﻿E. 
  B. 
  Branson 
  — 
  Geologic 
  Section 
  in 
  Missouri. 
  271 
  

  

  and 
  ranges 
  from 
  40 
  to 
  70 
  feet 
  thick 
  to 
  the 
  eastern 
  edge 
  of 
  

   the 
  section. 
  It 
  rests 
  nonconf 
  ormably 
  on 
  both 
  St. 
  Peter 
  

   and 
  Jefferson 
  City, 
  bnt 
  mainly 
  on 
  the 
  former. 
  In 
  the 
  

   west 
  it 
  appears 
  at 
  about 
  the 
  same 
  place 
  that 
  the 
  St. 
  Peter 
  

   becomes 
  discontinuous. 
  Imperfect 
  fossils 
  occur 
  in 
  the 
  

   dolomite 
  in 
  a 
  few 
  places 
  but 
  the 
  writer 
  has 
  not 
  found 
  any 
  

   well 
  enough 
  preserved 
  to 
  be 
  identified. 
  

  

  The 
  Kimmswick 
  Limestone 
  (Middle 
  Ordovician). 
  — 
  In 
  

   eastern 
  Callaway 
  County 
  at 
  the 
  place 
  where 
  the 
  St. 
  Peter 
  

   becomes 
  patchy 
  and 
  the 
  Joachim, 
  begins, 
  the 
  Kimmswick 
  

   limestone 
  enters 
  as 
  a 
  thin 
  wedge. 
  It 
  is 
  patchy 
  and 
  

   though 
  it 
  occurs 
  farther 
  north 
  does 
  not 
  occur 
  again 
  in 
  the 
  

   section 
  until 
  15 
  miles 
  farther 
  east. 
  From 
  here 
  it 
  main- 
  

   tains 
  a 
  thickness 
  of 
  40 
  to 
  70 
  feet 
  to 
  the 
  eastern 
  end 
  of 
  the 
  

   section. 
  

  

  The 
  Kimmswick 
  is 
  a 
  limestone 
  of 
  middle 
  Ordovician 
  

   age 
  and 
  is 
  abundantly 
  fossiliferous. 
  It 
  has 
  been 
  divided 
  

   into 
  two 
  distinct 
  formations 
  by 
  Broadhead, 
  and 
  Ulrich 
  

   considers 
  that 
  the 
  bottom 
  in 
  the 
  eastern 
  end 
  of 
  the 
  sec- 
  

   tion 
  is 
  Plattin. 
  The 
  faunas 
  have 
  not 
  been 
  collected 
  and 
  

   studied 
  thoroughly 
  enough 
  to 
  warrant 
  drawing 
  positive 
  

   conclusions, 
  and 
  the 
  writer's 
  study 
  of 
  the 
  rock 
  in 
  the 
  field 
  

   leads 
  him 
  to 
  class 
  all 
  of 
  it 
  as 
  Kimmswick. 
  

  

  Along 
  the 
  line 
  of 
  this 
  section 
  the 
  writer 
  has 
  never 
  

   seen 
  the 
  Kimmswick 
  resting 
  on 
  any 
  formation 
  but 
  the 
  

   Joachim 
  and 
  there 
  is 
  no 
  positive 
  evidence 
  of 
  unconform- 
  

   ity 
  between 
  them. 
  An 
  unconformity 
  is 
  to 
  be 
  expected 
  

   and 
  as 
  the 
  writer 
  has 
  not 
  studied 
  this 
  contact 
  as 
  he 
  has 
  

   most 
  of 
  the 
  others, 
  the 
  evidence 
  may 
  have 
  been 
  over- 
  

   looked. 
  

  

  The 
  Silurian. 
  — 
  The 
  writer 
  has 
  seen 
  no 
  evidence 
  of 
  the 
  

   presence 
  of 
  Silurian 
  rocks 
  in 
  the 
  section. 
  

  

  The 
  Devonian. 
  — 
  Devonian 
  rocks 
  in 
  Missouri 
  are 
  thin 
  

   and 
  patchy, 
  but 
  in 
  this 
  section 
  the 
  Middle 
  Devonian 
  is 
  

   represented 
  by 
  the 
  Cooper 
  limestone 
  and 
  the 
  Mineola 
  

   limestone 
  and 
  the 
  Upper 
  Devonian 
  is 
  represented 
  by 
  the 
  

   Callaway 
  limestone 
  and 
  Snider 
  Creek 
  shale. 
  Their 
  

   maximum 
  thickness 
  in 
  any 
  section 
  is 
  less 
  than 
  100 
  feet. 
  

  

  The 
  Mineola 
  Limestone 
  (Middle 
  Devonian). 
  — 
  Near 
  

   the 
  eastern 
  edge 
  of 
  Callaway 
  County 
  occur 
  the 
  western- 
  

   most 
  outcrops 
  of 
  the 
  Mineola 
  limestone. 
  For 
  40 
  to 
  50 
  

   miles 
  along 
  the 
  section 
  this 
  formation 
  occurs 
  in 
  patches 
  

   and 
  rarely 
  has 
  a 
  thickness 
  of 
  more 
  than 
  10 
  feet 
  though 
  

   southwest 
  of 
  Montgomery 
  City 
  it 
  is 
  40 
  feet 
  thick 
  over 
  an 
  

  

  