﻿GEOLOGY. 
  253 
  

  

  not 
  wholly 
  alike 
  in 
  their 
  mineral 
  characters, 
  may, 
  in 
  the 
  

   termination 
  of 
  their 
  course, 
  have 
  thus 
  distributed 
  them. 
  

  

  These 
  palm 
  woods 
  differ 
  both 
  in 
  their 
  specific 
  charac- 
  

   ter 
  and 
  in 
  their 
  forms 
  of 
  silicification. 
  

  

  More 
  than 
  twenty 
  species 
  have 
  been 
  obtained, 
  and 
  

   constitute 
  one 
  of 
  the 
  most 
  novel 
  and 
  interesting 
  features 
  

   in 
  our 
  palasontology. 
  Some 
  of 
  these 
  are 
  beautifully 
  

   agatized, 
  some 
  converted 
  into 
  jet, 
  and 
  others 
  into 
  a 
  fine, 
  

   close-grained, 
  fawn-colored 
  jasper. 
  

  

  Eounded, 
  boulder-like 
  masses 
  of 
  a 
  foot 
  in 
  dimensions, 
  

   and 
  others 
  of 
  less 
  diameter 
  and 
  eighteen 
  inches 
  in 
  

   length, 
  have 
  been 
  obtained. 
  

  

  It 
  is, 
  perhaps, 
  scarcely 
  necessary 
  to 
  add 
  that 
  the 
  drift 
  

   is 
  differently 
  disposed, 
  not 
  merely 
  in 
  beds 
  or 
  depressions, 
  

   but 
  heaped 
  up 
  in 
  elevated 
  knolls 
  or 
  moraine-like 
  ridges 
  

   and 
  positions, 
  attributed 
  by 
  Sir 
  Charles 
  Lyell 
  and 
  other 
  

   eminent 
  geologists, 
  to 
  the 
  lateral 
  pressure 
  of 
  moving 
  ice. 
  

  

  These 
  deposits 
  always 
  occur 
  between 
  the 
  vegetable 
  

   soil 
  and 
  the 
  rocky 
  strata 
  of 
  all 
  ages, 
  that 
  constitute 
  the 
  

   geological 
  basis 
  of 
  each 
  section 
  of 
  country. 
  

  

  To 
  the 
  north 
  of 
  St. 
  Peter's, 
  Nicolet 
  found 
  it 
  overlying 
  

   the 
  primary 
  rocks 
  to 
  the 
  south, 
  and 
  on 
  both 
  sides 
  of 
  the 
  

   Mississippi 
  it 
  covers 
  siluvian 
  rocks. 
  On 
  the 
  upper 
  Mis- 
  

   souri 
  it 
  rests 
  upon 
  a 
  cretaceous 
  formation, 
  and 
  upon 
  the 
  

   tertiary. 
  

  

  SPRINGS 
  AND 
  WELLS. 
  

  

  The 
  section 
  of 
  the 
  State 
  embracing 
  the 
  pine 
  region 
  

   is 
  bountifully 
  supplied 
  with 
  springs 
  of 
  pure 
  freestone 
  

   water; 
  and 
  in 
  the 
  southernmost 
  counties 
  water 
  is 
  also 
  

   obtained 
  in 
  wells 
  of 
  such 
  moderate 
  depth 
  that 
  they 
  are, 
  

   for 
  greater 
  convenience, 
  habitually 
  used. 
  

  

  