﻿114 
  GeoIvOGicai. 
  Survey 
  of 
  Louisiana 
  [Sect. 
  

  

  series 
  of 
  pine 
  flats 
  in 
  Calcasieu 
  parish 
  and 
  the 
  whole 
  prairie 
  

   region 
  of 
  southern 
  Louisiana 
  (see 
  geological 
  map). 
  The 
  post 
  

   oak 
  or 
  upland 
  flats 
  of 
  Red 
  river 
  valley 
  seem 
  to 
  belong 
  to 
  the 
  

   same 
  age 
  also. 
  

  

  The 
  Port 
  Hudson 
  seems 
  to 
  be 
  distributed 
  over 
  the 
  whole 
  lower 
  

   Mississippi 
  vallej^ 
  at 
  a 
  slight 
  depth 
  below 
  the 
  modern 
  river 
  

   deposits. 
  In 
  places 
  through 
  the 
  river 
  valley 
  the 
  Port 
  Hudson 
  

   appears 
  to 
  be 
  represented 
  b}'' 
  butte-like 
  masses 
  which 
  were 
  not 
  

   completel)^ 
  eroded 
  during 
  the 
  degredation 
  period 
  that 
  followed 
  

   their 
  deposition. 
  The 
  Moorehouse 
  hills 
  seem 
  to 
  represent 
  one 
  

   of 
  these 
  erosion-formed 
  masses 
  of 
  Port 
  Hudson 
  material. 
  The 
  

   Bayou 
  Macon 
  hills 
  represent 
  hills 
  of 
  the 
  same 
  type 
  which 
  have 
  

   received 
  a 
  coating 
  of 
  yellow 
  loam. 
  Further 
  down 
  the 
  valley 
  

   another 
  one 
  of 
  these 
  outliers 
  is 
  found 
  in 
  the 
  Avoyelles 
  prairie. 
  

  

  Thickness 
  of 
  the 
  Port 
  Hudson. 
  — 
  The 
  deposition 
  of 
  the 
  Port 
  

   Hudson 
  on 
  the 
  irregular 
  and 
  probably 
  steeply 
  inclined 
  surface 
  of 
  

   the 
  Lafayette 
  gives 
  to 
  the 
  Port 
  Hudson 
  a 
  decidedly 
  varying 
  

   thickness. 
  The 
  wells 
  about 
  Lake 
  Charles 
  seem 
  to 
  indicate 
  for 
  

   the 
  formation 
  an 
  average 
  thickness 
  of 
  a 
  little 
  less 
  than 
  200 
  feet. 
  

   The 
  great 
  thickness, 
  354 
  feet, 
  observed 
  in 
  the 
  Kirkman 
  well 
  near 
  

   Lake 
  Charles 
  appears 
  to 
  be 
  rather 
  abnormal. 
  In 
  the 
  Mississippi 
  

   valley 
  at 
  Lake 
  Providence 
  there 
  are 
  205 
  feet 
  of 
  Port 
  Hudson 
  

   under 
  42 
  feet 
  of 
  recent 
  alluvium.* 
  East 
  of 
  the 
  river 
  the 
  work 
  

   of 
  the 
  Alabama 
  survey 
  has 
  revealed 
  the 
  total 
  thickness 
  of 
  the 
  

   Quaternary 
  to 
  be 
  from 
  200 
  to 
  250 
  feet.f 
  Of 
  this 
  from 
  10 
  to 
  100 
  

   feet 
  is 
  supposed 
  to 
  be 
  recent 
  and 
  the 
  balance 
  Port 
  Hudson 
  

   proper. 
  The 
  New 
  Orleans 
  well 
  had 
  not 
  passed 
  through 
  the 
  

   Quaternary 
  deposits 
  at 
  a 
  depth 
  of 
  630 
  feet. 
  In 
  Red 
  river 
  valley 
  

   in 
  the 
  vicinity 
  of 
  Shreveport 
  the 
  Port 
  Hudson 
  is 
  about 
  100 
  feet 
  

   thick. 
  This 
  would 
  seem 
  to 
  allow 
  for 
  the 
  Port 
  Hudson 
  a 
  river- 
  

   ward 
  development 
  of 
  from 
  100 
  to 
  200 
  feet, 
  a 
  normal 
  coastal 
  

   development 
  of 
  200 
  feet 
  and 
  an 
  extreme 
  development 
  immedi- 
  

   ately 
  on 
  the 
  coast 
  of 
  over 
  600 
  feet. 
  

  

  Fossils. 
  — 
  The 
  most 
  common 
  fossils 
  are 
  plants 
  ; 
  leaves, 
  trunks 
  

   of 
  trees 
  and 
  roots 
  occuring 
  in 
  many 
  parts 
  of 
  the 
  formation. 
  

   Vertebrate 
  remains 
  have 
  been 
  found 
  in 
  numerous 
  parts 
  of 
  the 
  

  

  *Hilgard 
  48th 
  Cong, 
  ist 
  Sess., 
  House 
  Ex. 
  Doc, 
  vol. 
  19, 
  p. 
  493. 
  

   t 
  Geol. 
  vSurv. 
  Aki., 
  1891, 
  p. 
  43. 
  

  

  