﻿Finmarken 
  in 
  Northern 
  Norway. 
  101 
  

  

  Greenland 
  and 
  Spitzbergen. 
  Oolites 
  and 
  intraforma- 
  

   tional 
  conglomerates 
  (the 
  latter 
  in" 
  great 
  thickness) 
  are 
  

   likewise 
  found 
  in 
  the 
  basal 
  Ordovician 
  of 
  Ellesmer 
  eland. 
  

  

  When 
  we 
  furthermore 
  recall 
  that 
  the 
  dolomite-bearing 
  

   sandstones 
  of 
  Finmarken 
  are 
  on 
  the 
  confines 
  of 
  the 
  Arctic 
  

   Ocean 
  and 
  nearest 
  to 
  the 
  American 
  Arctic 
  occurrences, 
  

   the 
  assumption 
  is 
  very 
  probable 
  that 
  all 
  belong 
  to 
  an 
  

   American 
  or 
  Arctic- 
  American 
  fades. 
  Still 
  another 
  

   important 
  fact 
  pointing 
  toward 
  the 
  same 
  conclusion 
  is 
  

   that 
  the 
  only 
  place 
  in 
  northwestern 
  Europe 
  where 
  rocks 
  

   occur 
  showing 
  a 
  likeness 
  to 
  the 
  dolomites 
  of 
  Finmarken 
  

   is 
  in 
  the 
  extreme 
  northwest 
  of 
  Scotland. 
  Here 
  occurs 
  a 
  

   sedimentary 
  series 
  of 
  basal 
  Ordovician 
  age, 
  and, 
  accord- 
  

   ing 
  to 
  the 
  contained 
  fossils, 
  decidedly 
  of 
  the 
  American 
  

   facies. 
  This 
  Durness 
  dolomite 
  is 
  clearly 
  separable 
  from 
  

   the 
  underlying 
  Lower 
  Cambrian 
  sandstones 
  by 
  a 
  marked 
  

   faunal 
  break. 
  An 
  unconformity 
  has 
  also 
  been 
  observed 
  

   by 
  Grabau. 
  19 
  Here 
  again 
  we 
  have 
  a 
  stratigraphic 
  

   sequence 
  identical 
  with 
  that 
  of 
  middle 
  and 
  eastern 
  Fin- 
  

   marken. 
  Not 
  only 
  this, 
  but 
  in 
  the 
  Durness 
  dolomites 
  

   there 
  also 
  occur 
  chert, 
  oolites, 
  and 
  intraformational 
  con- 
  

   glomerates. 
  Certain 
  concretionary 
  structures 
  men- 
  

   tioned 
  20 
  may 
  be 
  of 
  a 
  stromatolitic 
  nature. 
  

  

  A 
  sedimentary 
  series 
  like 
  that 
  of 
  the 
  dolomite-bearing 
  

   sandstone 
  of 
  Finmarken 
  is 
  not 
  known 
  anywhere 
  in 
  

   southern 
  Scandinavia. 
  On 
  the 
  other 
  hand, 
  in 
  the 
  highly 
  

   metamorphic 
  and 
  very 
  thick 
  sedimentary 
  series 
  of 
  the 
  

   western 
  part 
  of 
  northern 
  Scandinavia, 
  thick 
  dolomites 
  

   and 
  limestone 
  are 
  very 
  characteristic, 
  and 
  in 
  this 
  occur- 
  

   rence 
  we 
  have 
  a 
  somewhat 
  similar 
  correspondence. 
  

  

  From 
  the 
  statements 
  just 
  presented, 
  it 
  is 
  seen 
  that 
  

   there 
  are 
  many 
  facts 
  pointing 
  toward 
  the 
  existence 
  of 
  an 
  

   ancient 
  narrow 
  barrier 
  of 
  land 
  crossing 
  the 
  Scandinavian 
  

   peninsula. 
  To 
  the 
  north 
  and 
  northwest 
  of 
  this 
  barrier 
  

   occurs 
  the 
  thick 
  dolomite-bearing 
  series 
  with 
  the 
  Arctic- 
  

   American 
  facies, 
  and 
  on 
  the 
  other 
  or 
  southeastern 
  side 
  

   occur 
  shales 
  and 
  nodular 
  limestones 
  only 
  a 
  few 
  meters 
  

   in 
  thickness, 
  the 
  latter 
  being 
  the 
  Dictyograptus 
  and 
  

   Ceratopyge 
  divisions 
  of 
  southern 
  Scandinavia. 
  This 
  

   postulated 
  barrier 
  (see 
  map, 
  fig. 
  8) 
  is 
  therefore 
  the 
  con- 
  

   tinuation 
  of 
  the 
  one 
  generally 
  assumed 
  to 
  exist 
  between 
  

  

  19 
  Bull. 
  Geol. 
  Soc. 
  America, 
  27, 
  p. 
  563, 
  1916. 
  

  

  20 
  Geological 
  structure 
  of 
  the 
  northwest 
  highlands 
  of 
  Scotland, 
  Mem. 
  Geol. 
  

   Survey 
  Gt. 
  Britain, 
  p. 
  424, 
  1907. 
  

  

  Am. 
  Jour. 
  Sci. 
  -Fourth 
  Series, 
  Vol. 
  XLVIT, 
  No. 
  278.— 
  February, 
  1919. 
  

   8 
  

  

  