

   per 
  cent 
  red 
  shale. 
  

   Light 
  brown 
  sandstone 
  shading 
  above 
  into 
  a 
  

  

  soft 
  massive 
  red 
  shale 
  .... 
  16 
  

  

  Olive 
  green 
  sandstone 
  . 
  5 
  

  

  Pale 
  red 
  shales 
  showing 
  mud 
  cracks 
  of 
  

  

  rather 
  small 
  pattern 
  in 
  upper 
  portion.. 
  83 
  

   Olive 
  green 
  shales 
  and 
  sandstones 
  shading 
  at 
  the 
  

  

  bottom 
  into 
  red 
  shales 
  ... 
  47 
  

  

  Bright 
  red 
  shale 
  with 
  clear 
  mud 
  cracks.. 
  .. 
  23 
  

  

  Shaly 
  sandstone, 
  red 
  35 
  

  

  Olive 
  green 
  to 
  gray 
  sandstone, 
  no 
  shale 
  28 
  

  

  Bright 
  red 
  shale 
  28 
  

  

  Bright 
  red 
  sandstone 
  >_.. 
  10 
  

  

  Bright 
  red 
  shale 
  10 
  

  

  Red 
  sandstone, 
  shaly 
  in 
  layers, 
  possibly 
  mud 
  

  

  cracked 
  80 
  

  

  Greenish 
  sandstone 
  weathering 
  yellowish 
  gray, 
  

   muscovitic, 
  transition 
  at 
  top 
  but 
  sharp 
  

  

  below 
  105 
  

  

  Red 
  shale 
  and 
  sandstone 
  ; 
  sandstones 
  ripple- 
  

   marked 
  ; 
  shales 
  with 
  mud 
  cracks 
  and 
  

  

  probable 
  rainprints 
  30 
  

  

  Greenish 
  gray 
  sandstone 
  passing 
  into 
  red 
  above 
  and 
  

  

  below 
  through 
  10 
  feet 
  of 
  transition 
  beds. 
  . 
  40 
  

   Red 
  sandstone 
  and 
  shale 
  interbedded, 
  showing 
  

   mud 
  cracks, 
  a 
  red 
  pattern 
  on 
  a 
  mottled 
  red 
  

   and 
  yellow 
  surface. 
  Rain 
  prints. 
  These 
  

  

  marks 
  better 
  exposed 
  near 
  the 
  top 
  90 
  630 
  —2550 
  

  

  This 
  section, 
  from 
  —1920 
  to 
  —2550, 
  was 
  

   measured 
  in 
  detail 
  by 
  Mr. 
  D. 
  F. 
  Hewett 
  in 
  

   April 
  1911. 
  

  

  