﻿86 
  0. 
  Holtedahl 
  — 
  Paleozoic 
  Formations 
  of 
  

  

  still 
  younger 
  formations, 
  while 
  in 
  more 
  recent 
  time 
  these 
  

   "sandstone 
  formations 
  of 
  Finmarken'' 
  have 
  commonly 
  

   been 
  regarded 
  as 
  being 
  older, 
  possibly 
  a 
  northern 
  parallel 
  

   to 
  the 
  arkoses 
  and 
  sandstones 
  of 
  the 
  "Sparagmite 
  divi- 
  

   sion" 
  of 
  southern 
  Norway, 
  a 
  thick 
  series 
  of 
  rock 
  coming, 
  

   in 
  as 
  far 
  as 
  we 
  yet 
  know, 
  conformably 
  below 
  the 
  Lower 
  

   Cambrian 
  Holmia-shale. 
  

  

  A 
  rock 
  of 
  Finmarken 
  that 
  has 
  gained 
  a 
  wide 
  reputation 
  

   is 
  the 
  tillite, 
  found 
  in 
  1890 
  by 
  Reusch 
  at 
  different 
  places 
  

   in 
  the 
  Yarangerf 
  jord. 
  The 
  age 
  of 
  this 
  tillite, 
  found 
  in 
  

   Dahll's 
  Gaisa 
  beds, 
  is 
  generally 
  stated 
  in 
  text-books 
  to 
  

   be 
  Cambrian 
  ; 
  this 
  fixing 
  of 
  the 
  age, 
  however, 
  had 
  no 
  real 
  

   basis 
  since 
  no 
  fossils 
  had 
  been 
  found 
  and 
  the 
  relation 
  of 
  

   the 
  formations 
  to 
  those 
  of 
  the 
  more 
  southern 
  parts 
  of 
  the 
  

   Scandinavian 
  Peninsula 
  were 
  not 
  determined. 
  

  

  During 
  four 
  short 
  summer 
  seasons 
  (1914-1917) 
  the 
  

   writer 
  has 
  worked 
  for 
  the 
  Geological 
  Survey 
  of 
  Norway 
  

   in 
  this 
  northern 
  land 
  and 
  has 
  obtained 
  results 
  that 
  may 
  

   also 
  be 
  of 
  interest 
  to 
  American 
  stratigraphers. 
  1 
  

  

  Table 
  of 
  Finmarken 
  Formations. 
  2 
  

  

  Late 
  Silurian 
  time. 
  

  

  Overthrusted, 
  metamorphosed 
  rocks 
  and 
  intrusive 
  masses 
  

   of 
  the 
  Caledonian 
  deformation. 
  

   Possible 
  late 
  or 
  middle 
  Ordovician 
  time. 
  

  

  Tillite-bearing 
  sandstone 
  series. 
  Bossekop 
  series 
  of 
  the 
  

   Alten 
  district. 
  Thickness 
  200-500 
  meters. 
  The 
  Bossekop 
  

   and 
  Mortensnes 
  tillite 
  has 
  a 
  thickness 
  of 
  about 
  10 
  meters, 
  

   the 
  Bigganjargga 
  tillite 
  of 
  2-3 
  meters. 
  

   Unconformable 
  contact. 
  

   Lower 
  and 
  basal 
  Ordovician 
  time. 
  

  

  Sandstones 
  and 
  shales 
  with 
  dolomites 
  : 
  

  

  Varanger 
  series. 
  Thickness 
  over 
  3000 
  meters. 
  Above 
  

   are 
  impure 
  and 
  interbedded 
  dolomites, 
  grey 
  and 
  red 
  

   sandstones. 
  Then 
  a 
  sandstone 
  succession 
  of 
  about 
  

   2000 
  meters 
  in 
  thickness. 
  Below, 
  dark 
  shales 
  and 
  

   thin-bedded 
  sandstones. 
  The 
  Raipas 
  series 
  of 
  the 
  

   Alten 
  district, 
  containing 
  large 
  masses 
  of 
  lava 
  and 
  

   tuff, 
  is 
  thought 
  to 
  be 
  the 
  equivalent 
  of 
  the 
  Varanger 
  

   series. 
  

  

  1 
  A 
  complete 
  account 
  in 
  the 
  Norwegian 
  language 
  (with 
  a 
  short 
  summary 
  

   in 
  English) 
  has 
  appeared 
  in 
  a 
  paper 
  entitled 
  "Bidrag 
  til 
  Finmarkens 
  

   geologi, 
  " 
  Norges 
  Geologiske 
  Undersokelse, 
  No. 
  84. 
  

  

  to 
  Dahll's 
  terms 
  Uaipas 
  and 
  Gaisa, 
  the 
  former 
  has 
  been 
  retained 
  for 
  

   the 
  volcanic 
  sandstone-shale-dolomite 
  series 
  of 
  the 
  Alten 
  district, 
  while 
  the 
  

   latter 
  could 
  not 
  he 
  maintained 
  as 
  it 
  was 
  found 
  to 
  contain 
  very 
  hetero- 
  

   geneous 
  things. 
  

  

  