﻿272 
  E. 
  B. 
  Branson 
  — 
  Geologic 
  Section 
  in 
  Missouri. 
  

  

  area 
  of 
  a 
  few 
  acres. 
  It 
  is 
  extremely 
  irregular 
  in 
  com- 
  

   position, 
  ranging 
  from 
  limestone 
  of 
  nigh 
  purity 
  to 
  sand- 
  

   stone, 
  though 
  the 
  commonest 
  phase 
  is 
  a 
  porous, 
  sandy 
  

   limestone. 
  In 
  many 
  places 
  it 
  is 
  highly 
  fossiliferous, 
  and 
  

   the 
  faunas 
  are 
  closely 
  related 
  to 
  those 
  of 
  the 
  Onondaga 
  

   of 
  Indiana 
  and 
  Ohio, 
  though 
  not 
  to 
  the 
  Grand 
  Tower 
  of 
  

   southeastern 
  Missouri. 
  It 
  was 
  deposited 
  on 
  an 
  erosion 
  

   surface 
  of 
  low 
  relief 
  and 
  rests 
  on 
  various 
  formations. 
  

   Most 
  commonly 
  it 
  lies 
  disconformably 
  on 
  Kimmswick 
  or 
  

   Joachim, 
  but 
  in 
  some 
  places 
  it 
  lies 
  on 
  St. 
  Peter 
  and 
  Jef- 
  

   ferson 
  City. 
  It 
  seems 
  to 
  have 
  formed 
  in 
  a 
  narrow 
  bay 
  

   extending 
  westward 
  from 
  Indiana. 
  

  

  The 
  Cooper 
  Limestone 
  (Middle 
  Devonian). 
  — 
  The 
  

   Cooper 
  limestone, 
  which 
  was 
  forming 
  at 
  the 
  same 
  time 
  

   as 
  the 
  Mineola, 
  extends 
  westward 
  from 
  western 
  Boone 
  

   County 
  and 
  a 
  barrier 
  less 
  than 
  20 
  miles 
  in 
  width 
  sepa- 
  

   rated 
  the 
  Cooper 
  and 
  Mineola 
  seas. 
  The 
  formation 
  is 
  

   a 
  very 
  compact, 
  fine-grained 
  limestone, 
  which 
  ranges 
  up 
  

   to 
  30 
  feet 
  in 
  thickness 
  though 
  its 
  average 
  thickness 
  is 
  

   less 
  than 
  15 
  feet. 
  Like 
  the 
  Mineola 
  it 
  is 
  not 
  continuous 
  

   but 
  occurs 
  in 
  patches. 
  It 
  outcrops 
  as 
  far 
  west 
  as 
  central 
  

   Pettis 
  County 
  where 
  it 
  dips 
  under 
  westward. 
  It 
  rests 
  

   nonconformably 
  on 
  Jefferson 
  City 
  dolomite 
  in 
  most 
  

   places, 
  but 
  in 
  a 
  few 
  places 
  on 
  St. 
  Peter 
  sandstone. 
  The 
  

   Kimmswick 
  and 
  Joachim 
  do 
  not 
  extend 
  into 
  its 
  territory 
  

   and 
  the 
  St. 
  Peter 
  occurs 
  there 
  only 
  in 
  patches. 
  It 
  is 
  

   usually 
  nonfossiliferous, 
  but 
  in 
  some 
  places 
  bears 
  a 
  

   fauna 
  of 
  a 
  few 
  species 
  most 
  of 
  which 
  are 
  related 
  to 
  those 
  

   of 
  the 
  lowest 
  Devonian 
  in 
  Iowa. 
  The 
  lithologic 
  charac- 
  

   teristics 
  of 
  the 
  Cooper 
  have 
  led 
  to 
  its 
  identification 
  as 
  

   Louisiana 
  limestone, 
  though 
  its 
  position 
  in 
  the 
  geologic 
  

   column 
  and 
  its 
  fauna 
  place 
  it 
  far 
  below 
  that 
  formation. 
  

  

  The 
  Callaway 
  Limestone 
  (Upper 
  Devonian). 
  — 
  From 
  

   the 
  Missouri 
  River 
  on 
  the 
  west 
  to 
  central 
  Warren 
  Countv 
  

   in 
  the 
  east, 
  a 
  distance 
  of 
  about 
  90 
  miles, 
  the 
  Callawav 
  

   limestone, 
  of 
  the 
  upper 
  Devonian, 
  succeeds 
  the 
  Mineola 
  

   and 
  Cooper. 
  Though 
  it 
  becomes 
  patchy 
  on 
  the 
  east 
  and 
  

   west, 
  it 
  is 
  almost 
  continuous 
  for 
  the" 
  entire 
  distance. 
  

   Where 
  best 
  developed, 
  in 
  Callaway 
  County, 
  it 
  is 
  com- 
  

   monly 
  50 
  feet 
  thick, 
  but 
  near 
  the 
  eastern 
  edge 
  it 
  is 
  rarelv 
  

   more 
  than 
  20 
  feet 
  thick 
  and 
  the 
  same 
  is 
  true 
  for 
  the 
  west- 
  

   ern 
  30 
  miles 
  of 
  its 
  extent. 
  The 
  Callaway 
  is 
  extremely 
  

   limited 
  in 
  its 
  north-south 
  extent, 
  not 
  having 
  been 
  ob- 
  

   served 
  beyond 
  one 
  tier 
  of 
  counties, 
  save 
  for 
  a 
  few 
  patches 
  

  

  