﻿SILURIAN 
  EOCKS 
  OF 
  SCANDINAVIA. 
  317 
  

  

  (iv) 
  The 
  occurrence 
  of 
  the 
  Leptaena-limestone 
  above 
  the 
  Eetiolites- 
  

   shales 
  is 
  borne 
  out 
  by 
  its 
  position 
  at 
  Kallholn, 
  where 
  the 
  following 
  

   is 
  the 
  apparent 
  section 
  in 
  ascending 
  order 
  : 
  — 
  

  

  1. 
  Lobiferus-beds, 
  seen 
  in 
  a 
  stream-section. 
  

  

  2. 
  Passage-beds 
  between 
  the 
  Lobiferus-beds 
  and 
  Eetiolites-shales, 
  

   containing 
  an 
  intermixture 
  of 
  the 
  faunas, 
  on 
  the 
  same 
  slabs 
  of 
  stone, 
  

   in 
  a 
  well-section. 
  

  

  3. 
  Eetiolites-beds, 
  in 
  another 
  well-section. 
  

  

  4. 
  Leptaena-limestone 
  in 
  a 
  small 
  quarry 
  on 
  hill-side. 
  

  

  This 
  is 
  the 
  only 
  locality 
  in 
  Dalecarlia 
  where 
  the 
  Lepta3na-lime- 
  

   stone 
  does 
  not 
  show 
  indications 
  of 
  having 
  been 
  disturbed. 
  

  

  Again 
  the 
  grey 
  shaly 
  base 
  of 
  the 
  limestone, 
  as 
  seen 
  at 
  Arfvet 
  and 
  

   Boda, 
  presents 
  just 
  such 
  an 
  appearance 
  as 
  might 
  be 
  expected 
  in 
  

   beds 
  of 
  passage 
  between 
  the 
  Eetiolites-shales 
  and 
  the 
  Leptsena-lime- 
  

   stone 
  itself. 
  

  

  No 
  newer 
  beds 
  of 
  Silurian 
  age 
  are 
  founed 
  in 
  Dalecarlia. 
  

  

  II. 
  Ostrogothia 
  and 
  Westrogothia. 
  — 
  In 
  Ostrogothia 
  the 
  Cambrian 
  

   and 
  Silurian 
  rocks 
  are 
  seen 
  in 
  a 
  few 
  exposures 
  on 
  Lake 
  Wetter 
  and 
  

   along 
  the 
  banks 
  of 
  the 
  Gotha 
  Canal. 
  In 
  Westrogothia 
  they 
  occur 
  

   well 
  exposed 
  along 
  the 
  peculiar 
  terraced 
  hills 
  so 
  characteristic 
  of 
  

   that 
  province, 
  the 
  most 
  celebrated 
  of 
  which 
  is 
  Kinnekulle. 
  This 
  

   region 
  has 
  been 
  admirably 
  described 
  by 
  Dr. 
  Linnarsson 
  in 
  many 
  

   memoirs. 
  As 
  these 
  have 
  made 
  the 
  stratigraphy 
  of 
  this 
  region 
  

   familiar 
  to 
  all 
  students 
  of 
  the 
  lower 
  palaeozoic 
  rocks, 
  it 
  is 
  unnecessary 
  

   to 
  describe 
  the 
  beds 
  in 
  detail, 
  and 
  I 
  shall 
  therefore 
  confine 
  myself 
  to 
  

   observations 
  of 
  the 
  beds 
  at 
  the 
  top 
  of 
  the 
  Cambrian 
  system 
  and 
  the 
  

   base 
  of 
  the 
  Silurian, 
  as 
  a 
  study 
  of 
  these 
  beds 
  throws 
  considerable 
  

   light 
  upon 
  the 
  classification 
  of 
  these 
  deposits. 
  I 
  have 
  studied 
  the 
  

   boundary 
  between 
  the 
  two 
  systems 
  on 
  Lake 
  Wetter 
  at 
  Easnaset, 
  in 
  

   the 
  neighbourhood 
  of 
  ILotala, 
  and 
  near 
  Falkoping, 
  in 
  the 
  hills 
  of 
  

   Mosseberg 
  and 
  Alleberg. 
  In 
  all 
  these 
  localities 
  the 
  top 
  beds 
  of 
  the 
  

   Trinucleus-shales 
  are 
  red 
  shales, 
  often 
  calcareous, 
  as 
  in 
  Dalecarlia. 
  

   At 
  Easnaset 
  these 
  beds 
  are 
  succeeded 
  conformably 
  by 
  green 
  shales 
  

   with 
  thin 
  bands 
  of 
  green 
  nodular 
  gritty 
  limestone, 
  and 
  containing 
  

   fossils, 
  especially 
  Trilobites, 
  such 
  as 
  Calymene, 
  JEncrinurus, 
  and 
  

   Sphcereccochus 
  : 
  these 
  beds 
  are 
  about 
  twenty 
  feet 
  thick. 
  Eesting 
  

   upon 
  them, 
  somewhat 
  irregularly, 
  is 
  a 
  bed 
  of 
  greenish 
  limestone 
  of 
  

   a 
  gritty 
  character, 
  containing 
  much 
  pyrites 
  and 
  oolitic 
  in 
  places 
  ; 
  

   except 
  in 
  colour 
  this 
  bed 
  in 
  every 
  particular 
  resembles 
  the 
  band 
  of 
  

   limestone 
  at 
  Nitsjo, 
  in 
  Dalecarlia, 
  and, 
  like 
  that 
  bed, 
  is 
  immediately 
  

   succeeded 
  by 
  the 
  Lobiferus-shales, 
  which 
  are 
  here 
  of 
  a 
  wafery 
  

   character 
  and 
  crowded 
  with 
  Graptolites. 
  

  

  In 
  the 
  hills 
  near 
  Falkoping 
  the 
  red 
  Trinucleus-shales 
  are 
  succeeded 
  

   by 
  green 
  shales 
  similar 
  to 
  those 
  above 
  the 
  Trinucleus-shales 
  of 
  

   Easnaset. 
  These 
  are 
  overlain 
  conformably 
  by 
  blue 
  flaggy 
  beds 
  of 
  

   considerable 
  thickness, 
  passing 
  into 
  gritty 
  beds 
  at 
  the 
  summit. 
  

   These 
  beds 
  appear 
  to 
  contain 
  few 
  fossils; 
  but 
  I 
  obtained 
  a 
  Trinucleus 
  

   from 
  the 
  grits. 
  Eesting 
  upon 
  this 
  series 
  is 
  a 
  horny 
  grey 
  pyritous 
  

   limestone, 
  succeeded 
  by 
  coral-bearing 
  limestones, 
  and 
  these 
  by 
  cal- 
  

   careous 
  grits, 
  which 
  are 
  very 
  fossiliferous. 
  These 
  latter 
  are 
  the 
  

  

  