﻿244 
  ON 
  SOME 
  SECTIONS 
  OF 
  LINCOLNSHIRE 
  NEOCOMIAN. 
  

  

  ferruginous, 
  reddish-brown 
  in 
  colour, 
  and 
  contain 
  scattered 
  phosphatic 
  

   nodules 
  in 
  a 
  broad 
  band 
  as 
  indicated 
  in 
  the 
  sketch. 
  

  

  The 
  sands 
  vary 
  in 
  coarseness 
  in 
  different 
  layers 
  ; 
  in 
  some 
  the 
  

   rolled 
  quartz 
  is 
  larger 
  than 
  peas 
  ; 
  the 
  black 
  pebbles 
  and 
  grains 
  so 
  

   common 
  in 
  the 
  Potton 
  district 
  and 
  in 
  the 
  Norfolk 
  Carstone 
  are 
  also 
  

   abundant. 
  

  

  At 
  first 
  sight 
  it 
  would 
  appear 
  as 
  if 
  in 
  this 
  section 
  the 
  Eed 
  Chalk 
  

   (Hunstanton 
  Chalk) 
  were 
  unconformable 
  to 
  the 
  Neocomian 
  ; 
  but 
  it 
  is 
  

   not 
  so 
  ; 
  otherwise 
  the 
  White 
  Chalk 
  would 
  have 
  to 
  be 
  considered 
  

   unconformable 
  to 
  the 
  Eed. 
  The 
  appearance 
  of 
  the 
  Chalk 
  not 
  being- 
  

   affected 
  by 
  the 
  slips 
  which 
  have 
  dislocated 
  the 
  sands, 
  and 
  the 
  apparent 
  

   overlapping 
  of 
  the 
  Chalk, 
  are 
  merely 
  local 
  effects 
  due 
  to 
  the 
  form 
  and 
  

   slope 
  of 
  the 
  hill 
  in 
  combination 
  with 
  denuding 
  action 
  causing 
  a 
  

   slight 
  rearrangement. 
  

  

  The 
  difference 
  between 
  the 
  Eed 
  Chalk 
  of 
  this 
  section, 
  which 
  is 
  on 
  

   the 
  horizon 
  of 
  that 
  of 
  Hunstanton, 
  and 
  the 
  pinkish 
  chalk 
  of 
  the 
  

   Louth 
  area, 
  which 
  is 
  seen 
  to 
  the 
  east 
  of 
  this 
  tuunel, 
  has 
  been 
  well 
  

   pointed 
  out 
  by 
  Prof. 
  Judd. 
  

  

  Discussion. 
  

  

  Mr. 
  Tawney 
  remarked 
  on 
  the 
  importance 
  of 
  the 
  discovery 
  of 
  well- 
  

   preserved 
  fossils 
  from 
  the 
  Benniworth-Haven 
  cutting. 
  He 
  agreed 
  

   with 
  Mr. 
  Keeping 
  as 
  to 
  the 
  age 
  of 
  the 
  sandy 
  beds 
  near 
  Market 
  

   Easen. 
  

  

  Prof. 
  Seeley 
  asked 
  if 
  the 
  section 
  did 
  not 
  contain 
  representatives 
  

   of 
  the 
  Kimmeridge, 
  Portland, 
  and 
  Purbeck, 
  as 
  well 
  as 
  Neocomian. 
  

   He 
  remarked 
  that 
  the 
  Portland, 
  as 
  it 
  passes 
  northward, 
  loses 
  its 
  cal- 
  

   careous 
  characters, 
  and 
  becomes 
  sandy 
  in 
  character. 
  William 
  Smith 
  

   appears 
  to 
  have 
  regarded 
  these 
  beds 
  as 
  being 
  of 
  Portlandian 
  age. 
  

  

  Prof. 
  Judd 
  remarked 
  that 
  we 
  were 
  greatly 
  indebted 
  to 
  the 
  author 
  

   for 
  detailed 
  descriptions, 
  with 
  lists 
  of 
  fossils, 
  of 
  railway-cuttings 
  which 
  

   will 
  soon 
  be 
  overgrown 
  and 
  rendered 
  obscure. 
  He 
  noticed 
  the 
  remark- 
  

   able 
  absence 
  of 
  forms 
  of 
  Brachiopoda 
  from 
  the 
  localities 
  examined 
  

   by 
  Mr. 
  Keeping, 
  while 
  he 
  had 
  himself 
  found 
  a 
  considerable 
  number 
  

   of 
  very 
  curious 
  and 
  characteristic 
  Neocomian 
  forms*. 
  He 
  stated 
  

   that, 
  in 
  the 
  district 
  where 
  his 
  own 
  section 
  was 
  drawn, 
  downwash 
  

   from 
  the 
  Lower 
  Sand 
  and 
  Sandstone 
  covered 
  considerable 
  areas 
  of 
  

   the 
  Kimmeridge 
  Clay. 
  In 
  reply 
  to 
  Prof. 
  Seeley 
  he 
  stated 
  that 
  the 
  

   fossils 
  of 
  the 
  Tealby 
  Series 
  agree 
  most 
  closely 
  with 
  those 
  of 
  the 
  

   Middle 
  Neocomian 
  of 
  the 
  Continent. 
  

  

  * 
  See 
  footnote, 
  p. 
  242. 
  

  

  