﻿13S 
  K. 
  F. 
  Mother 
  — 
  Pottsville 
  Formations 
  and 
  Faunas. 
  

  

  requires 
  additional 
  paleontologic 
  data 
  for 
  its 
  determination."* 
  

   Six 
  or 
  seven 
  thousand 
  feet 
  above 
  the 
  Stanley 
  plant 
  horizon 
  

   there 
  is 
  found 
  the 
  marine 
  invertebrate 
  fauna 
  of 
  the 
  Caney 
  

   shale. 
  This 
  fauna 
  is 
  undoubtedly 
  of 
  Upper 
  Mississippian 
  age 
  

   and 
  the 
  Caney 
  shale 
  may 
  be 
  correlated 
  directly 
  with 
  the 
  

   Moorfield 
  shale, 
  Batesville 
  sandstone, 
  and 
  Fayetteville 
  shale 
  of 
  

   the 
  Boston 
  Mountains. 
  \ 
  It 
  is 
  further 
  demonstrable 
  that 
  the 
  

   Caney 
  of 
  the 
  Arbuckle 
  region 
  and 
  the 
  Caney 
  of 
  the 
  Ouachita 
  

   Mountains 
  are 
  one 
  and 
  the 
  same 
  formation. 
  

  

  So 
  carefully 
  did 
  Girty 
  entertain 
  all 
  possible 
  solutions 
  of 
  the 
  

   really 
  baffling 
  problem, 
  which 
  would 
  be 
  presented 
  if 
  the 
  Stanley 
  

   flora 
  should 
  prove 
  when 
  better 
  known 
  to 
  be 
  of 
  Pottsville 
  age, 
  

   that 
  his 
  conclusions 
  have 
  been 
  misinterpreted. 
  J. 
  B. 
  Wood- 
  

   worth 
  states, 
  " 
  The 
  fauna 
  of 
  the 
  Caney 
  shale 
  is 
  marine. 
  Girty 
  

   very 
  guardedly 
  referred 
  the 
  beds 
  to 
  the 
  Pottsville, 
  which 
  

   reference 
  Ulrich 
  (in 
  a 
  note 
  to 
  the 
  author) 
  later 
  proved 
  to 
  be 
  

   correct 
  on 
  stratigraphic 
  and 
  faunal 
  evidence. 
  "J 
  

  

  Ulrich 
  considers 
  the 
  Caney 
  shale 
  to 
  be 
  of 
  Pennsylvanian 
  

   age,§ 
  but 
  the 
  evidence 
  upon 
  which 
  his 
  conclusions 
  are 
  based 
  

   has 
  not 
  been 
  published. 
  Upon 
  his 
  authority, 
  also, 
  Purdue 
  

   has 
  referred 
  the 
  Jackfork 
  and 
  Stanley 
  to 
  the 
  Pennsylvanian.|j 
  

   In 
  this 
  regard 
  he 
  follows 
  the 
  lead 
  of 
  Branner, 
  who 
  long 
  ago 
  

   included 
  all 
  the 
  strata 
  above 
  the 
  Arkansas 
  novaculite 
  in 
  the 
  

   " 
  Lower 
  Coal 
  Measures," 
  and 
  reported 
  the 
  total 
  thickness 
  of 
  

   Pennsylvanian 
  sediments 
  in 
  Arkansas 
  as 
  23,780 
  feet. 
  - 
  

  

  With 
  the 
  facts 
  now 
  available 
  concerning 
  the 
  faunas 
  of 
  the 
  

   Wapanucka 
  and 
  Atoka 
  formations, 
  the 
  chain 
  of 
  evidence 
  would 
  

   appear 
  complete. 
  The 
  correlation 
  of 
  the 
  Caney 
  fauna 
  with 
  

   late 
  Mississippian 
  faunas 
  in 
  northern 
  Arkansas 
  is 
  further 
  

   strengthened 
  by 
  the 
  determination 
  of 
  the 
  early 
  Pottsville 
  age 
  

   of 
  the 
  immediately 
  overlying 
  strata. 
  Pennsylvanian 
  sedimen- 
  

   tation 
  in 
  the 
  Arbuckle 
  and 
  Ouachita 
  regions 
  evidently 
  began 
  

   with 
  the 
  deposition 
  of 
  the 
  Wapanucka 
  and 
  Atoka 
  formations. 
  

   The 
  Jackfork 
  and 
  Stanley 
  must 
  be 
  of 
  middle 
  or 
  late 
  Missis- 
  

   sippian 
  age, 
  and 
  their 
  enormous 
  thickness 
  is 
  the 
  result 
  of 
  unus- 
  

   ual 
  conditions 
  of 
  sedimentation 
  maintaining 
  in 
  the 
  Ouachita 
  

   region 
  at 
  that 
  time. 
  

  

  The 
  accurate 
  placing 
  in 
  the 
  time 
  scale 
  of 
  the 
  initiation 
  of 
  

   Stanley 
  sedimentation 
  must 
  await 
  further 
  paleontologic 
  discov- 
  

  

  * 
  Quoted 
  by 
  Girty, 
  loc. 
  cit., 
  p. 
  8. 
  

  

  f 
  Girty, 
  G. 
  H., 
  The 
  fauna 
  of 
  the 
  Moorfield 
  shale 
  of 
  Arkansas, 
  U. 
  S. 
  Geol. 
  

   Survey, 
  Bull. 
  439. 
  p. 
  25. 
  1911. 
  

  

  \ 
  Woodworth, 
  J. 
  B., 
  Boulder 
  beds 
  of 
  the 
  Caney 
  shales 
  at 
  Talihina, 
  Okla- 
  

   homa, 
  Bull. 
  Geol. 
  Soc. 
  America, 
  vol. 
  xxiii, 
  p. 
  457, 
  1912. 
  

  

  § 
  Ulrich, 
  E. 
  0., 
  Kevision 
  of 
  the 
  Paleozoic 
  systems, 
  Bull. 
  Geol. 
  Soc. 
  Amer- 
  

   ica, 
  vol. 
  xxii, 
  p. 
  352. 
  foot-note 
  ; 
  also 
  pi. 
  29, 
  1911. 
  

  

  |l 
  Purdue, 
  A. 
  EL, 
  The 
  slates 
  of 
  Arkansas. 
  Arkansas 
  Geol. 
  Survey, 
  p. 
  48, 
  

   1909. 
  

  

  ^[Branner, 
  J. 
  C, 
  Thickness 
  of 
  Paleozoic 
  sediments 
  in 
  Arkansas, 
  this 
  

   Journal 
  (4), 
  vol. 
  ii, 
  pp. 
  229-236, 
  1896. 
  

  

  