﻿Jour 
  Sci.. 
  Vol. 
  XLIII. 
  January, 
  1917 
  Pla 
  

   LaWSOn'-S 
  CORRELATION 
  OP 
  THE'.PRE-CAMBRIAN 
  ON 
  THE 
  BASIS 
  OP 
  TWO 
  AND 
  ONLY 
  TWO 
  GRANITIC 
  INVASIONS 
  mdAei 
  "to 
  sKowiJve 
  It/tk 
  o"o 
  <J 
  Ic 
  corr-etd 
  ho 
  n 
  

  

  c 
  

  

  (1 
  

  

  i 
  

  

  - 
  

   u 
  

  

  :-: 
  

  

  o 
  

  

  ll 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  MOUTH 
  WEST 
  Or 
  LAKE 
  SUPERIOR 
  

  

  SOUTH 
  OF 
  LAKE 
  SUPERIOR 
  

  

  NORTH 
  OF 
  LAKE 
  HURON 
  

  

  BOI 
  I'm 
  '.hi.' 
  ■■ 
  1 
  

  

  fenr/h. 
  

  

  n 
  

  

  fiTIKPHOt'lt 
  UKI 
  

  

  T„«K«, 
  Da, 
  

  

  IV 
  

   GVH 
  FLINT 
  Lake 
  

  

  v.,„„.y 
  , 
  . 
  

  

  M,"., 
  

  

  0oo",„ 
  

  

  taiua. 
  

  

  ».,",«.. 
  

  

  X 
  

  

  XI 
  

  

  J."., 
  

  

  Bill 
  

  

  

  XV 
  

  

  P- 
  

  

  (Epoch, 
  Sorlor.) 
  , 
  

  

  M.l 
  , 
  . 
  

  

  

  I,..,™,,,,.:.,! 
  

  

  Koweenawan 
  

  

  

  Kcivccnannn 
  

  

  Kcwee.awa. 
  

  

  ArecL 
  6aK</ 
  a^i 
  uofeaKi'c 
  -for^atiou 
  

  

  Dykes 
  

  

  1 
  1 
  .I 
  Laccolith 
  

  

  8. 
  Ill 
  

  

  

  

  

  ASIMIHIAN 
  

  

  (Epoch, 
  Serins) 
  

  

  QMe^s 
  co 
  

  

  ■reSaCxort 
  

  

  Alliiinki.ui 
  

   Slates, 
  iron 
  formation. 
  

  

  Animikiaii 
  

   Rove 
  slalc, 
  ixta 
  

   formation 
  

  

  late, 
  iron 
  

  

  Animikian 
  

   Virginia 
  slalc, 
  Bir.nl. 
  ik 
  I. 
  V 
  

   Pokegame 
  quart/Ho 
  

  

  Copps 
  Formation 
  

   Slate, 
  graywacke, 
  

   chert, 
  conglomerate 
  

  

  MKhig.mrae.Ute 
  

  

  

  Volcanic-*, 
  Michigammo 
  

   late, 
  ':111V. 
  r. 
  F., 
  

   Goodrich 
  quartzite 
  

  

  ■ 
  

  

  

  

  rate 
  or 
  

  

  tiMte. 
  

  

  

  ,,.,, 
  

  

  iiean 
  imniL 
  

  

  ■i'".'<" 
  <"«--<■ 
  ■'-/ 
  

  

  Uajoi 
  urn 
  tmfomity 
  

  

  lormity 
  

  

  Major 
  unco 
  ■ 
  ■ 
  

  

  ■»".»"»■- 
  

  

  informity 
  

  

  Major 
  unconformity 
  

  

  Unconformity 
  

  

  

  Unconformity 
  

  

  Major** 
  

  

  ••■•■>)■" 
  fomttu 
  

  

  

  

  

  H 
  

   1 
  

  

  A 
  '' 
  -'•'»'"■""-• 
  

  

  Granite, 
  syenite, 
  i 
  ic 
  

  

  •"*•■* 
  

  

  Oraalte 
  

  

  (Nan. 
  

  

  Granite 
  (Ginnl 
  

  

  Granite 
  (Giants 
  Range) 
  

  

  Granite 
  (Fresque 
  1 
  Ii 
  | 
  

  

  

  Granite 
  

  

  

  Oranlto 
  (KiILrooy) 
  

  

  Oranlto 
  gneiss 
  

  

  Granite 
  (Lorrniti) 
  

  

  Oranlto 
  (Molra) 
  

  

  Ornniiu 
  (Pteton) 
  

  

  

  

  N 
  

   o 
  

  

  ? 
  

  

  it 
  

  

  (] 
  pi 
  ch, 
  Sorli 
  ) 
  

  

  Seine 
  Scries 
  

  

  SlfttB, 
  'jii 
  lit 
  it.-, 
  

  

  ■ 
  ongli 
  te 
  

  

  ■ 
  

   Slate, 
  qunrl 
  |tt>, 
  i 
  m 
  1 
  ■■ 
  1 
  . 
  

  

  injti 
  foi 
  in.it 
  lot 
  

  

  

  Gray 
  week 
  a 
  

  

  ki.ilV 
  1 
  ill 
  , 
  l.il, 
  

   At.iv.a 
  L_P., 
  

  

  1:! 
  ■ 
  1 
  ..ll'IOIll.Tlll,. 
  

  

  Slate, 
  graywacke, 
  

  

  Tyler 
  slate, 
  volcanic., 
  

   WwooJ 
  I. 
  F„ 
  Pnlms 
  

  

  Paint 
  slule, 
  lava., 
  llautiury 
  

   slate, 
  Vulca 
  I. 
  P.. 
  Ajibik 
  

   . 
  quartzite, 
  Hemlock, 
  vulianka 
  

  

  Quionescc 
  schist, 
  Himbury 
  1 
  

   Slate, 
  Vulcan 
  1. 
  F., 
  

   quartzite 
  

  

  i 
  •■;, 
  Biamo 
  

   ■late, 
  Ajibik 
  quartr.ito 
  

  

  T. 
  ml 
  1 
  

  

  ■ 
  

  

  Trmhknmian 
  

  

  Hutlngf 
  

  

  

  

  Major 
  unconformity 
  

  

  E7neon/ormi(jf 
  

  

  

  

  

  

  Unconformity 
  

  

  Unconformity 
  

  

  f/r-fon/ermify 
  

  

  Unconformity 
  

  

  IVncon/ormiry 
  

  

  

  

  

  

  

  

  (Epoch, 
  Borles) 
  

  

  St.-.-j.ro.'lt 
  Series 
  

  

  Voteanies, 
  limeat.me 
  (foMil^), 
  

   quartzite, 
  conglomerate 
  

  

  E<xrt>\ 
  

  

  Major 
  unconformity 
  

  

  Major 
  unconformity 
  

  

  tfajsf 
  „,i,-,„i/ormii„ 
  

  

  on/ormtly 
  

  

  Bail 
  Rivet 
  limestone, 
  

   Sunday 
  quarlzita 
  

  

  Randvillo 
  dolomite. 
  

   Sturgeon 
  quartzite 
  

  

  Qilarlilte 
  ' 
  

  

  Rand 
  vi 
  He 
  dolomite. 
  

   Sturgeon 
  quartz. 
  to 
  

  

  1 
  

   Kona 
  dylomitc. 
  

   M.-Miard 
  quartzite 
  

  

  KrucoKcnes 
  

  

  Quartette, 
  limewtono. 
  

   graywncko, 
  limmtooo, 
  

   conglomerate, 
  qiloTllil* 
  

  

  fomttj 
  

  

  

  bfn/oi 
  1 
  Ij 
  

  

  

  

  EPIZ.AUBENTIAN 
  INTERVAL 
  

  

  A/rtjortim-on/orrmfy 
  

  

  Major 
  unconformity 
  

  

  Major 
  unconformity 
  

  

  Major 
  unconformity 
  

  

  if 
  ti>or 
  unconformity 
  

  

  A./aj'orunCOn/ormi(y 
  

  

  onformtty 
  

  

  

  Laobimuan. 
  Revou 
  no 
  

  

  Granite 
  guclss 
  

  

  Oranitognouo, 
  

  

  Gri.ullc 
  gneiss 
  

  

  Granite 
  gnclsa 
  

  

  Otanlt. 
  gnerss 
  

  

  Granite 
  

  

  Granite 
  gneiss 
  

  

  Granite 
  gneiss 
  

  

  Granite 
  gneiss 
  

  

  Granite 
  gneb. 
  

  

  Oranlto 
  gneiss 
  

  

  Oranitot 
  

  

  Granite 
  gnelao 
  

  

  Oranlto 
  gnelsa 
  

  

  Oranlto 
  gnelu 
  

  

  

  3 
  S. 
  

  

  1™ 
  

  

  ° 
  1 
  

  

  Gbshvilli 
  

   (Epoch, 
  Boric.) 
  

  

  

  

  

  

  

  

  

  

  

  

  

  fvmesCc 
  

  

  rte. 
  rn«t5tvi. 
  

  

  ' 
  

  

  U 
  ran 
  v 
  I 
  Ho 
  

  

  

  

  

  u 
  

  

  KtlWATIX 
  

  

  (Epoch, 
  Series) 
  

  

  Koewntin 
  

  

  Ke< 
  ...niii 
  

  

  I-.-.,. 
  ,1 
  ,, 
  

  

  . 
  , 
  . 
  , 
  

  

  

  Keewatin 
  

  

  Keewatin 
  

  

  Green 
  itor.e 
  

  

  S 
  this 
  ft- 
  _ 
  

  

  hVewatin 
  1 
  Ki 
  ■■ 
  itlB 
  

  

  Keewatin 
  

  

  Kvonatin 
  

  

  Keewatin 
  

  

  

  N 
  

  

  < 
  

  

  CouTcuicniNa 
  

  

  ( 
  I 
  ! 
  Ii, 
  Scrips) 
  

  

  Coutchiching 
  

  

  

  

  

  

  

  no 
  otwL^oI 
  Y<i<i~r* 
  rTnauon5 
  » 
  ,,ur 
  -a 
  

  

  

  1 
  

  

  

  

  

  

  .I.1.111- 
  i.r 
  Amei'ioan 
  boology, 
  p 
  68) 
  tab 
  ■ 
  i 
  

  

  Algoumn 
  granites 
  in 
  the 
  Bequenoeof 
  formationi 
  ion 
  tin 
  i 
  run 
  

  

  i 
  mo 
  nii'l 
  in. 
  i 
  mil.. 
  is 
  ..I 
  the 
  Btratigrnphio 
  succession 
  

  

  r, 
  thai 
  the 
  sequence 
  i-- 
  •■liri.tuiln^u-il 
  ;n 
  wi-ll 
  a* 
  Btratigivi])li 
  

  

  the 
  si 
  iinl.n.i 
  sc 
  we 
  neetl 
  a 
  term 
  {or 
  these 
  two 
  periods 
  of 
  batholithii 
  rlevelopment. 
  

  

  Perhaps 
  the 
  terms 
  Uuxentian 
  Bevolution 
  and 
  Algoman 
  Revolntion 
  need 
  in 
  tlie 
  tabu- 
  

   iiiiuii 
  will 
  meet 
  the 
  objection. 
  

  

  Authorities 
  for 
  the 
  sequence 
  shown 
  in 
  each 
  "f 
  the 
  columns 
  of 
  ilie 
  tabu- 
  

   lation 
  : 
  

  

  I 
  and 
  II.— 
  Lawson, 
  Qeol 
  n 
  . 
  I 
  inada, 
  Mem. 
  88, 
  1912; 
  Mem. 
  40, 
  1913; 
  

   Cong. 
  gobl. 
  internet. 
  XII. 
  1913, 
  

  

  ill 
  -Smith, 
  Ont. 
  Bar. 
  Mines, 
  14, 
  1. 
  1905. 
  Silver, 
  Out. 
  Bur. 
  Jline3, 
  15, 
  1, 
  1906. 
  

   I-,. 
  .,,n 
  i 
  Ion 
  ■ 
  il. 
  ini 
  mat. 
  XII. 
  Guide 
  Book 
  8, 
  I. 
  mi- 
  

  

  ni, 
  IV, 
  V, 
  VI, 
  VII, 
  X.— 
  Van 
  Hiseand 
  L.itli, 
  U, 
  s. 
  il 
  s. 
  Mon. 
  52, 
  1011, 
  

  

  VII, 
  VIII, 
  X.— 
  Allen 
  and 
  Barrett, 
  Joarn. 
  Geol., 
  v„l, 
  88, 
  1915. 
  

  

  XI, 
  XII. 
  XIII.— 
  Collins, 
  Geol. 
  Survey 
  of 
  Canada, 
  MtiB.Bull.no. 
  8, 
  1914, 
  1916 
  

  

  XIV.— 
  Miller 
  and 
  Knight, 
  Ont. 
  Bur. 
  Minea, 
  22 
  ' 
  1914 
  

  

  XV.— 
  CuBhing, 
  thia 
  Journal, 
  rol 
  d 
  191 
  

  

  i 
  ml 
  ■ 
  ., 
  

  

  