﻿Geology 
  and 
  Natural 
  History. 
  395 
  

  

  Dawson, 
  Director. 
  Part 
  J, 
  No. 
  670. 
  — 
  The 
  gold-bearing 
  region 
  

   described 
  in 
  this 
  report 
  extends 
  from 
  Memphremagog 
  Lake 
  on 
  

   the 
  west, 
  to 
  the 
  Etchemin 
  River 
  and 
  Township 
  of 
  Ware 
  on 
  the 
  

   northeast, 
  and 
  from 
  the 
  crystalline 
  range 
  of 
  mountains 
  nearest 
  

   the 
  St. 
  Lawrence 
  (the 
  Sutton 
  Mountain 
  anticline) 
  southeastward 
  

   to 
  the 
  International 
  boundary. 
  

  

  The 
  author 
  concludes 
  from 
  his 
  study 
  of 
  the 
  region 
  that 
  the 
  

   " 
  original 
  source 
  of 
  this 
  precious 
  metal 
  was 
  in 
  the 
  oldest 
  rocks 
  of 
  

   the 
  'Eastern 
  Townships,' 
  namely 
  the 
  pre-Cambrian 
  or 
  Huronian 
  (?) 
  

   of 
  the 
  three 
  mountain 
  ranges 
  which 
  traverse 
  it. 
  The 
  Cambrian 
  

   and 
  Cambro-Silurian 
  rocks 
  are 
  probably 
  composed 
  largely 
  of 
  

   materials 
  derived 
  from 
  the 
  pre-Cambrian 
  in 
  their 
  disintegration 
  

   and 
  waste, 
  and 
  the 
  gold 
  they 
  contain, 
  as 
  well 
  as 
  that 
  met 
  with 
  in 
  

   the 
  alluviums 
  derived 
  from 
  them, 
  probably 
  owes 
  its 
  origin 
  like- 
  

   wise 
  to 
  the 
  same 
  source. 
  Concentrating 
  processes 
  have 
  been 
  in 
  

   operation 
  ever 
  since. 
  During 
  the 
  formation 
  of 
  the 
  Cambrian 
  and 
  

   Cambro-Silurian 
  rocks 
  there 
  may 
  have 
  been 
  some 
  mechanical 
  con- 
  

   centration 
  of 
  the 
  gold 
  in 
  these, 
  as 
  the 
  sediments 
  which 
  were 
  

   derived 
  from 
  the 
  pre-Cambrian 
  in 
  Cambrian 
  and 
  Cambro-Silurian 
  

   times 
  would 
  naturally 
  contain 
  it 
  in 
  a 
  fine 
  state 
  of 
  division. 
  It 
  is 
  

   difficult 
  except 
  on 
  this 
  supposition 
  to 
  account 
  for 
  its 
  presence 
  in 
  

   some 
  areas 
  and 
  its 
  scarcity 
  or 
  absence 
  in 
  others. 
  But 
  the 
  chief 
  

   concentration 
  seems 
  to 
  have 
  been 
  in 
  some 
  of 
  the 
  quartz 
  veins 
  at 
  

   a 
  later 
  stage 
  in 
  areas 
  of 
  eruptive 
  diorites 
  and 
  other 
  intrusive 
  rocks, 
  

   and 
  still 
  later 
  in 
  the 
  alluviums 
  of 
  the 
  river-valleys 
  during 
  the 
  

   wear 
  and 
  waste 
  of 
  the 
  land 
  surface." 
  av. 
  

  

  8. 
  The 
  History 
  of 
  the 
  European 
  Fauna, 
  by 
  R. 
  F. 
  Schaeff, 
  pp. 
  

   1-364, 
  1899 
  (The 
  Contemporary 
  Science 
  Series, 
  Walter 
  Scott). 
  — 
  

   This 
  book 
  is 
  a 
  study 
  in 
  the 
  origin 
  and 
  migration 
  of 
  the 
  compo- 
  

   nent 
  elements 
  of 
  a 
  living 
  fauna. 
  The 
  present 
  fauna 
  of 
  Britain 
  

   is 
  recognized 
  as 
  having 
  its 
  origin 
  in 
  migration 
  to 
  the 
  region 
  of 
  an 
  

   Arctic, 
  a 
  Siberian, 
  an 
  Oriental, 
  a 
  Lusitanian 
  (southwest 
  Europe) 
  

   and 
  an 
  Alpine 
  fauna. 
  Regarding 
  the 
  time 
  and 
  order 
  of 
  these 
  

   migrations, 
  the 
  author 
  says, 
  " 
  there 
  is 
  considerable 
  difference 
  of 
  

   opinion 
  on 
  this 
  subject. 
  Some 
  believe 
  that 
  the 
  British 
  fauna 
  is 
  

   altogether 
  post-glacial 
  ; 
  a 
  few 
  think 
  that 
  it 
  is 
  partly 
  so 
  and 
  the 
  

   remainder 
  glacial 
  ; 
  others 
  again 
  hold 
  that 
  a 
  portion 
  is 
  pre-glacial 
  

   and 
  the 
  rest 
  glacial 
  and 
  post-glacial. 
  Those 
  who 
  have 
  studied 
  

   the 
  subject 
  most 
  closely 
  feel 
  convinced 
  that 
  the 
  southwestern 
  or 
  

   Lusitanian 
  fauna, 
  and 
  also 
  the 
  flora, 
  must 
  have 
  arrived 
  before 
  the 
  

   Glacial 
  period 
  and 
  survived 
  the 
  latter 
  in 
  these 
  Islands. 
  It 
  seems 
  

   reasonable 
  to 
  suppose, 
  therefore, 
  that 
  the 
  climate 
  cannot 
  have 
  

   been 
  very 
  severe 
  during 
  the 
  so-called 
  Ice-Age. 
  This 
  Lusitanian 
  

   fauna 
  must 
  be 
  looked 
  upon 
  as 
  the 
  oldest 
  portion 
  of 
  the 
  British 
  

   fauna. 
  The 
  Alpine 
  and 
  Oriental 
  migrations 
  arrived 
  next. 
  After 
  

   these 
  came 
  the 
  Arctic, 
  and 
  finally 
  the 
  Eastern 
  or 
  Siberian. 
  As 
  

   the 
  fossil 
  evidence 
  is 
  most 
  complete 
  with 
  regard 
  to 
  the 
  last, 
  we 
  

   are 
  able 
  to 
  determine 
  with 
  precision 
  not 
  only 
  the 
  direction 
  whence 
  

   this 
  migration 
  came, 
  but 
  approximately 
  its 
  geological 
  age. 
  It 
  

   arrived 
  in 
  Germany 
  from 
  the 
  east 
  after 
  the 
  deposition 
  of 
  the 
  

  

  