﻿Geology. 
  389 
  

  

  world's 
  greatest 
  producers, 
  has 
  been 
  re-examined 
  by 
  Dr. 
  Still- 
  

   well 
  (Bulletins 
  4 
  and 
  8). 
  Evidence 
  has 
  been 
  obtained 
  to 
  show 
  

   that 
  the 
  reefs 
  are 
  younger 
  than 
  the 
  faults 
  and 
  that 
  replacement 
  

   plays 
  a 
  larger 
  part 
  than 
  hitherto 
  assumed. 
  Confirmation 
  is 
  

   given 
  to 
  Taber's 
  theory 
  and 
  experiments 
  (this 
  Journal, 
  Vol. 
  41, 
  

   1916) 
  — 
  that 
  veins 
  may 
  grow 
  in 
  porous 
  rock 
  in 
  the 
  absence 
  of 
  

   pre-existent 
  fissures 
  and 
  then 
  increase 
  in 
  width 
  by 
  pushing 
  apart 
  

   the 
  enclosing 
  walls. 
  h. 
  e. 
  g. 
  

  

  5. 
  The 
  Geolgoical 
  Results 
  of 
  an 
  Expedition 
  to 
  South 
  Austra- 
  

   lian 
  Border, 
  and 
  Some 
  Comparisons 
  between 
  Central 
  and 
  

   Western 
  Australian 
  Geology 
  Suggested 
  Thereby; 
  by 
  H. 
  W. 
  B. 
  

   Talbot 
  and 
  E. 
  deC. 
  Clarke. 
  Jour, 
  and 
  Proe. 
  Royal 
  Society 
  

   of 
  Western 
  Australia, 
  vol. 
  3, 
  1918. 
  Pp. 
  1-29, 
  12 
  figs., 
  3 
  pis.— 
  

   The 
  unusually 
  favorable 
  season 
  of 
  1916 
  permitted 
  a 
  geologic 
  

   traverse 
  by 
  means 
  of 
  camels 
  across 
  the 
  level 
  desert 
  region 
  stretch- 
  

   ing 
  from 
  Laverton, 
  West 
  Australia, 
  to 
  the 
  eastern 
  boundary 
  of 
  

   that 
  State. 
  Observations 
  of 
  geographical 
  features 
  and 
  of 
  man- 
  

   ner 
  of 
  erosion 
  were 
  made 
  and 
  an 
  interesting 
  new 
  formation, 
  the 
  

   Wilkinson 
  Range 
  Series, 
  was 
  studied. 
  The 
  base 
  of 
  this 
  series 
  

   is 
  a 
  bed 
  of 
  flattened, 
  striated 
  boulders 
  with 
  a 
  thickness 
  over 
  wide 
  

   areas 
  of 
  about 
  15 
  feet 
  and 
  included 
  between 
  sediments 
  of 
  shallow 
  

   water 
  origin. 
  The 
  authors 
  ascribe 
  this 
  bed 
  to 
  debris 
  from 
  ice- 
  

   bergs, 
  which 
  implies 
  that 
  in 
  late 
  Mesozoic 
  (Tertiary?) 
  time 
  bergs 
  

   extended 
  to 
  26 
  degrees 
  south 
  latitude. 
  Sediments 
  of 
  Ordovician 
  

   age 
  in 
  the 
  Townsend 
  Range 
  bear 
  such 
  close 
  resemblance 
  to 
  forma- 
  

   tions 
  in 
  West 
  Australia 
  classed 
  as 
  Devonian 
  as 
  to 
  cast 
  doubt 
  on 
  

   previous 
  correlation. 
  Unfortunately 
  the 
  leader 
  of 
  the 
  party, 
  

   Mr. 
  Talbot, 
  and 
  an 
  assistant, 
  Mr. 
  Johnson, 
  were 
  wounded 
  in 
  a 
  

   night 
  attack 
  made 
  by 
  the 
  native 
  blacks, 
  and 
  the 
  expedition 
  was 
  

   forced 
  to 
  return 
  before 
  their 
  program 
  was 
  completed. 
  

  

  H. 
  E. 
  G. 
  

  

  6. 
  The 
  Geology 
  of 
  South 
  Australia; 
  by 
  Walter 
  Howchin. 
  

   Pp. 
  xvi, 
  543 
  ; 
  330 
  figs. 
  Adelaide, 
  1918 
  (Education 
  Department). 
  

   — 
  Australian 
  teachers 
  and 
  students 
  will 
  doubtless 
  welcome 
  

   Howchin 
  's 
  Geology. 
  It 
  present 
  the 
  Australian 
  viewpoint, 
  and 
  

   relieves 
  schools 
  from 
  the 
  necessity 
  of 
  using 
  English 
  and 
  Amer- 
  

   ican 
  texts 
  which 
  are 
  unsuitable 
  for 
  Australian 
  needs. 
  The 
  first 
  

   part 
  of 
  Mr. 
  Howchin 
  's 
  text 
  (pp. 
  1-326) 
  is 
  a 
  treatise 
  on 
  the 
  facts, 
  

   principles, 
  and 
  methods 
  of 
  structural, 
  dynamical, 
  and 
  physio- 
  

   graphic 
  geology 
  after 
  the 
  manner 
  of 
  American 
  books. 
  The 
  dis- 
  

   tinguishing 
  feature 
  is 
  the 
  use 
  made 
  of 
  Australian 
  researches 
  and 
  

   illustrations. 
  The 
  second 
  part 
  of 
  the 
  book 
  (pp. 
  327-515) 
  deals 
  

   with 
  the 
  geology 
  of 
  South 
  Australia 
  with 
  references 
  to 
  the 
  

   geologic 
  features 
  of 
  other 
  states 
  of 
  the 
  Commonwealth. 
  The 
  

   treatment 
  is 
  chronological 
  with 
  chapters 
  on 
  each 
  system. 
  Most 
  

   space 
  is 
  naturally 
  given 
  to 
  those 
  groups 
  of 
  rocks 
  most 
  fully 
  

   developed 
  in 
  South 
  Australia 
  — 
  Cambrian, 
  Permian, 
  Cretaceous, 
  

   and 
  three 
  divisions 
  of 
  the 
  Tertiary. 
  Interesting 
  features 
  to 
  

  

  