﻿ANNIVERSARY 
  ADDRESS 
  OF 
  THE 
  PRESIDENT. 
  131 
  

  

  Middle 
  Jurassic. 
  

  

  1. 
  Astartian 
  Limestone. 
  320 
  feet. 
  

  

  2. 
  Nodular 
  white 
  Limestones 
  = 
  Coral 
  Rag, 
  40 
  feet. 
  

  

  3. 
  Lower 
  Coral 
  Limestone. 
  

  

  a. 
  Compact 
  Limestone, 
  80-100 
  feet. 
  

  

  b. 
  " 
  Levique 
  " 
  Limestone, 
  50 
  feet. 
  

  

  c. 
  Oolitic 
  Shell-Limestone, 
  80-100 
  feet. 
  

  

  Department 
  of 
  the 
  Yonne. 
  — 
  Leymerie, 
  Raulin, 
  and 
  Cotteau 
  

   have 
  described 
  the 
  rocks 
  of 
  this 
  departmeut, 
  the 
  first 
  two 
  authors 
  

   in 
  1858, 
  and 
  Cotteau 
  in 
  1865 
  and 
  1868, 
  in 
  the 
  latter 
  year 
  associated 
  

   with 
  De 
  Loriol. 
  

  

  Leymerie 
  and 
  llauliii 
  classify 
  the 
  rocks 
  as 
  follows 
  : 
  — 
  

  

  Upper 
  Jurassic. 
  

  

  1. 
  Portland 
  Limestones, 
  135 
  feet. 
  

  

  2. 
  Kimmeridgian 
  Marls 
  and 
  Limestones, 
  330 
  feet. 
  

  

  Middle 
  Jurassic 
  

  

  1. 
  Astartian 
  Limestone. 
  

  

  2. 
  White 
  Coral 
  Limestone. 
  

  

  3. 
  Upper 
  Oxfordian 
  Limestone. 
  

  

  4. 
  Middle 
  Oxfordian 
  Limestones 
  or 
  Marls. 
  

  

  5. 
  Lower 
  Oxfordian 
  Ironstone. 
  

  

  Cotteau's 
  subdivisions 
  differ 
  chiefly 
  in 
  the 
  Sequanian 
  and 
  Corallian 
  

   series. 
  

  

  Portlandian. 
  

  

  1. 
  Zone 
  of 
  Pinna 
  sujprajurensis. 
  

  

  2. 
  ,, 
  Ammonites 
  gig 
  as. 
  

  

  Kimmeridgian 
  or 
  Sequanian. 
  

  

  1. 
  White 
  Limestones. 
  

  

  2. 
  Lithographic 
  Limestones. 
  

  

  Corallian. 
  

  

  Diceras-beds. 
  

  

  Oxfordian. 
  

  

  Zone 
  of 
  Amm. 
  plicatilis 
  and 
  Cidaris 
  florigemma. 
  

  

  Along 
  the 
  banks 
  of 
  the 
  Yonne 
  certain 
  beds 
  are 
  exposed 
  that 
  can 
  

  

  be 
  without 
  doubt 
  referred 
  to 
  our 
  true 
  Coral 
  Rag, 
  only 
  that 
  we 
  do 
  

  

  not 
  possess 
  the 
  Diceras-beds 
  (vide 
  Blake, 
  he. 
  cit. 
  pp. 
  530-537). 
  

  

  Department 
  of 
  Nievre. 
  — 
  Ebray 
  in 
  1864, 
  and 
  Douville 
  and 
  Jourdy 
  

   in 
  1875, 
  have 
  described 
  the 
  geology 
  of 
  this 
  department. 
  The 
  classi- 
  

   fication, 
  chiefly 
  compiled 
  from 
  the 
  country 
  along 
  the 
  banks 
  of 
  the 
  

   Loire, 
  is 
  as 
  follows 
  : 
  — 
  

  

  Kimmeridgian. 
  

  

  Astartian 
  Limestone. 
  

  

  Corallian. 
  

  

  1. 
  Upper 
  Lithographic 
  Limestone. 
  

  

  2. 
  Oolite 
  with 
  small 
  Diceras. 
  

  

  3. 
  Chalky 
  Limestone. 
  

  

  4. 
  Lithographic 
  Limestone. 
  

  

  5. 
  Oolite 
  of 
  La 
  Charite 
  with 
  Diceras 
  arietinum. 
  

  

  6. 
  Marly 
  Limestone 
  and 
  Lower 
  Lithographic 
  Limestones. 
  

  

  Arc; 
  o 
  vi 
  an. 
  

   1. 
  Sponge-marls 
  with 
  Ammonites 
  canaliculars. 
  

  

  12 
  

  

  