﻿244 
  Richardson 
  — 
  Note 
  on 
  the 
  Age 
  of 
  the 
  Scranton 
  Coal. 
  

  

  Platanus 
  rhomboidalis 
  Lx. 
  

  

  Platanus 
  raynoldsii 
  Newb. 
  

  

  Populus 
  nebrascensis 
  Newb. 
  

  

  Vitis 
  olriki 
  Heer 
  

  

  Cissus 
  lobatus-crenata 
  Lx. 
  

  

  Fraxinus 
  eocenica 
  Lx. 
  

  

  Sequoia 
  longsdorfii 
  (Brgt.) 
  Heer 
  

  

  Lygodium 
  kaulfussi 
  

  

  Carya 
  antiquorum 
  Lx. 
  

  

  Salix 
  augusta 
  Al. 
  Br. 
  

  

  Knowlton 
  reports 
  that 
  these 
  leaves 
  are 
  of 
  post-Laramie 
  

   (Denver) 
  age. 
  They 
  indicate, 
  therefore, 
  a 
  reassignment 
  of 
  the 
  

   age 
  of 
  the 
  Scranton 
  coal 
  and 
  the 
  consequent 
  modification 
  of 
  

   the 
  constitution 
  and 
  delimitation 
  of 
  the 
  Laramie 
  formation 
  in 
  

   the 
  type 
  area. 
  

  

  This 
  conclusion 
  is 
  corroborated 
  by 
  the 
  record 
  of 
  a 
  well 
  sunk 
  

   in 
  search 
  of 
  oil 
  near 
  Sable 
  Station 
  on 
  the 
  Union 
  Pacific 
  Rail- 
  

   road 
  in 
  sec. 
  24, 
  T. 
  3 
  S., 
  R. 
  67 
  W., 
  about 
  midway 
  between 
  

   Denver 
  and 
  Scranton. 
  The 
  record 
  was 
  obtained 
  by 
  Willis 
  T. 
  

   Lee 
  who, 
  at 
  my 
  suggestion, 
  visited 
  the 
  Denver 
  Basin 
  in 
  1915 
  

   and 
  kindly 
  turned 
  his 
  results 
  over 
  to 
  me. 
  Unfortunately 
  the 
  

   drillers 
  did 
  not 
  keep 
  the 
  critical 
  part 
  of 
  the 
  record 
  in 
  writing 
  

   but 
  the 
  results 
  were 
  confirmed 
  independently 
  by 
  two 
  men 
  con- 
  

   nected 
  with 
  the 
  work. 
  It 
  is 
  reported 
  that 
  a 
  bed 
  of 
  con- 
  

   glomerate 
  50 
  feet 
  thick, 
  thought 
  to 
  be 
  the 
  Arapahoe, 
  was 
  

   encountered 
  in 
  the 
  well 
  about 
  350 
  feet 
  below 
  the 
  Scranton 
  

   coal 
  and 
  about 
  700 
  feet 
  above 
  a 
  coal 
  zone 
  thought 
  to 
  mark 
  the 
  

   lower 
  part 
  of 
  the 
  Laramie 
  formation. 
  Because 
  the 
  record 
  is 
  

   from 
  memory 
  it 
  should 
  not 
  be 
  given 
  too 
  much 
  credence, 
  never- 
  

   theless 
  it 
  is 
  of 
  interest 
  as 
  supporting 
  the 
  evidence 
  of 
  the 
  fossil 
  

   leaves 
  that 
  the 
  Scranton 
  coal 
  is 
  of 
  post-Laramie 
  age. 
  

  

  