﻿11] 
  General 
  Geology 
  : 
  Lafayette 
  ioi 
  

  

  casts, 
  preserving 
  to 
  an 
  extreme 
  degree 
  all 
  the 
  fine 
  surface 
  sculp- 
  

   turing 
  of 
  the 
  shells, 
  from 
  very 
  coarse 
  ferruginous 
  sandstone 
  

   about 
  nine 
  miles 
  west 
  of 
  Ruston. 
  Lerch 
  seems 
  to 
  have 
  made 
  an 
  

   error 
  in 
  his 
  first 
  report* 
  where 
  he 
  refers 
  the 
  red 
  sands 
  

   and 
  sandy 
  clays, 
  which 
  form 
  so 
  large 
  a 
  part 
  of 
  the 
  surface 
  of 
  

   northern 
  Louisiana, 
  to 
  the 
  Ivafa3^ette. 
  Vaughan 
  has 
  shown, 
  and 
  

   the 
  observations 
  of 
  the 
  present 
  survey 
  support 
  his 
  conclusions, 
  

   that 
  the 
  red 
  sands 
  are 
  in 
  part, 
  at 
  least. 
  Lower 
  Claiborne. 
  f 
  

  

  Distribution 
  of 
  the 
  Gravels 
  

  

  The 
  observations 
  in 
  the 
  State 
  have 
  not 
  yet 
  been 
  sufficient 
  to 
  

   show 
  clearly 
  the 
  minor 
  features 
  of 
  the 
  distribution 
  of 
  gravels 
  ; 
  

   but 
  the 
  main 
  localities 
  are 
  known. 
  

  

  East 
  of 
  the 
  Mississippi. 
  — 
  In 
  the 
  hill 
  lands, 
  east 
  of 
  the 
  

   Mississippi 
  river 
  the 
  gravel 
  is 
  very 
  well 
  developed. 
  It 
  there 
  

   overlies 
  the 
  Grand 
  Gulf 
  beds 
  and 
  seems 
  to 
  pass 
  under 
  the 
  Port 
  

   Hudson. 
  Regarding 
  the 
  distribution 
  of 
  the 
  gravel 
  in 
  the 
  

   Florida 
  parishes 
  Hopkins 
  says: 
  In 
  "Washington 
  Parish 
  the 
  

   pebbles 
  are 
  common. 
  About 
  five 
  miles 
  east 
  of 
  the 
  Tangipahoa 
  

   these 
  have 
  disappeared 
  and 
  the 
  deposit 
  is 
  a 
  yellow 
  clay, 
  with 
  

   fragments 
  of 
  brown 
  hematite 
  and 
  red 
  ochre. 
  On 
  Beaver 
  creek, 
  

   and 
  to 
  the 
  west 
  of 
  Tangipahoa, 
  it 
  has 
  changed 
  to 
  a 
  coherent 
  

   sand 
  of 
  an 
  intense 
  red 
  color. 
  Red 
  and 
  yellow 
  clay 
  again, 
  with 
  

   a 
  few 
  quartz 
  pebbles, 
  are 
  seen 
  on 
  the 
  road 
  to 
  Greensburg, 
  and 
  

   red 
  sand 
  at 
  that 
  place. 
  Violet 
  and 
  yellow 
  claj' 
  with 
  a 
  peculiar 
  

   chocolate 
  shale, 
  are 
  found 
  between 
  this 
  point 
  and 
  the 
  Amite 
  

   river. 
  Then 
  the 
  pebbles 
  recommence 
  and 
  are 
  fossiliferous 
  as 
  

   usual. 
  Clinton 
  and 
  Jackson 
  are 
  built 
  upon 
  them. 
  They 
  under- 
  

   lie 
  the 
  bluff 
  to 
  within 
  a 
  mile 
  of 
  the 
  river 
  at 
  Bayou 
  Sara. 
  J 
  The 
  

   southernmost 
  point 
  on 
  the 
  Mississippi 
  at 
  which 
  Lafayette 
  gravels 
  

   have 
  been 
  found 
  is 
  reported 
  by 
  McGee 
  as 
  in 
  a 
  road 
  cut 
  " 
  seven 
  

   or 
  eight 
  miles 
  south-southeast 
  of 
  Bayou 
  Sara, 
  a 
  mile 
  west 
  of 
  

   Thompson's 
  bayou, 
  and 
  midway 
  between 
  Fairview 
  and 
  Star 
  

   Hill 
  plantation. 
  § 
  

  

  *Bun. 
  La. 
  State 
  Expt. 
  Stations 
  : 
  GeoL 
  and 
  Agr. 
  part 
  I, 
  pp. 
  24-26, 
  1892. 
  

   t 
  BulL 
  U. 
  S. 
  GeoL 
  Surv. 
  No. 
  142, 
  1S96, 
  pp. 
  20-22, 
  1896. 
  

   :}: 
  Second 
  Annual 
  Report 
  GeoL 
  Surv., 
  La., 
  1871, 
  p. 
  22. 
  

   \ 
  Twelfth 
  Annual 
  Report 
  U. 
  S. 
  GeoL 
  Surv. 
  p. 
  430. 
  

  

  