﻿Washington 
  — 
  Igneous 
  Mocks 
  from 
  Smyrna, 
  etc. 
  41 
  

  

  Akt. 
  IV. 
  — 
  On 
  Igneous 
  Rocks 
  from 
  Smyrna 
  and 
  Pergamon 
  / 
  

   by 
  Henry 
  S. 
  Washington. 
  

  

  Of 
  the 
  specimens 
  described 
  in 
  the 
  following 
  brief 
  notes 
  

   those 
  from 
  Mt. 
  Pagos 
  near 
  Smyrna 
  and 
  from 
  Pergamon 
  were 
  

   collected 
  by 
  the 
  writer 
  in 
  the 
  spring 
  of 
  1892. 
  Those 
  from 
  the 
  

   other 
  Smyrna 
  localities 
  were 
  collected 
  by 
  Mr. 
  J. 
  S. 
  Diller 
  in 
  

   the 
  summers 
  of 
  1881 
  and 
  1882, 
  who 
  most 
  kindly 
  presented 
  

   them 
  and 
  his 
  notes 
  for 
  use 
  in 
  the 
  preparation 
  of 
  this 
  paper. 
  It 
  

   may 
  be 
  mentioned, 
  in 
  justice 
  to 
  him, 
  that 
  these 
  form 
  but 
  a 
  

   small 
  part 
  of 
  those 
  he 
  collected, 
  the 
  rest 
  not 
  being 
  available 
  in 
  

   time 
  for 
  publication. 
  The 
  writer 
  gladly 
  avails 
  himself 
  of 
  this 
  

   opportunity 
  of 
  expressing 
  to 
  Mr. 
  Diller 
  his 
  heartiest 
  thanks 
  

   for 
  his 
  kindness 
  and 
  generosity. 
  It 
  must 
  be 
  premised 
  that 
  

   these 
  notes 
  are 
  but 
  fragmentary 
  and 
  that 
  their 
  publication 
  

   seems 
  only 
  justified 
  by 
  the 
  scantiness 
  of 
  our 
  knowledge 
  of 
  the 
  

   rocks 
  of 
  Asia 
  Minor. 
  

  

  Augite-andesite, 
  Smyrna. 
  — 
  The 
  city 
  of 
  Smyrna 
  lies 
  at 
  the 
  

   head 
  of 
  a 
  deep 
  gulf 
  in 
  the 
  west 
  coast 
  of 
  Asia 
  Minor 
  and 
  is 
  

   surrounded 
  on 
  three 
  sides 
  by 
  igneous 
  rocks. 
  To 
  the 
  northwest 
  

   are 
  the 
  hills 
  of 
  Phocsea, 
  probably 
  of 
  andesites 
  and 
  their 
  tuffs 
  ; 
  

   to 
  the 
  north 
  and 
  northeast 
  the 
  andesitic 
  masses 
  of 
  Yamanlar 
  

   Dagh 
  and 
  Mt. 
  Sipylos 
  ; 
  and 
  immediately 
  to 
  the 
  south 
  and 
  

   southwest 
  a 
  ridge 
  of 
  igneous 
  rock 
  formed 
  of 
  the 
  hills 
  of 
  Mt. 
  

   Pagos, 
  Kara 
  Tash 
  and 
  Gioz 
  Tepe. 
  Since 
  the 
  early 
  descriptions 
  

   of 
  Hamilton* 
  and 
  Tchihatchen^f 
  little 
  or 
  nothing 
  has 
  been 
  

   written 
  on 
  the 
  geology 
  of 
  this 
  region, 
  with 
  the 
  exception 
  of 
  a 
  

   short 
  paper 
  by 
  vom 
  JRath4 
  Of 
  the 
  rocks 
  of 
  Phocsea 
  and 
  the 
  

   Sipylos 
  ridge 
  I 
  have 
  no 
  specimens, 
  so 
  that 
  we 
  must 
  confine 
  our- 
  

   selves 
  to 
  those 
  from 
  the 
  immediate 
  vicinity 
  of 
  Smyrna. 
  From 
  

   the 
  brief 
  descriptions 
  of 
  vom 
  Rath§ 
  and 
  the 
  notes 
  of 
  Mr. 
  

   Diller, 
  it 
  seems 
  that 
  the 
  Sipylos 
  rocks 
  are 
  closely 
  similar 
  to 
  

   those 
  of 
  Mt. 
  Pagos, 
  and 
  Mr. 
  Diller 
  also 
  compares 
  them 
  in 
  

   places 
  with 
  the 
  " 
  hypersthene-bearing 
  andesite 
  by 
  Assos." 
  

  

  Mt. 
  Pagos, 
  185 
  m 
  high, 
  is 
  the 
  eastern 
  end 
  of 
  a 
  ridge, 
  up 
  the 
  

   northern 
  and 
  eastern 
  flanks 
  of 
  which 
  the 
  modern 
  city 
  of 
  

   Smyrna 
  extends, 
  and 
  which 
  formed 
  in 
  antiquity 
  the 
  ancient 
  

   acropolis 
  or 
  citadel, 
  the 
  summit 
  being 
  still 
  crowned 
  with 
  ruined 
  

   walls. 
  It 
  is 
  composed 
  of 
  a 
  mass 
  of 
  andesite 
  which, 
  according 
  

   to 
  Hamilton 
  and 
  Tchihatcheff, 
  has 
  been 
  forced 
  up 
  through 
  

   underlying 
  beds 
  of 
  Cretaceous 
  (?) 
  limestone. 
  In 
  many 
  places 
  

  

  *W. 
  J. 
  Hamilton: 
  Researches 
  in 
  Asia 
  Minor, 
  London, 
  1842, 
  i, 
  54; 
  also 
  

   Hamilton 
  and 
  Strickland, 
  Trans. 
  Geol. 
  Soc, 
  London, 
  ii, 
  293. 
  

  

  ■f-P. 
  de 
  Tchihatcheff: 
  Asie 
  Mineure, 
  Geologie, 
  i, 
  Paris, 
  1867, 
  pp. 
  69-73. 
  

   % 
  Vom 
  Rath: 
  Sitzber. 
  Niedenh. 
  Ges 
  zu 
  Bonn, 
  1882, 
  pp. 
  16-26. 
  

   § 
  Quoted 
  in 
  Roth, 
  Geologie, 
  ii, 
  826, 
  1883. 
  

  

  