﻿VOLCANO 
  OF 
  BAUZON 
  — 
  VALLEY 
  OF 
  BURZET. 
  29 
  

  

  There 
  are 
  two 
  portions 
  of 
  slaggy 
  lava 
  near 
  the 
  artificial 
  dam, 
  at 
  the 
  exit 
  of 
  

   the 
  stream 
  from 
  the 
  crater. 
  But 
  I 
  could 
  in 
  no 
  way 
  identify 
  them 
  with 
  the 
  dykes 
  

   so 
  prominently 
  alluded 
  to 
  by 
  Burat 
  ; 
  but 
  these 
  may 
  possibly 
  have 
  been 
  concealed 
  

   by 
  the 
  artificial 
  erection. 
  Indeed, 
  I 
  saw 
  nowhere 
  any 
  appearance 
  of 
  injected 
  

   lavas 
  into 
  fissures 
  in 
  the 
  granite. 
  The 
  crater 
  is 
  stated 
  by 
  Burat 
  to 
  be 
  1200 
  

   metres 
  (two-thirds 
  of 
  an 
  English 
  mile) 
  in 
  its 
  longer 
  diameter. 
  It 
  is 
  sensibly 
  oval 
  

   and 
  tolerably 
  flat, 
  presenting 
  three 
  mounds 
  of 
  scoriae 
  in 
  the 
  centre, 
  similar 
  to 
  those 
  

   which 
  occur 
  in 
  the 
  craters 
  of 
  recent 
  volcanoes. 
  

  

  Only 
  a 
  few 
  hundred 
  yards 
  in 
  a 
  north-west 
  direction 
  from 
  the 
  crater 
  of 
  Pal 
  is 
  

   the 
  little 
  Lac 
  de 
  F 
  errand 
  ; 
  erroneously 
  placed 
  in 
  Cassini's 
  map 
  at 
  the 
  head 
  of 
  the 
  

   valley 
  of 
  Montpezat. 
  Adjacent 
  to 
  it 
  is 
  a 
  small 
  lava 
  stream 
  (indicated 
  in 
  the 
  map), 
  

   which 
  might 
  lead 
  us 
  to 
  conclude 
  that 
  this 
  lake 
  had 
  been 
  a 
  small 
  volcanic 
  orifice 
  ; 
  

   this 
  is, 
  however, 
  uncertain. 
  Farther 
  on 
  in 
  the 
  same 
  direction 
  lies 
  the 
  volcano 
  

   of 
  Bauzon, 
  which 
  has 
  ejected 
  a 
  vast 
  quantity 
  of 
  scoriae, 
  and 
  is 
  the 
  last 
  of 
  the 
  re- 
  

   cent 
  volcanoes 
  of 
  the 
  Vivarais 
  on 
  this 
  side. 
  Otherwise 
  it 
  is 
  without 
  interest. 
  Its 
  

   height 
  above 
  the 
  sea, 
  by 
  my 
  observations 
  in 
  1841, 
  is 
  4922 
  feet. 
  

  

  Valley 
  of 
  Burzet 
  — 
  Crater 
  of 
  Fiollonge 
  — 
  Valleys 
  of 
  Antraigues 
  and 
  La 
  Bastide 
  — 
  

  

  Pic 
  de 
  VEtoile 
  — 
  Coupe 
  d'Aysac. 
  

  

  We 
  now 
  return 
  to 
  the 
  valley 
  of 
  Burzet, 
  which 
  is 
  a 
  tributary 
  of 
  the 
  main 
  

   valley 
  of 
  Montpezat, 
  but 
  which 
  extends 
  itself 
  to 
  a 
  great 
  distance 
  in 
  one 
  of 
  the 
  least 
  

   frequented 
  parts 
  of 
  the 
  country. 
  We 
  have 
  seen 
  (p. 
  23) 
  that 
  its 
  bed 
  is 
  filled 
  with 
  

   lava, 
  which 
  was 
  certainly 
  older 
  than 
  that 
  of 
  the 
  Gravenne 
  (see 
  Plate 
  IV., 
  fig. 
  1). 
  

   This 
  lava 
  may 
  be 
  traced, 
  with 
  little 
  intermission, 
  as 
  far 
  as 
  the 
  village 
  of 
  

   Burzet, 
  between 
  4 
  and 
  5 
  miles 
  from 
  its 
  outlet. 
  The 
  valley 
  is 
  beautifully 
  varied 
  

   in 
  scenery, 
  and 
  in 
  some 
  places 
  richly 
  wooded. 
  At 
  Burzet 
  it 
  widens, 
  receiving 
  a 
  

   tributary 
  on 
  the 
  right 
  bank 
  of 
  the 
  principal 
  stream. 
  This 
  tributary 
  takes 
  its 
  

   origin 
  near 
  the 
  crater 
  of 
  Pal 
  ; 
  but 
  its 
  course 
  presents 
  nothing 
  very 
  interesting. 
  The 
  

   lava 
  widens 
  at 
  the 
  junction 
  of 
  the 
  two 
  streams, 
  and 
  the 
  village 
  is 
  partly 
  built 
  

   upon 
  it. 
  It 
  would 
  be 
  difficult 
  to 
  select 
  a 
  more 
  exquisite 
  picture 
  of 
  rich 
  and 
  peace- 
  

   ful 
  scenery 
  than 
  the 
  neighbourhood 
  of 
  Burzet. 
  The 
  stream 
  is 
  small, 
  and 
  its 
  bed 
  

   generally 
  narrow 
  ; 
  yet 
  though 
  the 
  lava 
  masses 
  become 
  more 
  insulated 
  and 
  smaller 
  

   as 
  we 
  ascend, 
  nothing 
  indicates 
  that 
  we 
  have 
  arrived 
  at 
  their 
  commencement. 
  

   We 
  fancy 
  them 
  to 
  have 
  ceased 
  entirely, 
  when 
  in 
  some 
  re-entering 
  angle 
  of 
  the 
  

   valley 
  their 
  black 
  abrupt 
  faces 
  reappear, 
  clinging 
  to 
  the 
  granitic 
  soil, 
  moulded 
  

   upon 
  it, 
  and 
  the 
  columns 
  always 
  perpendicular 
  to 
  the 
  surface 
  of 
  cooling, 
  as 
  in 
  

   Plate 
  IV., 
  fig. 
  5. 
  The 
  slaggy 
  traces 
  of 
  the 
  current 
  often 
  rose 
  so 
  high 
  upon 
  the 
  

   banks, 
  that 
  I 
  repeatedly 
  thought 
  that 
  I 
  had 
  obtained 
  the 
  volcanic 
  orifice. 
  This, 
  

   and 
  the 
  concavity 
  of 
  the 
  surface 
  of 
  the 
  basalt 
  in 
  many 
  places, 
  as 
  in 
  Plate 
  II., 
  fig. 
  7, 
  

  

  VOL. 
  XX. 
  PART 
  I. 
  H 
  

  

  