﻿10 
  0. 
  Holtedahl 
  — 
  Paleo 
  geography 
  and 
  

  

  that 
  the 
  view 
  which 
  has 
  been 
  so 
  ably 
  advocated 
  by 
  Torne- 
  

   bohm 
  and 
  other 
  prominent 
  Swedish 
  geologists, 
  viz., 
  that, 
  

   as 
  in 
  Scotland, 
  the 
  thick 
  and 
  widespread 
  pressed 
  igneous 
  

   masses 
  lying 
  above 
  undoubted 
  Cambro- 
  Silurian 
  sedi- 
  

   ments 
  along 
  the 
  eastern 
  part 
  of 
  the 
  mountain 
  belt 
  of 
  

   Scandinavia 
  are 
  Archean 
  masses, 
  thrust 
  into 
  their 
  pres- 
  

   ent 
  position 
  from 
  regions 
  far 
  to 
  the 
  northwest, 
  is 
  a 
  view 
  

   that 
  is 
  not 
  shared 
  by 
  any 
  of 
  the 
  Norwegian 
  geologists 
  who 
  

   in 
  more 
  recent 
  times 
  have 
  studied 
  these 
  mountain 
  prob- 
  

  

  Fig. 
  7. 
  

  

  N.W. 
  

  

  Fig. 
  7. 
  — 
  Two 
  highly 
  generalized 
  sections 
  illustrating 
  the 
  wandering 
  of 
  

   the 
  deformative 
  processes 
  in 
  early 
  Silurian 
  time 
  in 
  the 
  region 
  of 
  present 
  

   southern 
  Norway. 
  A 
  third 
  section 
  would 
  show 
  a 
  folding 
  also 
  of 
  the 
  

   Downtonian 
  (and 
  older 
  beds) 
  to 
  the 
  east, 
  this 
  folding 
  gradually 
  dying 
  out 
  

   in 
  that 
  direction. 
  Denudation 
  during 
  the 
  upheavals 
  not 
  taken 
  into 
  con- 
  

   sideration. 
  A, 
  pre 
  -Cambrian, 
  B, 
  Cambro-Silurian 
  marine 
  strata; 
  C, 
  intru- 
  

   sions; 
  D, 
  Downtonian 
  continental 
  strata. 
  

  

  lems. 
  In 
  fact, 
  many 
  Swedish 
  geologists 
  have 
  more 
  re- 
  

   cently 
  also 
  abandoned 
  Tornebohm's 
  theory, 
  at 
  any 
  rate 
  

   in 
  its 
  extreme 
  form. 
  The 
  gneissic 
  masses 
  mentioned 
  are 
  

   in 
  general 
  to 
  be 
  considered 
  as 
  highly 
  pressed 
  younger 
  

   intrusive 
  masses, 
  and 
  of 
  different 
  kinds, 
  which 
  during 
  

   the 
  deformation 
  of 
  the 
  crust 
  broke 
  forth 
  and 
  moved 
  

   under 
  enormous 
  pressure 
  from 
  the 
  central 
  belt 
  outwards 
  

   (see 
  fig. 
  7). 
  In 
  this 
  connection, 
  attention 
  should 
  also 
  be 
  

   directed 
  to 
  the 
  island 
  district 
  of 
  Lofoten 
  in 
  northern 
  

   Norway, 
  which 
  has 
  in 
  recent 
  publications 
  by 
  foreigners 
  

   been 
  pointed 
  out 
  as 
  an 
  Archean 
  area, 
  and 
  corresponding 
  

   to 
  that 
  of 
  the 
  Hebrides, 
  etc., 
  but 
  which 
  must 
  be 
  regarded 
  

   as 
  Caledonian 
  intrusive 
  masses. 
  

  

  The 
  Caledonian 
  intrusions 
  of 
  Spitzbergen 
  have 
  also 
  

   been 
  of 
  gigantic 
  dimensions. 
  Here 
  the 
  northwestern 
  

   corner, 
  previously 
  thought 
  to 
  be 
  an 
  Archean 
  district, 
  

  

  