﻿202 
  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  [Mar. 
  9, 
  

  

  Cap 
  la 
  Heve 
  *, 
  near 
  Havre, 
  exhibits 
  Upper 
  Tertiary 
  strata 
  lying 
  

   horizontally 
  and 
  conformably 
  on 
  abraded 
  Lower 
  Greensand. 
  M. 
  Elie 
  

   de 
  Beaumont 
  gives 
  an 
  instructive 
  example 
  of 
  Miocene 
  beds 
  at 
  Clainf, 
  

   covering 
  an 
  ancient 
  gneiss 
  ; 
  but 
  a 
  few 
  hundred 
  yards 
  off 
  also 
  incum- 
  

   bent 
  on 
  Lias 
  and 
  other 
  Lower 
  Secondary 
  rocks, 
  the 
  gaps 
  therefore 
  

   being 
  numerous. 
  Messrs. 
  de 
  Beaumont 
  and 
  Dufrenoy 
  also 
  give 
  us 
  in 
  

   the 
  section 
  below 
  a 
  most 
  interesting 
  series 
  of 
  blanks 
  or 
  absences, 
  as 
  

   will 
  be 
  understood 
  without 
  explanation 
  $. 
  Dr. 
  VonDechen 
  § 
  describes 
  

   the 
  Miocene 
  lignite-beds 
  of 
  the 
  Siebengebirge 
  as 
  reposing 
  on 
  Upper 
  

   Devonian 
  rocks 
  ; 
  and 
  thus 
  exhibiting 
  an 
  interval 
  of 
  fifteen 
  of 
  D'Or- 
  

   bigny's 
  stages 
  ; 
  in 
  this 
  case, 
  probably, 
  through 
  denudation. 
  

  

  Fig. 
  3. 
  — 
  Section 
  from 
  Dove 
  to 
  Puy-Notre-Dame 
  (after 
  Dufrenoy 
  and 
  

  

  De 
  Beaumont). 
  

  

  Dov<S. 
  

  

  1 
  °^ 
  . 
  Puy-Notre-Dame. 
  

  

  Mounds 
  of 
  ddbris. 
  

  

  a. 
  Miocene. 
  e. 
  Micaceous 
  and 
  talcose 
  schist. 
  

  

  CT. 
  Tufaceous 
  Chalk. 
  A. 
  Devonian. 
  

  

  C. 
  Greensand. 
  D. 
  Diorite. 
  

   CV. 
  Lower 
  Greensand. 
  q. 
  Vein 
  of 
  black 
  quartz. 
  

  

  d. 
  Jurassic. 
  

  

  M. 
  d'Orbigny|| 
  gives 
  several 
  instances 
  of 
  great 
  blanks 
  beneath 
  the 
  

   Miocene 
  stage, 
  as 
  in 
  the 
  Department 
  of 
  La 
  Manche, 
  where 
  the 
  latter 
  

   rests 
  on 
  Trias 
  ; 
  there 
  being 
  in 
  that 
  district 
  a 
  void 
  of 
  twenty-five 
  of 
  

   his 
  stages. 
  In 
  the 
  Ligurian 
  basin 
  this 
  author 
  says 
  that 
  patches 
  of 
  

   the 
  Faluns 
  lie 
  directly 
  on 
  Azoic 
  or 
  Plutonic 
  rocks, 
  with 
  the 
  loss 
  of 
  

   twenty-five 
  stages. 
  At 
  Gahard 
  they 
  cover 
  Palaeozoic 
  strata, 
  twenty- 
  

   two 
  stages 
  being 
  absent 
  ; 
  and 
  at 
  Tournay 
  (Deux 
  Sevres), 
  &c, 
  they 
  

   overlie 
  Chalk, 
  four 
  stages 
  being 
  missing. 
  

  

  M. 
  d'Archiac 
  % 
  quotes 
  M. 
  Ribiero 
  as 
  stating 
  that, 
  four 
  miles 
  north 
  

   of 
  Thomar 
  in 
  Portugal, 
  lacustrine 
  limestones 
  of 
  the 
  Miocene 
  age 
  are 
  

   underlain 
  by 
  Upper 
  Lias 
  and 
  Trias. 
  At 
  the 
  foot 
  of 
  the 
  Sierra 
  Morena, 
  

   near 
  Cordova, 
  and 
  over 
  extensive 
  districts, 
  Miocene 
  is 
  incumbent 
  

   horizontally 
  on 
  inclined 
  Carboniferous 
  strata. 
  It 
  was 
  first 
  seen 
  by 
  the 
  

   late 
  Mr. 
  S. 
  Peace 
  Pratt 
  **. 
  A 
  remarkable 
  series 
  of 
  gaps, 
  indicated 
  by 
  

   the 
  absence 
  of 
  Chalk, 
  Oolite, 
  Permian, 
  Devonian, 
  &c, 
  is 
  described 
  by 
  

   Prof. 
  Peters 
  ft 
  as 
  occurring 
  near 
  Bleiberg. 
  The 
  section 
  begins 
  with 
  

  

  * 
  Dufrenoy 
  and 
  De 
  Beaumont, 
  ' 
  Explication 
  de 
  la 
  Carte 
  Geol. 
  de 
  France,' 
  

   vol. 
  ii. 
  p. 
  198. 
  

  

  t 
  Ibid. 
  vol. 
  ii. 
  pp. 
  124, 
  125. 
  

  

  t 
  As 
  all 
  the 
  Sections 
  are 
  self-explanatory, 
  each 
  will 
  be 
  found 
  at 
  the 
  head 
  of 
  the 
  

   period 
  to 
  which 
  it 
  refers, 
  without 
  any 
  further 
  notice. 
  

  

  § 
  Bull. 
  Soc. 
  Geol. 
  de 
  France, 
  2 
  e 
  serie, 
  vol. 
  x. 
  p. 
  319. 
  

  

  || 
  Cours 
  de 
  Paleontologie, 
  vol. 
  ii. 
  p. 
  768. 
  

  

  ■jf 
  Histoire 
  des 
  Progres 
  de 
  la 
  Geologie, 
  vol. 
  vii. 
  p. 
  217. 
  

  

  ** 
  D'Archiac, 
  ' 
  Histoire 
  des 
  Progres,' 
  vol. 
  iii. 
  p. 
  9. 
  

  

  ■ft 
  " 
  DieUmgebung 
  von 
  Bleiberg," 
  Jahrbuch 
  der 
  k. 
  k. 
  geol. 
  Reichsanstalt, 
  &c. 
  

   vol. 
  viii. 
  p. 
  67. 
  

  

  