﻿Paleozoic 
  formations 
  in 
  Northern 
  Utah. 
  

  

  System. 
  

  

  Carbon- 
  

   iferous 
  

  

  Series 
  or 
  

   fauna. 
  

  

  Permian 
  ? 
  

  

  Pennsylva- 
  

   nian 
  

  

  Mississip- 
  

   pian 
  

  

  Formation. 
  

  

  Phosphoria 
  forma- 
  

   tion 
  

  

  Wells 
  formation 
  

  

  { 
  Brazer 
  limestone 
  

  

  [_ 
  Madison 
  limestone 
  

  

  Approxi- 
  

   mate 
  

   thick- 
  

  

  in 
  feet. 
  General 
  character. 
  

  

  400 
  Chert 
  and 
  siliceous 
  limestone 
  

  

  overlying 
  shale, 
  thin 
  lime- 
  

   stone 
  and 
  oolitic 
  phosphate 
  

   rock. 
  

  

  less 
  than 
  Massive 
  gray 
  quartzite 
  over- 
  

   300 
  to 
  600 
  lain 
  and 
  underlain 
  by 
  thin- 
  

   ner 
  bedded 
  quartzite 
  and 
  

   limestone. 
  

  

  800 
  to 
  Massive 
  to 
  thin-bedded 
  light 
  

   1400 
  gray 
  siliceous 
  limestone 
  and 
  

  

  sandstone. 
  

  

  600 
  to 
  

   1600 
  

  

  Medium 
  to 
  thin-bedded 
  dark 
  

   limestone 
  rich 
  in 
  fossils. 
  

  

  Upper 
  

  

  Devonian 
  \ 
  

  

  Middle 
  and 
  

   Lower 
  

  

  Threeforks 
  lime- 
  

   stone 
  

  

  Jefferson 
  dolomite 
  

  

  Soft 
  reddish 
  rocks 
  poorly 
  ex- 
  

   200 
  posed 
  in 
  Eandolph 
  quad- 
  

  

  rangle. 
  

  

  1200 
  Massive, 
  fine-grained 
  dark 
  dol- 
  

  

  omite, 
  weathers 
  a 
  character- 
  

   istic 
  brown 
  tint. 
  

  

  Silurian 
  

  

  Laketown 
  dolomite 
  1000 
  Massive- 
  light 
  gray 
  dolomite. 
  

  

  f 
  Richmond 
  

   fauna 
  

  

  Fish 
  Haven 
  dolo- 
  

   mite 
  

  

  500 
  

  

  Medium-bedded 
  bluish 
  dolo- 
  

   mite. 
  

  

  Ordo- 
  

   vician 
  

  

  J 
  Chazy 
  ? 
  

   1 
  fauna 
  

  

  Beekman- 
  

   [_ 
  town 
  fauna 
  

  

  f 
  Upper 
  

  

  Cambrian 
  \ 
  Middle 
  

  

  Swan 
  Peak 
  quartz- 
  

   ite 
  

  

  Garden 
  City 
  lime- 
  

   stone 
  

  

  f 
  St. 
  Charles 
  lime- 
  

  

  ! 
  stone 
  

  

  j 
  Worm 
  Creek 
  

  

  [_ 
  quartzite 
  member 
  

  

  f 
  Nounan 
  limestone 
  

  

  Bloomington 
  

   formation 
  

   Hodges 
  shale 
  

   member 
  

  

  Blacksmith 
  lime- 
  

   stone 
  

   Ute 
  limestone 
  

   Spence 
  shale 
  

   member 
  

   [_ 
  Langston 
  limestone 
  

  

  Middle 
  and 
  j 
  Brigham 
  

   Lower 
  { 
  quartzite 
  

  

  Base 
  not 
  exposed 
  

  

  500 
  Fine 
  textured 
  gray 
  quartzite. 
  

  

  Thick- 
  and 
  thin-bedded 
  gray 
  

   1000 
  limestone. 
  

  

  Massive 
  gray 
  limestone 
  with 
  

   1800 
  300 
  ft. 
  of 
  massive 
  gray 
  

  

  to 
  less 
  quartzite 
  at 
  the 
  base, 
  

  

  than 
  500 
  

  

  950 
  Massive 
  to 
  medium-bedded 
  

  

  gray 
  limestone. 
  

  

  Thin-bedded 
  limestone 
  and 
  

   1250 
  shale, 
  Hodges 
  shale 
  member 
  

  

  at 
  the 
  base. 
  

  

  700 
  Massive 
  fine-grained 
  gray 
  to 
  

  

  bluish 
  limestone. 
  

   480 
  to 
  Thin 
  limestone, 
  interbedded 
  

   585 
  with 
  shale. 
  

  

  375 
  Massive 
  crystalline 
  blue 
  to 
  

  

  gray 
  limestone. 
  

  

  1600+ 
  Massive 
  fine-grained 
  gray 
  

   quartzite 
  locally 
  conglom- 
  

   erate. 
  

  

  