16 
MISS  OGILVIE  ON  THE  WENGEN  AND 
[Feb. 1893, 
hood  of  Prags,  are  less  developed  and  of  less  marked  character, 
while  thick  beds  of  dark-blue  limestones  containing  plant-remains, 
and  more  rarely  the  typical  ammonites  and  brachiopods,  are  inter- 
stratified  with  dark  bituminous  shales,  and  form  the  greater  thick¬ 
ness  of  the  Buchenstein  series. 
4.  The  Wengen  Beds. — The  Wengen  Beds,  and  indeed  all  the 
higher  members  of  the  Triassic  succession,  have  a  much  wider  dis¬ 
tribution  in  the  districts  which  I  have  mapped  than  the  foregoing 
strata. 
The  conformable  succession  of  Wengen  Beds  above  Buchenstein 
Beds  is  proved  in  all  the  outcrops  of  Bower  and  Middle  Trias  already 
indicated.  Enneberg  is  the  classical  district  of  W engen  and  St.  Cassian 
Beds.  It  was  in  the  village  of  Wengen,  lying  in  one  of  the  trans¬ 
verse  valleys  of  Lower  Enneberg,  that  the  characteristic  fossils 
were  first  collected.  The  name  of  Wengen  strata  was  then  given  by 
Wissmann  (‘  Petrefaktenkunde,’  p.  21).  Emmrich  had  called  these 
strata  on  the  Seisser  Alpe  ‘  Ecdobia- strata.’  Farther  south,  in  the 
vicinity  of  Spessa,  on  Armentara  Berg,  and  throughout  the  whole 
Gader  stream-cutting  from  Abtey  (or  St.  Leonhardt)  as  far  as 
the  confluence  of  the  Sore  and  Eisenofen  streams,  the  outcrop  of  the 
Wengen  Beds  and  of  the  St.  Cassian  Beds  succeeding  them  on  the 
higher  ground  has  given  rise  to  the  slopes  and  meadows  of  Upper 
Enneberg.  Wore  favourable  exposures  of  the  Wengen  Beds  are 
found  on  the  southern  slopes  of  Prelongei,  between  the  villages  of 
Corvara  and  Buchenstein,  and  from  these  the  sections  to  be  presently 
described  were  mainlj7  taken. 
As  the  Cortina  map  shows  (Map  B,  facing  p.  28),  true  Wengen 
Beds  are  but  little  exposed  in  the  Ampezzo  Valley. 
In  the  Prags  district,  the  Wengen  Beds  have  a  wide  outcrop  on 
the  Sari  Alp  and  Schafriedl,  and  on  the  Kameriod  Wiesen. 
5.  The  St.  Cassian  Beds.— These  richly  fossiliferous  strata  are 
spread  over  the  Prelongei  Alpe  and  occur  on  the  higher  parts  of  the 
surrounding  slopes.  In  the  other  districts  mapped,  near  Cortina 
and  the  western  slopes  of  the  Diirrenstein,  the  St.  Cassian  Beds 
extend,  in  my  opinion,  over  a  wider  area  than  has  hitherto  been 
admitted. 
I  now  enter  into  the  details  of  the  original  maps  and  sections 
with  regard  to  the  Wengen  and  St.  Cassian  Beds;  the  strata  lying 
above  them  will  be  described  later  on  in  this  paper. 
V.  Stratigraphy  of  the  Wengen  and  St.  Cassian  Beds. 
The  succession  of  these  strata  in  the  districts  of  Corvara,  P^e- 
longei,  and  Sett  Sass  is  described  in  detail  in  the  annexed  Table, 
with  reference  to  the  three  typical  sections  (figs.  1,  2,  3,  on  pp.  17, 
19,  21)  through  the  area  of  Map  A. 
