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  Bicha?*dson 
  — 
  Paleozoic 
  Section 
  in 
  Northern 
  Utah. 
  

  

  Dr. 
  Girty 
  states 
  that 
  the 
  latter 
  faona 
  is 
  related 
  to 
  that 
  of 
  the 
  

   Moorefield 
  shale 
  of 
  Arkansas, 
  which 
  is 
  of 
  basal 
  upper 
  Missis- 
  

   sippian 
  age. 
  

  

  Pennsylvanian 
  and 
  Permian 
  ? 
  series. 
  

  

  There 
  has 
  been 
  some 
  confusion 
  in 
  the 
  naming 
  of 
  the 
  Penn- 
  

   sylvanian 
  and 
  Permian 
  ? 
  rocks 
  of 
  northern 
  Utah 
  and 
  southern 
  

   Idaho. 
  The 
  40th 
  Parallel 
  Survey 
  introduced 
  the 
  term 
  Weber 
  

   quartzite, 
  taken 
  from 
  a 
  great 
  development 
  of 
  gray 
  quartzite 
  in 
  

   Weber 
  canyon, 
  for 
  the 
  beds 
  lying 
  between 
  what 
  was 
  called 
  

   "Wasatch 
  limestone" 
  and 
  the 
  "Upper 
  Coal 
  Measure 
  lime- 
  

   stone." 
  Since 
  then 
  down 
  to 
  comparatively 
  recently 
  the 
  name 
  

   Weber 
  quartzite, 
  without 
  being 
  clearly 
  defined, 
  has 
  been 
  in 
  

   current 
  usage, 
  but 
  lately 
  somewhat 
  conflicting 
  terms 
  have 
  been 
  

   introduced 
  for 
  wdiat 
  is 
  thought 
  to 
  be 
  in 
  part 
  the 
  equivalent 
  of 
  

   the 
  original 
  Weber, 
  although 
  detailed 
  work 
  has 
  not 
  yet 
  been 
  

   done 
  in 
  the 
  type 
  locality. 
  Boutwell 
  in 
  his 
  report 
  on 
  the 
  Park 
  

   City 
  District 
  included 
  in 
  the 
  Park 
  City 
  formation 
  beds 
  which 
  

   may 
  be 
  the 
  equivalent 
  of 
  the 
  upper 
  part 
  of 
  the 
  original 
  Weber 
  

   quartzite 
  ; 
  and 
  Blackwelder, 
  following 
  Weeks, 
  applied 
  the 
  

   name 
  Morgan 
  formation 
  to 
  a 
  mass 
  of 
  red 
  sandstone 
  and 
  shale 
  

   with 
  intercalated 
  thin 
  limestone 
  that 
  apparently 
  was 
  included 
  

   in 
  the 
  lower 
  part 
  of 
  the 
  original 
  Weber 
  quartzite. 
  Gale 
  and 
  

   Richards, 
  in 
  their 
  Preliminary 
  Report 
  on 
  the 
  Phosphate 
  De- 
  

   posits 
  in 
  Southeastern 
  Idaho 
  and 
  adjacent 
  parts 
  of 
  Wyoming 
  

   and 
  Utah, 
  extended 
  the 
  terms 
  Weber 
  quartzite 
  and 
  Park 
  City 
  

   formation 
  to 
  that 
  region. 
  But 
  as 
  the 
  work 
  in 
  the 
  phosphate 
  

   reserves 
  of 
  southeastern 
  Idaho 
  was 
  extended, 
  the 
  introduction 
  

   of 
  new 
  names 
  became 
  necessary 
  because 
  satisfactory 
  correlation 
  

   with 
  the 
  Weber 
  Canyon 
  section 
  could 
  not 
  be 
  established. 
  

   Accordingly, 
  Richards 
  and 
  Mansfield 
  introduced 
  the 
  names 
  

   Wells 
  and 
  Phosphoria 
  formations 
  defined 
  below. 
  

  

  Wells 
  Formation. 
  

  

  The 
  Wells 
  formation,* 
  named 
  from 
  Wells 
  Canyon 
  in 
  T. 
  10 
  S., 
  

   R. 
  45 
  E., 
  Idaho, 
  includes 
  the 
  beds 
  of 
  Pennsylvanian 
  age 
  lying 
  

   between 
  the 
  Brazer 
  limestone 
  and 
  the 
  overlying 
  Phosphoria 
  

   formation. 
  At 
  the 
  type 
  locality 
  the 
  Wells 
  formation 
  is 
  2400 
  

   feet 
  thick 
  and 
  is 
  divisible 
  into 
  three 
  portions, 
  an 
  upper 
  calca- 
  

   reous 
  sandstone 
  or 
  siliceous 
  limestone 
  series, 
  a 
  middle 
  sandy 
  

   series 
  and 
  a 
  lower 
  sandy 
  and 
  cherty 
  limestone 
  series. 
  In 
  the 
  

   Randolph 
  quadrangle, 
  the 
  Wells 
  formation 
  outcrops 
  in 
  only 
  

   two 
  areas, 
  in 
  the 
  canyon 
  \\ 
  miles 
  east 
  of 
  Laketown 
  and 
  in 
  the 
  

   Crawford 
  Mountains. 
  In 
  the 
  former 
  area, 
  where 
  exposures 
  

  

  * 
  Richards 
  and 
  Mansfield: 
  The 
  Bannock 
  Overthrust, 
  Journal 
  of 
  Geology, 
  

   vol. 
  xx, 
  pp. 
  689-693, 
  1912. 
  

  

  