Vol.  49.]  SOME  COAST-SECTIONS  AT  THE  LIZARD.  209 
East  of  the  granulitic  wedge,  a  dyke  o,  varying  from  18  to  24 
inches  in  width,  is  seen  cutting  the  serpentine  and  running  to  the 
top  of  the  cliff  in  a  north-easterly  direction.  About  40  feet  from 
the  base  of  the  cliff  a  fault  crosses  the  dyke,  throwing  it  down  2 
feet.  Fifteen  feet  above  this  fault  a  reddish  rock  X  is  seen  to  emerge 
from  the  turf  and  join  the  dyke.  On  the  other  side  of  a  talus  20 
feet  wide,  it  becomes  banded  with  the  basic  rock  of  the  dyke,  and 
runs  along  in  a  banded  state  for  20  feet  at  r.  The  reddish  rock  is 
of  medium  grain,  crystalline  in  texture,  and  is  composed  of  ortho- 
clase  and  plagioclase,  with  a  few  small  flakes  of  biotite.  At  s  there 
Eig.  4. —  Wedge  G  in  the  view  {fig.  3). 
[Diagrammatic.] 
Scale  :  1  inch  =  about  9  feet. 
The  serpentine  at  the  base  is  in  the  form  of  loose  blocks  lying  in  front  of 
the  wedge. 
is  a  cake-like  mass  resting  on  the  serpentine.  It  is  a  fine-grained, 
dark  greyish  schist,  composed  of  hornblende  and  felspar,  with  small 
grains  of  iron  ore.  Foliation  is  well  marked  and  its,  strike  is 
north-east. 
Q.  J.  G.  S.  No.  194. 
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