﻿134 
  K. 
  F. 
  Mather 
  — 
  Pottsville 
  Formations 
  and 
  Faunas. 
  

  

  overlain 
  by 
  the 
  successive 
  formations 
  of 
  the 
  " 
  Arkansas 
  Coal 
  

   Measures/'* 
  

  

  Along 
  the 
  eastern 
  flank 
  of 
  the 
  Arbuckle 
  uplift, 
  the 
  Atoka 
  

   is 
  underlain 
  conformably 
  by 
  the 
  Wapanucka 
  limestonef 
  which 
  

   approximates 
  150 
  feet 
  in 
  thickness 
  and 
  rests 
  with 
  probable 
  dis- 
  

   conformity 
  upon 
  the 
  Caney 
  shale. 
  Farther 
  west, 
  the 
  Franks 
  

   conglomerate 
  is 
  apparently 
  the 
  near-shore 
  equivalent 
  of 
  the 
  

   Wapanucka, 
  Atoka, 
  and 
  possibly 
  even 
  higher 
  strata 
  as 
  well. 
  It 
  

   overlaps 
  the 
  Caney 
  and 
  is 
  found 
  resting 
  upon 
  the 
  early 
  Paleo- 
  

   zoic 
  strata 
  to 
  the 
  southwest.^ 
  

  

  Traced 
  eastward, 
  the 
  Wapanucka 
  limestone 
  at 
  first 
  thickens 
  

   slightly 
  and 
  then 
  decreases 
  in 
  thickness 
  and 
  comes 
  to 
  an 
  end 
  

   north 
  of 
  the 
  Ouachita 
  Mountains 
  near 
  the 
  Arkansas-Oklahoma 
  

   line. 
  In 
  the 
  Arbuckle 
  region, 
  the 
  Caney 
  is 
  over 
  a 
  thousand 
  

   feet 
  in 
  thickness 
  and 
  overlies 
  the 
  Woodford 
  chert, 
  of 
  probably 
  

   Devonian 
  age. 
  Over 
  a 
  part 
  of 
  the 
  area, 
  however, 
  the 
  Syca- 
  

   more 
  limestone 
  intervenes 
  between 
  the 
  Woodford 
  and 
  the 
  

   Caney 
  and 
  is 
  correlated 
  with 
  an 
  undifferentiated 
  lower 
  division 
  

   of 
  the 
  Caney 
  in 
  other 
  localities. 
  

  

  In 
  the 
  vicinity 
  of 
  the 
  Ouachita 
  Mountains, 
  the 
  succession 
  is 
  

   somewhat 
  different. 
  The 
  Wapanucka 
  limestone 
  disappears 
  in 
  

   southern 
  Oklahoma 
  and 
  the 
  Atoka 
  formation 
  rests 
  directly 
  

   upon 
  the 
  Caney 
  shale, 
  there 
  about 
  800 
  feet 
  thick. 
  The 
  Caney 
  

   overlies 
  with 
  apparent, 
  and 
  probably 
  real, 
  conformity 
  the 
  Jack- 
  

   fork 
  sandstone 
  and 
  Stanley 
  shale, 
  each 
  about 
  5000 
  feet 
  in 
  thick- 
  

   ness^ 
  Farther 
  east, 
  in 
  Arkansas, 
  the 
  Caney 
  also 
  disappears, 
  

   and 
  the 
  Atoka 
  rests 
  upon 
  the 
  Jackfork.| 
  

  

  The 
  Fauna 
  of 
  the 
  Wapanucka 
  limestone. 
  

  

  Through 
  the 
  courtesy 
  of 
  Mr. 
  C. 
  R. 
  Thomas, 
  of 
  the 
  Oklahoma 
  

   Geological 
  Survey, 
  I 
  have 
  been 
  enabled 
  to 
  study 
  a 
  representa- 
  

   tive 
  collection 
  of 
  fossils 
  from 
  the 
  Wapanucka 
  limestone. 
  The 
  

   fossils 
  were 
  obtained 
  at 
  several 
  localities 
  in 
  and 
  near 
  the 
  Atoka 
  

   and 
  Coalgate 
  quadrangles 
  midway 
  between 
  the 
  Arbuckle 
  and 
  

   Ouachita 
  Mountains. 
  

  

  * 
  Collier, 
  A. 
  J., 
  The 
  Arkansas 
  coal 
  field, 
  U. 
  S. 
  Geol. 
  Survey, 
  Bull. 
  326, 
  

   p. 
  12, 
  1907. 
  Snider, 
  L. 
  C, 
  Geology 
  of 
  East 
  Central 
  Oklahoma, 
  Okla. 
  Geol. 
  

   Survey, 
  Bull. 
  17, 
  p. 
  8, 
  1914. 
  

  

  f 
  Wallis, 
  B. 
  F.. 
  Geology 
  and 
  economic 
  value 
  of 
  the 
  Wapanucka 
  limestone 
  

   of 
  Oklahoma, 
  Okla. 
  Geol. 
  Survey, 
  Bull. 
  23, 
  1915. 
  

  

  % 
  Taff 
  , 
  J. 
  A., 
  Geology 
  of 
  the 
  Arbuckle 
  and 
  Wichita 
  Mountains, 
  U. 
  S. 
  

   Geol. 
  Survey, 
  Prof. 
  Paper 
  31, 
  p. 
  34, 
  1904. 
  

  

  §Taff. 
  J. 
  A., 
  Grahamite 
  deposits 
  of 
  southeastern 
  Oklahoma, 
  U. 
  S. 
  Geol. 
  

   Survey, 
  Bull. 
  380, 
  p. 
  289, 
  1910. 
  

  

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

   1909. 
  

  

  

  