﻿376 
  

  

  THE 
  LA.TE 
  ME. 
  A. 
  CHAXPERXOWNE 
  ON 
  THE 
  

  

  climb 
  through 
  the 
  brushwood 
  shows 
  one 
  a 
  detached 
  patch 
  of 
  lime- 
  

   stone, 
  which 
  certainly 
  appears 
  to 
  double 
  back 
  upon 
  itself. 
  It 
  is 
  

   possible 
  that 
  this 
  may 
  after 
  all 
  be 
  only 
  a 
  lenticular 
  patch, 
  as 
  it 
  is 
  

   difficult 
  to 
  get 
  close 
  to 
  it. 
  But 
  be 
  this 
  as 
  it 
  may, 
  a 
  fuller 
  know- 
  

   ledge 
  of 
  the 
  mapping 
  proves 
  me 
  to 
  have 
  been 
  in 
  error 
  in 
  suggesting 
  

   that 
  the 
  contorted 
  grits 
  of 
  Southdown 
  Cliff 
  were 
  older 
  beds 
  than 
  the 
  

   limestones, 
  rolled 
  up. 
  

  

  We 
  now 
  take 
  the 
  principal 
  points 
  of 
  interest 
  from 
  Sharkham 
  

   Point 
  (where 
  we 
  have 
  a 
  base) 
  to 
  the 
  limestone, 
  unseen 
  in 
  the 
  Good- 
  

   rington 
  section. 
  

  

  At 
  Higher 
  Brixham 
  the 
  outcrop 
  of 
  the 
  limestone 
  makes 
  a 
  marked 
  

   feature 
  at 
  the 
  back 
  of 
  the 
  church, 
  and 
  at 
  Upton 
  lane, 
  at 
  the 
  foot 
  of 
  

   the 
  ascent, 
  red 
  grits 
  at 
  once 
  come 
  on, 
  which 
  must 
  here 
  rest 
  directly 
  

   on 
  the 
  limestone 
  without 
  even 
  the 
  igneous 
  rocks 
  between. 
  

  

  With 
  a 
  quarry 
  near 
  Lay 
  well 
  House 
  the 
  Higher 
  Brixham 
  lime- 
  

   stone 
  terminates 
  : 
  but 
  as 
  the 
  beds 
  dip 
  north-east 
  at 
  low 
  angles 
  it 
  is 
  

   clear 
  that 
  it 
  is 
  not 
  thinning 
  out 
  on 
  its 
  strike 
  at 
  this 
  precise 
  spot, 
  

   but 
  dips 
  away 
  from 
  a 
  fault, 
  which 
  throws 
  down 
  the 
  country 
  on 
  the 
  

   west, 
  and 
  surface-stones 
  prove 
  the 
  lavas 
  to 
  be 
  represented 
  near 
  the 
  

   foot 
  of 
  the 
  hill 
  at 
  Churston 
  Mill. 
  If 
  this 
  termination 
  is 
  not 
  a 
  fault, 
  

   there 
  is 
  no 
  escape 
  from 
  the 
  alternative 
  that 
  the 
  red 
  grits 
  must 
  cover 
  

   up 
  the 
  continuation 
  of 
  this 
  limestone 
  by 
  a 
  great 
  unconformity. 
  I 
  

   believe 
  the 
  fault 
  to 
  be 
  the 
  explanation. 
  Beyond 
  Lupton 
  House 
  the 
  

   relations 
  are 
  most 
  perplexing. 
  There 
  is 
  no 
  evidence 
  of 
  the 
  pre- 
  

   sence 
  of 
  the 
  igneous 
  rocks 
  along 
  the 
  Dartmouth 
  road 
  from 
  the 
  

   boundary 
  of 
  the 
  Churston 
  limestone, 
  and 
  instead 
  of 
  them 
  we 
  find 
  

   grey 
  slates 
  extending 
  for 
  a 
  mile 
  and 
  half, 
  and 
  the 
  purple 
  grits, 
  

   which 
  at 
  Higher 
  Brixham 
  rest 
  directly 
  on 
  limestone, 
  are 
  not 
  en- 
  

   countered 
  until 
  past 
  Lupton 
  Higher 
  Lodge, 
  near 
  the 
  track 
  leading 
  

   to 
  Higher 
  Lupton 
  (in 
  a 
  field 
  N.E.), 
  a 
  small 
  quarry 
  showing 
  them 
  

   dipping 
  S.E. 
  at 
  * 
  * 
  *. 
  De 
  la 
  Beche's 
  arrow-dip 
  west(15°-20°) 
  near 
  

   Churston 
  Station 
  is 
  correct. 
  The 
  grey 
  slates 
  for 
  the 
  first 
  half-mile 
  

   from 
  the 
  limestone 
  boundary, 
  although 
  not 
  immediately 
  exposed, 
  

   slope 
  when 
  seen 
  towards 
  the 
  north 
  with 
  the 
  fall 
  of 
  the 
  ground 
  ; 
  but 
  

   after 
  the 
  bearing 
  of 
  the 
  road 
  changes 
  they 
  appear 
  to 
  have 
  arched 
  

   over, 
  as 
  they 
  dip 
  steadily 
  E. 
  of 
  S. 
  in 
  the 
  direction 
  of 
  the 
  road. 
  This 
  

   is 
  near 
  the 
  third 
  milestone 
  from 
  Dartmouth. 
  

  

  The 
  question 
  arises 
  on 
  what 
  horizon 
  these 
  slates 
  are. 
  It 
  seems 
  

   to 
  be 
  the 
  general 
  opinion 
  that 
  the 
  soft 
  grey 
  slates 
  on 
  the 
  south 
  side 
  

   of 
  Galmpton 
  Creek 
  are 
  the 
  continuation 
  of 
  the 
  Mudstone 
  Slates 
  ; 
  

   they 
  are 
  much 
  like 
  them, 
  and, 
  if 
  so, 
  they 
  must 
  be 
  older 
  than 
  the 
  

   bulk 
  of 
  the 
  limestone, 
  which 
  dips 
  towards 
  them 
  near 
  the 
  boundary, 
  

   no 
  junction 
  being 
  seen. 
  Now, 
  however, 
  we 
  have 
  a 
  dividing 
  horizon 
  

   south 
  of 
  Galmpton, 
  inasmuch 
  as 
  the 
  lavas 
  begin 
  to 
  form 
  a 
  well- 
  

   marked 
  feature 
  (a 
  small 
  patch 
  occurring 
  east 
  of 
  the 
  railway 
  ex- 
  

   tending 
  to 
  Greenway 
  Ferry, 
  [while] 
  near 
  the 
  top 
  of 
  Greenway 
  Hill, 
  

   in 
  a 
  wooded 
  escarpment, 
  I 
  collected 
  a 
  specimen 
  identical 
  with 
  the 
  

   Nassau 
  amygdaloidal 
  schalstein). 
  They 
  overlie 
  the 
  grey 
  slates 
  at 
  

   Galmpton 
  Creek 
  ; 
  they 
  constitute 
  Brim 
  Hill, 
  and 
  dip 
  S.E. 
  17°, 
  at 
  

   the 
  mouth 
  of 
  the 
  Greenway 
  Tunnel. 
  Continuing 
  the 
  section, 
  we 
  

  

  