﻿216 
  GEOLOGY. 
  

  

  and 
  Morgan's 
  fork 
  of 
  the 
  Homocliitto. 
  It 
  was 
  here 
  that 
  

   the 
  stone 
  used 
  about 
  the 
  arches 
  and 
  for 
  the 
  lintels 
  of 
  

   the 
  windows 
  in 
  the 
  Catholic 
  church 
  in 
  Natchez 
  was 
  ob- 
  

   tained. 
  

  

  GRAND 
  GIJLF 
  SANDSTONE. 
  

  

  The 
  next 
  and 
  only 
  other 
  point 
  at 
  which 
  the 
  sand- 
  

   stone 
  appears 
  on 
  the 
  banks 
  of 
  the 
  Mississippi, 
  is 
  at 
  

   Grand 
  Gulf 
  in 
  Claiborne 
  County. 
  Here 
  it 
  presents 
  an 
  

   entirely 
  different 
  aspect 
  from 
  that 
  at 
  Fort 
  Adams. 
  

  

  Specimens 
  of 
  this 
  rock, 
  superior 
  in 
  hardness 
  to 
  granite 
  

   itself, 
  have 
  attracted 
  the 
  attention 
  of 
  mineralogists 
  by 
  its 
  

   anomalous 
  character, 
  and 
  resemblance 
  to 
  some 
  of 
  the 
  

   primitive 
  rocks, 
  and 
  the 
  appearance 
  which 
  it 
  sometimes 
  

   presents 
  of 
  having 
  been 
  subjected 
  to 
  igneous 
  action. 
  

  

  It 
  is 
  variable 
  in 
  color 
  and 
  texture, 
  many 
  specimens 
  

   having 
  the 
  appearance 
  of 
  aggregated 
  grains 
  of 
  coarse, 
  

   angular, 
  black 
  and 
  bluish 
  sand 
  incorporated 
  in 
  a 
  matrix 
  

   of 
  a 
  white 
  porcelain 
  or 
  enamel-like 
  character, 
  and 
  ap- 
  

   proaching 
  to 
  a 
  fine 
  brexia 
  in 
  its 
  composition 
  — 
  a 
  quality 
  

   which 
  has 
  occasioned 
  it 
  to 
  be 
  spoken 
  of 
  frequently, 
  in 
  

   common 
  parlance, 
  as 
  petrified 
  rock. 
  

  

  The 
  range 
  of 
  this 
  rock 
  is 
  between 
  the 
  Big 
  Black 
  River 
  

   and 
  the 
  Bayou 
  Pierre 
  (on 
  both 
  sides 
  of 
  the 
  latter 
  in 
  

   some 
  localities), 
  and 
  extending 
  eastwardly 
  to 
  the 
  vicinity 
  

   of 
  Raymond 
  and 
  the 
  Mississippi 
  Springs, 
  near 
  which 
  it 
  

   occurs 
  of 
  a 
  softer 
  and 
  more 
  uniform 
  character 
  or 
  texture, 
  

   and 
  from 
  whence 
  that 
  employed 
  in 
  the 
  basement 
  and 
  

   pavements 
  of 
  the 
  State 
  House 
  at 
  Jackson 
  was 
  obtained. 
  

  

  It 
  is 
  still 
  quarried 
  for 
  building 
  purposes 
  there, 
  and 
  at 
  

   different 
  points 
  in 
  its 
  course. 
  One 
  house 
  has 
  been 
  seen 
  

   built 
  wholly 
  of 
  it, 
  obtained 
  on 
  the 
  Bayou 
  Pierre. 
  

  

  