﻿48 
  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  [NoV. 
  18, 
  

  

  Two 
  geological 
  maps 
  of 
  Java 
  have 
  been 
  published, 
  — 
  one 
  by 
  M. 
  

   Junghuhn, 
  which 
  I 
  have 
  not 
  seen 
  ; 
  and 
  a 
  much 
  older 
  one, 
  printed 
  

   on 
  the 
  same 
  sheet 
  as 
  Sir 
  Stamford 
  RafBes's 
  map 
  of 
  the 
  Island, 
  by 
  Dr. 
  

   Horsfield, 
  of 
  which 
  it 
  need 
  only 
  be 
  observed 
  that 
  the 
  locality 
  whence 
  

   M. 
  de 
  Groot's 
  fossils 
  were 
  obtained, 
  like 
  the 
  greater 
  portion 
  of 
  the 
  

   Island, 
  is 
  coloured 
  as 
  purely 
  volcanic. 
  

  

  From 
  Mr. 
  Jukes's 
  book 
  on 
  the 
  ' 
  Voyage 
  of 
  H.M.S. 
  Fly,' 
  it 
  ap- 
  

   pears 
  that 
  he 
  visited 
  only 
  the 
  more 
  eastern 
  portion 
  of 
  Java, 
  and 
  that 
  

   he 
  was 
  not 
  able 
  to 
  make 
  any 
  very 
  extended 
  geological 
  observations. 
  

  

  In 
  the 
  first 
  volume 
  of 
  the 
  ' 
  Palteontographica 
  '*, 
  Herr 
  Dunker 
  

   gave 
  a 
  diagnosis 
  and 
  a 
  figure 
  of 
  a 
  single 
  species 
  of 
  Turritella 
  from 
  

   Java 
  ; 
  and, 
  with 
  this 
  solitary 
  exception, 
  no 
  fossil 
  Mollusca 
  from 
  the 
  

   Island 
  have 
  yet 
  been 
  described. 
  

  

  2. 
  Geology 
  of 
  the 
  Mount-Sela 
  District. 
  — 
  The 
  last 
  volume 
  of 
  the 
  

   Society's 
  Journal 
  contains 
  a 
  short 
  paper 
  by 
  M. 
  Corn, 
  de 
  Grootf 
  , 
  in 
  

   which 
  it 
  is 
  stated 
  t 
  that 
  he 
  had 
  sent 
  to 
  England, 
  amongst 
  other 
  

   rocks 
  and 
  fossils, 
  a 
  collection 
  of 
  specimens 
  from 
  the 
  clay 
  and 
  marly 
  

   sandstone 
  of 
  Mount 
  Sola 
  (Gunung 
  Sela), 
  a 
  hill 
  about 
  2000 
  Paris 
  

   feet 
  (2130 
  English 
  feet) 
  in 
  height. 
  Through 
  the 
  kindness 
  of 
  Sir 
  

   R. 
  I. 
  Murchison, 
  to 
  whom 
  these 
  fossils 
  were 
  sent, 
  they 
  were 
  pre- 
  

   sented 
  to 
  the 
  Society 
  soon 
  after 
  the 
  reading 
  of 
  M. 
  de 
  Groot's 
  paper. 
  

  

  Mount 
  Sela 
  is 
  situated 
  in 
  the 
  Kuningan 
  District 
  of 
  the 
  Tjeribon 
  

   Residence, 
  and 
  forms 
  part 
  of 
  the 
  Kendenggebirge 
  ; 
  it 
  is 
  also 
  situated 
  

   at 
  the 
  southern 
  side 
  of 
  the 
  foot 
  of 
  the 
  Gunung 
  Tjerimai 
  — 
  a 
  huge 
  

   volcano 
  about 
  10,000 
  English 
  feet 
  in 
  height, 
  — 
  and 
  assists 
  in 
  forming 
  

   the 
  northern 
  boundary 
  of 
  a 
  great 
  valley 
  of 
  denudation, 
  the 
  southern 
  

   margin 
  of 
  which 
  is 
  formed 
  by 
  the 
  Rantja 
  Plateau. 
  

  

  Respecting 
  this 
  and 
  the 
  neighbouring 
  districts 
  M. 
  Junghuhn 
  re- 
  

   marks 
  § 
  that 
  " 
  the 
  south-western 
  part 
  of 
  the 
  Plateau 
  of 
  Randong 
  

   (2100 
  feet 
  || 
  high), 
  namely, 
  the 
  district 
  of 
  Ronga, 
  upon 
  the 
  south 
  side 
  

   of 
  the 
  Tji-Tarumkluft, 
  is 
  bounded 
  on 
  the 
  south 
  by 
  a 
  kind 
  of 
  ' 
  Sub- 
  

   apennine 
  Formation,' 
  which 
  reposes 
  upon 
  the 
  flanks 
  of 
  a 
  still 
  more 
  

   southern, 
  partly 
  volcanic, 
  arch. 
  The 
  strata 
  of 
  this 
  formation, 
  ex- 
  

   tending 
  from 
  Lio-tjitjangkang 
  westwards 
  to 
  the 
  Gunung 
  Sela, 
  con- 
  

   sists 
  of 
  clay 
  and 
  bluish 
  -white, 
  often 
  marly, 
  sandstones, 
  and 
  are 
  very 
  

   rich 
  in 
  marine 
  Shells 
  in 
  an 
  extremely 
  good 
  state 
  of 
  preservation." 
  

   The 
  sandstones 
  appear 
  to 
  be 
  the 
  principal 
  rocks, 
  and 
  are 
  further 
  

   described 
  by 
  this 
  author 
  as 
  being 
  bluish-grey, 
  fine- 
  or 
  medium- 
  

   grained, 
  calcareous 
  (effervescing 
  with 
  acids), 
  firm 
  but 
  easily 
  weather- 
  

   ing, 
  and 
  in 
  places 
  very 
  rich 
  in 
  fossil 
  Shells 
  and 
  Corals 
  ; 
  and 
  as 
  

   occurring 
  in 
  beds, 
  from 
  1 
  to 
  2 
  feet 
  thick, 
  alternating 
  with 
  partings, 
  

   from 
  3 
  inches 
  to 
  1 
  foot 
  in 
  thickness, 
  of 
  similarly 
  coloured, 
  hard, 
  

   often 
  shining, 
  bituminous 
  clay. 
  

  

  The 
  physical 
  features 
  of 
  the 
  district 
  may 
  be 
  described 
  in 
  a 
  very 
  few 
  

   words, 
  as 
  they 
  so 
  nearly 
  resemble 
  those 
  of 
  the 
  "Wealden 
  of 
  England, 
  

   and 
  it 
  requires 
  merely 
  a 
  glance 
  at 
  the 
  accompanying 
  section 
  (after 
  

   Junghuhn) 
  to 
  make 
  any 
  geologist 
  acquainted 
  with 
  the 
  differences 
  in 
  

  

  * 
  Vol. 
  i. 
  Lief. 
  3. 
  p. 
  132. 
  pi. 
  xviii. 
  fig. 
  10. 
  

  

  t 
  Vol. 
  xix. 
  p. 
  515, 
  1863. 
  J 
  P. 
  516 
  (footnote). 
  

  

  § 
  Op. 
  cit. 
  vol. 
  iii. 
  p. 
  72. 
  || 
  Paris 
  feet, 
  equal 
  to 
  nearly 
  2240 
  English 
  feet. 
  

  

  