﻿36 
  Geological 
  Survey 
  of 
  Louisiana 
  [vSect. 
  

  

  from 
  the 
  bottom 
  of 
  the 
  well 
  only. 
  On 
  a 
  trip 
  that 
  I 
  made 
  from 
  

   Baton 
  Rouge 
  to 
  the 
  Arkansas 
  line, 
  I 
  analyzed 
  the 
  water 
  of 
  various 
  

   wells 
  from 
  seventy 
  to 
  one 
  hundred 
  feet 
  in 
  depth, 
  and 
  in 
  not 
  a 
  sin- 
  

   gle 
  instance 
  found 
  any 
  other 
  than 
  the 
  alluvial 
  characteristics." 
  * 
  

  

  He 
  discusses 
  at 
  length 
  the 
  Bluff 
  formation 
  under 
  which 
  he 
  

   includes 
  the 
  Port 
  Hudson, 
  the 
  loess 
  and 
  the 
  Yellow 
  loam 
  and 
  

   gives 
  the 
  results 
  of 
  field 
  work 
  in 
  East 
  Baton 
  Rouge, 
  East 
  and 
  

   West 
  Feliciana, 
  Tensas, 
  Madison, 
  Carroll, 
  Moorehouse, 
  Ouachita, 
  

   Richland, 
  Franklin, 
  Catahoula, 
  Rapides, 
  Avoyelles 
  and 
  Pointe 
  

   Coupe 
  parishes. 
  He 
  describes 
  and 
  gives 
  sections 
  in 
  Bayou 
  

   Macon 
  hills, 
  at 
  Catahoula 
  lake, 
  in 
  the 
  Tunica 
  hills, 
  at 
  St. 
  

   Francisville, 
  at 
  Port 
  Hudson 
  and 
  near 
  Baton 
  Rouge. 
  

  

  In 
  the 
  Tunica 
  hills 
  he 
  records 
  the 
  unusual 
  thickness 
  of 
  150 
  

   feet 
  for 
  the 
  loess 
  and 
  on 
  Red 
  river 
  connects 
  the 
  upland 
  terraces 
  

   with 
  the 
  Port 
  Hudson 
  material 
  of 
  the 
  Mississippi 
  valley. 
  He 
  

   gives 
  an 
  extensive 
  list 
  of 
  Palaeozoic 
  fossils 
  which 
  have 
  been 
  

   identified 
  from 
  the 
  " 
  drift 
  gravels," 
  and 
  is 
  inclined 
  to 
  regard 
  the 
  

   gravels, 
  as 
  having 
  been 
  formed 
  in 
  Quaternary 
  time 
  by 
  an 
  arctic 
  

   current 
  flowing 
  from 
  Hudson 
  bay. 
  

  

  To 
  this 
  discussion 
  is 
  appended 
  a 
  brief 
  account 
  of 
  the 
  forma- 
  

   tions 
  exhibited 
  on 
  the 
  geological 
  map. 
  

  

  Edwards 
  — 
  In 
  1870 
  A. 
  M. 
  Edwards 
  reported 
  on 
  the 
  " 
  Results 
  

   of 
  a 
  Microscopical 
  Examination 
  of 
  Specimens 
  of 
  Sand 
  obtained 
  

   from 
  an 
  Artesian 
  Well 
  at 
  New 
  Orleans." 
  At 
  the 
  depth 
  § 
  of 
  

   32 
  feet 
  he 
  found 
  sand, 
  light 
  grayish 
  with 
  fine 
  specks 
  of 
  organic 
  

   material. 
  This 
  is 
  the 
  gas 
  bearing 
  stratum. 
  At 
  49 
  feet 
  sharp 
  

   sand 
  consisting 
  of 
  clear 
  transparent 
  quartz 
  with 
  black 
  organic 
  

   specks 
  and 
  a 
  few 
  comminuted 
  mollusks. 
  At 
  52^ 
  feet 
  somewhat 
  

   the 
  same 
  as 
  above 
  but 
  darker. 
  At 
  71 
  feet 
  fine 
  sea 
  bottom 
  

   deposits 
  with 
  many 
  sea-shells. 
  The 
  Diaiomacece 
  are 
  the 
  same 
  

   species 
  as 
  those 
  found 
  living 
  on 
  the 
  coast 
  of 
  Florida 
  and 
  

   South 
  Carolina. 
  

  

  Hayes. 
  — 
  An 
  analysis 
  of 
  lignite 
  derived 
  from 
  a 
  locality 
  two 
  

   miles 
  below 
  Shreveport 
  was 
  made 
  in 
  1874 
  bj- 
  S. 
  Dana 
  Hayes, 
  J 
  

  

  * 
  Third 
  Annual 
  Report 
  Geol. 
  Surv. 
  of 
  La., 
  An. 
  Rept. 
  Supl. 
  La. 
  State 
  

   Univ. 
  for 
  1871, 
  p. 
  168, 
  1872. 
  

   § 
  An. 
  Lye 
  Nat 
  Hist 
  New 
  York, 
  vol. 
  9, 
  pp. 
  329-33. 
  

   X 
  Chemical 
  News, 
  vol. 
  30, 
  pp. 
  153-154. 
  

  

  