﻿396 
  Scientific 
  Intelligence. 
  

  

  lower 
  bowlder-clay. 
  Since 
  the 
  bowlder-clay 
  is 
  looked 
  upon 
  as 
  a 
  

   glacial 
  deposit, 
  the 
  Siberian 
  migration 
  reached 
  Central 
  Europe 
  

   after 
  the 
  first 
  portion 
  of 
  the 
  Glacial 
  period 
  had 
  passed. 
  In 
  Eng- 
  

   land 
  it 
  makes 
  its 
  first 
  appearance 
  in 
  the 
  Forest-Bed, 
  which 
  would 
  

   therefore 
  correspond 
  to 
  the 
  'Loess' 
  formation 
  of 
  Central 
  Europe. 
  

   All 
  the 
  other 
  migrations 
  are 
  older 
  than 
  the 
  Siberian. 
  They 
  must 
  

   therefore 
  have 
  come 
  to 
  Great 
  Britain 
  during 
  the 
  earlier 
  part 
  of 
  

   the 
  Glacial 
  period 
  or 
  before 
  it." 
  w. 
  

  

  9. 
  The 
  Geology 
  of 
  the 
  Coolgardie 
  Gold 
  field 
  ; 
  by 
  Torrington 
  

   Blatchford, 
  Assistant 
  Government 
  Geologist. 
  Bulletin 
  No. 
  3, 
  

   Western 
  Australia 
  Geological 
  Survey, 
  A. 
  Gibb 
  Maitland, 
  Govern- 
  

   ment 
  Geologist. 
  Perth, 
  1899. 
  — 
  The 
  Coolgardie 
  gold 
  field 
  is 
  

   remarkable 
  for 
  its 
  rapid 
  development 
  — 
  it 
  was 
  discovered 
  in 
  1892 
  — 
  

   and 
  for 
  the 
  richness 
  of 
  much 
  of 
  the 
  ore. 
  The 
  prevailing 
  rocks 
  

   are 
  designated 
  as 
  diorite 
  with 
  adjacent 
  hornblendic 
  and 
  talcose 
  

   schists, 
  both 
  intersected 
  by 
  numerous 
  acid 
  igneous 
  dikes 
  ; 
  a 
  mass 
  

   of 
  granite 
  is 
  central 
  in 
  the 
  district. 
  Superficial 
  deposits, 
  in 
  part 
  

   " 
  ironstone 
  gravel," 
  cover 
  much 
  of 
  the 
  region. 
  The 
  gold 
  has 
  been 
  

   largely 
  obtained 
  from 
  " 
  gold 
  reefs 
  " 
  intersecting 
  the 
  schists 
  chiefly 
  

   and 
  dipping 
  eastward 
  at 
  an 
  angle 
  of 
  60° 
  to 
  80°. 
  In 
  addition 
  gold 
  

   has 
  been 
  obtained 
  also 
  from 
  lenticular 
  ferruginous 
  patches 
  and 
  

   altered 
  schists 
  adjoining 
  the 
  igneous 
  dikes. 
  The 
  alluvial 
  deposits 
  

   have 
  also 
  yielded 
  much 
  gold. 
  The 
  gold 
  exported 
  in 
  1894 
  

   amounted 
  to 
  105,330 
  oz. 
  and 
  1898 
  to 
  127,227 
  oz. 
  The 
  develop- 
  

   ment 
  of 
  the 
  region 
  is 
  much 
  retarded 
  by 
  the 
  deficient 
  Avater 
  supply. 
  

   The 
  average 
  rainfall 
  for 
  the 
  five 
  years 
  from 
  1894 
  to 
  1898 
  was 
  

   only 
  7*01 
  inches, 
  and 
  artesian 
  wells, 
  though 
  repeatedly 
  tried, 
  have 
  

   not 
  proved 
  successful. 
  

  

  A 
  large 
  colored 
  geological 
  map 
  of 
  the 
  region, 
  on 
  a 
  scale 
  of 
  8 
  

   inches 
  to 
  the 
  mile, 
  has 
  been 
  issued, 
  in 
  addition 
  to 
  the 
  smaller 
  one 
  

   accompanying 
  the 
  report. 
  

  

  10. 
  Mineral 
  Resources 
  of 
  Kansas 
  for 
  1899, 
  by 
  Erasmus 
  

   Haworth. 
  Annual 
  Bulletin 
  of 
  the 
  University 
  Geological 
  Survey 
  

   of 
  Kansas, 
  pp. 
  127, 
  1899, 
  Lawrence, 
  Kansas. 
  — 
  This 
  second 
  annual 
  

   bulletin 
  on 
  the 
  mineral 
  resources 
  of 
  Kansas 
  has 
  recently 
  been 
  

   issued 
  and 
  contains 
  an 
  account 
  of 
  the 
  lead 
  and 
  zinc 
  mining, 
  coal, 
  

   oil, 
  and 
  gas, 
  gypsum, 
  building 
  stone 
  and 
  clays, 
  hydraulic 
  cement, 
  

   and 
  salt. 
  

  

  The 
  salt 
  industry 
  is 
  of 
  especial 
  importance 
  in 
  the 
  State, 
  and 
  the 
  

   account 
  here 
  given 
  of 
  its 
  discovery 
  in 
  1887-88 
  and 
  its 
  rapid 
  devel- 
  

   opment 
  is 
  very 
  interesting. 
  Prof. 
  Haworth, 
  speaking 
  of 
  the 
  geol- 
  

   ogy 
  of 
  the 
  Kansas 
  salts, 
  distinguishes 
  between 
  (1) 
  the 
  salt 
  of 
  salt 
  

   marshes 
  and 
  of 
  salt 
  plains, 
  chiefly 
  in 
  the 
  northern 
  part 
  of 
  the 
  

   State, 
  where 
  the 
  salt 
  has 
  been 
  obtained 
  from 
  the 
  shales 
  of 
  the 
  

   Dakota 
  formation 
  ; 
  and 
  (2) 
  the 
  rock 
  salt 
  of 
  Central 
  Kansas, 
  which 
  

   has 
  been 
  located 
  in 
  "salt 
  shales 
  " 
  of 
  the 
  Permian. 
  The 
  thickness 
  

   of 
  the 
  salt 
  deposits 
  diminishes 
  eastward, 
  though 
  the 
  exact 
  extent 
  

   on 
  the 
  west 
  side 
  of 
  the 
  salt 
  lake 
  from 
  which 
  the 
  material 
  was 
  

   precipitated 
  is 
  as 
  yet 
  unknown. 
  In 
  a 
  north 
  and 
  south 
  direction 
  

   the 
  known 
  salt 
  beds 
  cover 
  a 
  wider 
  area, 
  reaching 
  from 
  Anthony 
  to 
  

  

  