18 
THE  WEN GEN  AND  ST.  CASSIAN  STRATA.  [Feb.  1 893. 
Wengen  Beds  is  seen  along  the  Budort  stream  where  it  bends 
towards  Corvara,  cutting  through  a  conformable  succession  of  rocks 
from  augite-porphyry  and  Halobia-MdlQQ  to  St.  Cassian  Beds  below 
the  Crap  de  Sella  rock.  The  occurrence  of  some  slight  throws 
does  not  seriously  interfere  with  the  succession.  The  ‘  contact  ’ 
appearances  in  the  beds  of  No.  6  are  here  very  clearly  shown. 
Section  2.  Prelongei  and  Stuores  Wiese.  (See  Table  and  Map  A.) 
Additional  remarks. — The  beds  form  a  shallow  syncline,  dipping 
more  steeply  on  the  southern  side,  20°  to  25°,  and  less  on  the 
northern,  5°  to  10° ;  general  strike  east  and  west. 
This  section,  described  in  the  Table,  offers  peculiar  difficulties, 
owing  to  the  slips  of  larger  or  smaller  portions  of  rock.  On  the 
southern  side  the  beds  of  Nos.  11-7  are  exposed  in  steep  ‘Muren,5 
and  the  debris  from  these  are  heaped  up  at  all  the  lower  levels,  and 
on  the  banks  of  the  Selvaza  sources  coming  from  Prelongei.  Fol¬ 
lowing  the  strike  of  the  beds,  frequent  opportunities  are  afforded  in 
the  streams  and  on  the  slopes  above  Contrin  of  convincing  one’s  self 
that  there  is  a  conformable  series  from  Contrin  to  Prelongei,  agree¬ 
ing  in  the  main  with  the  series  in  Section  1.  This  section  has  the 
more  value,  as  the  underlying  Muschelkalk  and  Werfen  Beds, 
exposed  along  the  Buchenstein  Valley,  follow  conformably  in  down¬ 
ward  succession. 
On  the  Stuores  side  of  Prelongei,  the  beds  are  so  altered  in  their 
position  by  the  small  throws,  associated  with  the  slips,  that  in  the 
meadows  drained  by  the  sources  of  the^Piccol  stream  the  exposures 
have  a  north-easterly  strike.  Lower  down  the  strike  is  more  regular. 
While  the  most  richly  fossiliferous  beds  are  limited  to  the  com¬ 
paratively  thin  series  No.  11,  from  50  to  60  feet,  these  are  borne 
downwards  as  a  cap,  from  the  high  ridge  of  Prelongei  towards  the 
lower-lying  meadows  of  Stuores  and  Piccol,  on  the  soft  yielding  mass 
of  the  underlying  ashy  and  less  fossiliferous  beds.  To  this  fact,  as 
well  as  to  the  very  slight  dip  of  the  strata,  and  the  many  minor 
throws  they  have  undergone,  we  owe  the  ever-renewed  abundance 
of  the  St.  Cassian  fossils  strewn  on  the  banks  of  the  streams  and  on 
the  hillocks  of  slipped  material. 
At  the  same  time  many  fossils  are  found,  belonging  to  true 
St.  Cassian  species,  in  beds  Nos.  10,  9,  8  in  the  tabular  description 
(facing  p.  16),  and  according  to  their  evidence  the  strata  may  he 
grouped  as  follows : — 
St  Cassian  Beds  =  Nos.  12-8.  j  gee  TaUe_ 
Wengen  Beds  =  Nos.  7-2.  j 
Section  3.  Sett  Sass  and  Monte  Sief.  (See  Table  and  Map  A.) 
Additional  remarks. — The  important  fact  here  proved  is  that 
the  fcBsiliferous  series  of  St.  Cassian  Beds  underlie  conformably 
the  dolomitic  rock  of  Sett  Sass.  This  is  seen,  not  only  on  the 
Forcella  between  Sett  Sass  and  the  Bichthofen  Biff,  but  also  in  two 
or  three  places  where  Sett  Sass  bends  round  towards  the  west. 
