﻿66 
  TWENTY-FIRST 
  REPORT 
  ON 
  THE 
  STATE 
  CABINET. 
  

  

  mercury, 
  in 
  the 
  forms 
  of 
  cinnabar 
  and 
  silver-amalgam, 
  are 
  also 
  

   found 
  associated 
  with 
  galena 
  at 
  Sala 
  in 
  Sweden, 
  in 
  crystalline 
  

   limestones, 
  probably 
  Laurentian. 
  The 
  notion 
  that 
  gold 
  belongs 
  

   only 
  to 
  rocks 
  of 
  Lower 
  Silurian 
  age, 
  was 
  many 
  years 
  since 
  dis- 
  

   proved 
  by 
  its 
  discovery 
  in 
  the 
  Upper 
  Silurian 
  slates 
  of 
  Eastern 
  

   Canada, 
  and 
  more 
  recently 
  it 
  has 
  been 
  shown 
  that 
  the 
  great 
  gold 
  

   mines 
  of 
  California 
  are 
  in 
  strata 
  far 
  more 
  recent, 
  and 
  chiefly 
  of 
  

   the 
  Jurassic 
  and 
  Triassic 
  periods. 
  

  

  [Since 
  the 
  writing 
  of 
  this 
  report, 
  native 
  gold 
  has 
  been 
  found 
  in 
  

   the 
  county 
  of 
  Hastings, 
  under 
  several 
  conditions 
  ; 
  first, 
  associated 
  

   with 
  argentiferous 
  fahlerz 
  and 
  with 
  mispickel 
  in 
  small 
  veins 
  of 
  

   bitter-spar, 
  calcite 
  and 
  quartz 
  cutting 
  magnesian 
  limestones, 
  in 
  

   Madoc 
  ; 
  second, 
  in 
  a 
  quartz 
  vein 
  in 
  Marmora 
  ; 
  and 
  thirdly, 
  in 
  

   small 
  irregular 
  veins 
  cutting 
  magnesian 
  limestone, 
  with 
  ferriferous 
  

   bitter-spar, 
  black 
  hornblende, 
  quartz 
  and 
  a 
  black 
  coaly 
  matter, 
  in 
  

   which, 
  as 
  well 
  as 
  in 
  the 
  bitter-spar, 
  the 
  gold 
  is 
  disseminated 
  in 
  

   plates 
  and 
  crystalline 
  scales. 
  This 
  last 
  locality 
  is 
  also 
  in 
  Madoc, 
  

   Ontario. 
  See 
  the 
  Report 
  of 
  T. 
  Sterry 
  Hunt 
  and 
  A. 
  Michel 
  on 
  

   gold 
  in 
  the 
  county 
  of 
  Hastings, 
  1867.] 
  

  

  The 
  existence 
  of 
  the 
  Laurentian 
  system 
  in 
  Bavaria 
  and 
  Bohemia, 
  

   as 
  already 
  stated, 
  has 
  lately 
  been 
  established 
  by 
  Giimbel, 
  both 
  by 
  

   stratigraphical 
  and 
  palaeontological 
  evidence. 
  He 
  finds 
  in 
  Bavaria 
  

   an 
  ancient 
  gneissic 
  series, 
  estimated 
  as 
  not 
  less 
  than 
  90,000 
  feet 
  in 
  

   thickness, 
  and 
  by 
  him 
  divided 
  into 
  a 
  lower 
  portion, 
  chiefly 
  of 
  red 
  

   or 
  variegated 
  gneiss, 
  which 
  he 
  calls 
  the 
  Bojian 
  gneiss, 
  and 
  an 
  

   upper 
  portion, 
  distinguished 
  as 
  the 
  Hercynian 
  gneiss. 
  To 
  this 
  

   succeeds 
  a 
  series 
  consisting 
  chiefly 
  of 
  micaceous 
  schists, 
  with 
  horn- 
  

   blendic 
  and 
  chloritic 
  bands, 
  overlaid 
  by 
  what 
  he 
  calls 
  the 
  Hercy- 
  

   nian 
  clay-slate 
  formation, 
  which 
  immediately 
  underlies 
  the 
  primor- 
  

   dial 
  zone 
  of 
  the 
  Lower 
  Silurian 
  system. 
  The 
  prevailing 
  character 
  

   of 
  the 
  Hercynian 
  gneiss 
  is 
  greyish, 
  /very 
  quartzose, 
  often 
  containing 
  

   black 
  magnesian 
  mica, 
  and 
  frequently 
  having 
  an 
  admixture 
  of 
  oli- 
  

   goclase. 
  Great 
  portions 
  of 
  this 
  gneiss 
  are 
  also 
  marked 
  by 
  the 
  

   presence 
  of 
  iolite 
  or 
  dichroite, 
  giving 
  rise 
  to 
  a 
  distinct 
  variety 
  of 
  

   rock, 
  the 
  so-called 
  iolite-gneiss 
  or 
  dichroite-gneiss. 
  Beds 
  of 
  horn- 
  

   blende 
  slate, 
  diorite 
  and 
  hornblendic 
  gneiss 
  are 
  also 
  abundant 
  in 
  

   this 
  series, 
  particularly 
  in 
  the 
  vicinity 
  of 
  the 
  limestone 
  bands, 
  

   and 
  are 
  often 
  accompanied 
  by 
  beds 
  of 
  metallic 
  sulphurets, 
  and 
  by 
  

   lenticular 
  masses 
  and 
  beds 
  of 
  graphite, 
  which 
  sometimes 
  impreg- 
  

   nates 
  the 
  beds 
  to 
  such 
  an 
  extent 
  as 
  to 
  be 
  wrought 
  with 
  profit. 
  It 
  

   is 
  in 
  these 
  strata 
  that 
  the 
  well-known 
  plumbago 
  deposits 
  of 
  the 
  

  

  