﻿240 
  H. 
  KEEPING 
  ON 
  SOME 
  SECTIONS 
  

  

  In 
  ascending 
  order 
  (see 
  fig. 
  1), 
  at 
  the 
  base 
  is 
  Kimmeridge 
  Clay. 
  

   This 
  is 
  well 
  seen 
  here, 
  the 
  junction 
  with 
  the 
  Lower 
  Sands 
  and 
  Grits 
  

   being 
  exposed 
  at 
  that 
  portion 
  of 
  the 
  excavation 
  where 
  they 
  are 
  

   now 
  digging 
  sand 
  for 
  the 
  foundries 
  and 
  in 
  the 
  tram-incline. 
  The 
  

   uppermost 
  beds 
  are 
  laminated 
  bituminous 
  flaggy 
  shales, 
  the 
  " 
  slaty 
  

   and 
  shaly 
  bed 
  " 
  of 
  Prof. 
  Judd 
  (I. 
  c. 
  p. 
  248). 
  They 
  are 
  blackish- 
  

   brown 
  in 
  colour 
  ; 
  they 
  have 
  the 
  characteristic 
  appearance 
  of 
  bitu- 
  

   minous 
  Kimmeridge 
  shales, 
  and 
  contain 
  several 
  distinctive 
  fossils, 
  

   such 
  as 
  Belemnoteuthis 
  antiquus, 
  Pearce, 
  Ammonites 
  bijolex, 
  Sow., 
  

   fine 
  var., 
  Discina 
  latissima, 
  Sow., 
  also 
  a 
  Posidonomya, 
  Pecten, 
  and 
  

   Astarte. 
  

  

  Fig. 
  1. 
  — 
  Diagram 
  of 
  Claxby 
  Ridge. 
  

  

  Ki'TnTn 
  Clay 
  

  

  a. 
  Lower 
  Grits 
  and 
  Sands, 
  b. 
  Ironstone, 
  c. 
  Grey 
  clay 
  with 
  nodules. 
  

   d. 
  Tealby 
  Limestone, 
  e. 
  Upper 
  Sands. 
  

  

  Below 
  the 
  hard 
  flaggy 
  shales 
  are 
  strong 
  sticky 
  grey 
  clays. 
  

   There 
  are 
  fully 
  250 
  feet 
  (by 
  barometric 
  measurement) 
  of 
  these 
  

   Kimmeridge 
  beds 
  down 
  to 
  the 
  floor 
  of 
  the 
  valley 
  by 
  the 
  railway. 
  

  

  In 
  places 
  at 
  junction 
  with 
  the 
  Neocomian 
  sand 
  phosphatic 
  

   nodules 
  may 
  be 
  found 
  at 
  the 
  base 
  of 
  the 
  latter. 
  

  

  The 
  Lower 
  Sand 
  and 
  Grits 
  (a) 
  consist 
  of 
  various 
  shades 
  of 
  greenish 
  

   and 
  brown-green 
  : 
  the 
  sands 
  are 
  coarse 
  and 
  contain 
  the 
  black-coated 
  

   grains 
  so 
  common 
  in 
  the 
  Carstone 
  ; 
  sometimes 
  the 
  sands 
  are 
  

   mottled 
  with 
  spherical 
  brown 
  patches, 
  which 
  in 
  the 
  consolidated 
  

   sand-rock 
  weather 
  out 
  with 
  concentric 
  structure, 
  as 
  mentioned 
  

   by 
  Prof. 
  Judd 
  (L 
  c. 
  p. 
  248). 
  The 
  bands 
  of 
  grit 
  in 
  the 
  sand 
  are 
  

   rather 
  discontinuous. 
  At 
  the 
  top 
  of 
  the 
  sands 
  is 
  one 
  bed 
  about 
  2 
  feet 
  

   thick, 
  which 
  is 
  fairly 
  constant 
  all 
  along 
  the 
  terraced 
  ridge 
  from 
  

   Nettleton 
  : 
  it 
  is 
  fossiliferous 
  ; 
  but 
  the 
  fossils 
  are 
  difficult 
  to 
  extract 
  

  

  