﻿7<3 
  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  

  

  Part 
  2 
  of 
  Prof. 
  JudcTs 
  first 
  paper 
  is 
  devoted 
  to 
  the 
  physical 
  rela- 
  

   tions 
  of 
  the 
  Secondary 
  rocks 
  of 
  the 
  east 
  coast 
  of 
  Scotland. 
  Exa- 
  

   mination 
  of 
  these 
  patches 
  of 
  Secondary 
  strata 
  clearly 
  shows 
  that 
  

   they 
  form 
  the 
  last 
  remaining 
  vestiges 
  of 
  extensive 
  formations 
  which 
  

   originally 
  covered 
  considerable 
  areas, 
  bnt 
  which 
  have 
  subsequently 
  

   been 
  removed 
  by 
  denudation. 
  Prof. 
  Judd 
  gives 
  a 
  list, 
  at 
  p. 
  113, 
  

   of 
  eight 
  localities 
  at 
  present 
  known 
  on 
  the 
  east 
  coast 
  of 
  Scotland 
  

   where 
  patches 
  of 
  Secondary 
  strata 
  occur. 
  These 
  are 
  : 
  — 
  1. 
  Caithness, 
  

   2. 
  Sutherland; 
  3. 
  Strata 
  between 
  Helmsdale 
  and 
  Allt-chollie 
  ; 
  4. 
  

   Kintradwell 
  ; 
  5. 
  Ross 
  : 
  6. 
  CadK-an-Righ 
  ; 
  7. 
  Cromartyshire 
  ; 
  and 
  

   8. 
  Elginshire. 
  

  

  The 
  relations 
  of 
  the 
  patches 
  of 
  Secondary 
  strata 
  in 
  the 
  east 
  of 
  

   Scotland 
  to 
  the 
  great 
  m 
  asses 
  of 
  Palaeozoic 
  age 
  are 
  as 
  follows 
  : 
  — 
  

  

  The 
  Jurassic 
  beds 
  were 
  deposited 
  in 
  a 
  basin 
  formed 
  of 
  the 
  Old 
  

   Red 
  Sandstone 
  rocks. 
  

  

  1. 
  " 
  The 
  Secondary 
  rocks 
  lie 
  indifferently 
  against 
  all 
  the 
  members 
  

   of 
  the 
  Lower 
  Palaeozoic 
  series, 
  from 
  the 
  Lower 
  Silurian 
  and 
  asso- 
  

   ciated 
  granites 
  up 
  to 
  the 
  Upper 
  Old 
  Red 
  Sandstone." 
  

  

  2. 
  " 
  There 
  are 
  no 
  indications 
  whatever, 
  in 
  this 
  series 
  of 
  Secondary 
  

   strata, 
  that 
  as 
  we 
  approach 
  the 
  Palaeozoic 
  rocks 
  we 
  are 
  coming 
  to 
  

   an 
  old 
  shore-line." 
  

  

  3. 
  " 
  The 
  evidence 
  of 
  disturbance 
  aud 
  dislocation 
  in 
  the 
  Secondary 
  

   strata 
  increases 
  as 
  we 
  approach 
  the 
  Palaeozoic 
  rocks 
  .... 
  they 
  are 
  

   often 
  found 
  in 
  a 
  completely 
  crumpled 
  and 
  crushed 
  condition 
  at 
  the 
  

   points 
  of 
  contact." 
  

  

  That 
  Secondary 
  strata 
  to 
  the 
  thickness 
  of 
  from 
  2000 
  to 
  3000 
  

   feet 
  once 
  existed 
  over 
  large 
  areas, 
  and 
  that 
  they 
  have 
  been 
  removed 
  

   with 
  the 
  exception 
  of 
  a 
  few 
  patches 
  by 
  denudation, 
  is 
  now 
  a 
  con- 
  

   firmed 
  fact. 
  After 
  describing 
  the 
  Triassic 
  and 
  its 
  Stagonolepis 
  and 
  

   Telerpeton 
  sandstones, 
  Mr. 
  Judd 
  enters 
  upon 
  the 
  conditions 
  of 
  the 
  

   Lower 
  Jurassic 
  deposits, 
  commencing 
  with 
  the 
  Rhaetic. 
  The 
  well- 
  

   known 
  Linksfield 
  sandstones, 
  which 
  are 
  highly 
  fossiliferous, 
  are 
  still 
  

   doubtfully 
  referred 
  stratigraphically. 
  The 
  fauna 
  is 
  that 
  of 
  the 
  

   Upper 
  Trias 
  or 
  transition 
  series 
  into 
  the 
  Lower 
  Lias 
  ; 
  22 
  genera 
  and 
  

   28 
  species 
  are 
  recorded 
  by 
  Mr. 
  Judd. 
  

  

  The 
  Lower 
  Lias. 
  —The 
  coast 
  at 
  Dunrobin 
  exhibits 
  Rhaetic 
  beds 
  

   passing 
  into 
  estuarine 
  strata, 
  which 
  Mr. 
  Judd 
  estimated 
  at 
  between 
  

   400 
  and 
  500 
  feet 
  in 
  thickness, 
  and 
  considered 
  to 
  be 
  of 
  Lower- 
  

   Middle-Lias 
  age. 
  A 
  very 
  interesting 
  section 
  is 
  given 
  (loc. 
  cit. 
  p. 
  143) 
  

   of 
  the 
  series 
  from 
  the 
  " 
  Reptiliferous 
  " 
  (Stagonolepis) 
  sandstone 
  

   upwards 
  ; 
  on 
  p. 
  150 
  Mr. 
  Judd 
  gives 
  in 
  tabular 
  form 
  the 
  nature, 
  

   order 
  of 
  succession, 
  and 
  palaeontological 
  features 
  of 
  these 
  Liassic 
  

   strata. 
  The 
  fauna 
  is 
  that 
  of 
  the 
  Lower 
  Lias 
  of 
  the 
  south 
  and 
  mid- 
  

   land 
  areas 
  in 
  England. 
  Thirty-two 
  species 
  are 
  named 
  from 
  these 
  

   Dunrobin 
  beds. 
  The 
  majority 
  of 
  the 
  species 
  occur 
  in 
  bed 
  No. 
  7 
  in 
  

   the 
  section 
  ; 
  numerically 
  they 
  are 
  as 
  follows 
  : 
  — 
  

  

  