452 
BEY.  J.  F.  BLAKE  OK  FELSITES  AND 
[Aug.  1S93, 
Fig. 
A^x  >  "K  V  v- F-A  / 
^  VAVVVVY 
V  A-  M  V  t  V  Ar' U  A,'  H 
|TaA>A^->> 
A / j.A4 /\  -r  >>  x A-< a ^ 
V T  /V^ 4  A , 
rVj-V  4v a  -A >A 7  A'  ^ a 
0  oh  »a°;«!"  o®°  Vo  0  o a  *  '.»  aa  tv>' 
«0A ?«°0°1  0  o  tj ‘V^o  0  c  0  o  o  o  o  Voc  V<  v  ■* 
?<?«  cd  aV  *  o  o  a  o  o  «  flo  '  7 
'»  o'oVo/ S|t  %°°  Vo,0  O  »°  o  }}l  0°  “o°  ®SA 
*  *  VO,T0  0°flO  O°4o  ’OO  C  -5_  o  O  0  0,0  *V\  . 
a6»»“ 0 °  ° V/\  1 
o  ®  O  °o  O  o  0  °  0  0  o  O  °So°0  0  °  0  0 
?;0»;}v/oY.^«»-“oo”o|s 
1  °*  9fl9,..0°ll 
VVAoVa00uVa2.vy?5  v  ''T  ^'x  > 
t>~AV  A-a  r7 
°n*o°  c0  °na°na  J  3  a/ \  /  ^"A  I  y'  -r -  ^ 
>•5  S 1“ « |  ?V  °  ^  VSy-Y  T  > 
'.S-tSioVi.^KvcJ'T  >y-r  T<"t  J 
/.vvj%4@v.<{sfs  V-r.v  V  >7 
,.vVA%w?s;AV  Ve  Ar-L 
AAo°“°AX°^Aof“V<°cv^i'f'r>Lr  //<^ 
^06,  ^  •'. 
.c.®  o*?0_ 
17  Vl  6 ; 
"i8+o 
J 19; 
f-j-A 
-  2^  <? 
-15  = 
LA, 
r  >7 
K 
Vk:7  I3A 
.6'  MAP 
OF 
^  COUNTRY  S.W. 
OF 
RLYN  PADARM. 
ScALEjlwCHES  =  I  MILE  . 
[For  Index  to  the  geological  symbols,  see  fig.  2, 
p.  447  ;  x,  x  at  12,  13  should  read  y,  y.~\ 
as  far  as  g,  and  it  is 
plain  to  me  now  that 
I  have  previously  con¬ 
founded  some  of  these 
more  slaty  beds  with 
the  Pale  Banded  Slates 
of  the  Cambrian.  From 
It  to  Z,  with  the  possible 
exception  of  F,  it  is 
plain  that  all  the  beds 
are  well-known  mem¬ 
bers  of  the  Cambrian 
Series,  while  the  con¬ 
glomerate  m  and  the 
grit  n  must  in  any  case 
overlie  them — i.  e.  be 
higher  than  some  of 
the  workable  slates.  It 
seems  to  me,  therefore, 
that  here  we  can  find 
no  escape  from  the  con¬ 
clusion  that  the  conglo¬ 
merates  and  associated 
beds  are  of  ‘  post-Llan- 
beris  ’  age.  The  oppo¬ 
site  conclusion  can  be 
maintained  only  by  de¬ 
nying  that  b  is  Purple 
Slate,  by  missing  the 
synclinal  bringing  up 
the  conglomerate  at  (/, 
and  by  supposing  m 
and  n  to  be  faulted  up 
from  great  depths. 
For  greater  satisfac¬ 
tion,  however,  we  must 
follow  these  beds  in¬ 
land,  and  it  will  be  best 
to  begin  at  the  eastern 
end.  In  fig.  7  we  have 
a  map  of  the  country 
about  here  which  differs 
somewhat  from  my 
former  one,  on  account 
of  the  discovery  that 
some  of  the  patches  of 
rock  interpreted  as 
Bhiw-wen  Grit  and 
Banded  Slates  really 
