32 
MISS  OGILVIE  ON  THE  WENGEN  AND 
[Feb.  1893, 
As  the  Cortina  map  shows  (Map  B,  facing  p.  28),  St.  Cassian 
Beds  are  faulted  against  all  the  higher  strata — Dachstein  Dolomite, 
Eaibl  Beds,  and  Schlern  Dolomite,  and  the  identification  of  the 
fauna  is  all-important  for  the  tectonic  relations  of  the  valley. 
Section  9.  St.  Cassian  and  Wengen  Beds  in  the  Durrenstein 
Massif  {Map  C). 
Although  the  fossils  collected  in  the  Seeland  Valley,  north  of 
Schluderbach,  have  been  familiar  to  palaeontologists  since  Loretz’s 
first  examination  of  them  in  1874, 1  the  exact  age  of  the  strata  in 
which  they  occur  remains  still  doubtful.  Loretz  referred  the  beds, 
like  those  on  Cortina  and  Falzarego  meadows,  to  the  horizon  of  the 
Eaibl  strata  known  generally  as  Schlern-plateau  strata,  while  in 
Mojsisovics’  ‘  Dolomit-Eifie  ’  they  are  regarded  as  Wengen  Beds, 
with  the  exception  of  a  very  small  portion  at  the  head  of  the  Seeland 
Valley,  which  are  recognized  as  St.  Cassian  Beds. 
The  strata  of  the  Seeland  Valley  are  composed  of  fossiliferous  marls 
and  shales,  unfossiliferous  beds  of  hard  light-grey  limestone  with 
celestine  or  calcite- veins,  and  thinly-bedded  unfossiliferous  shaly 
limestones.  In  the  higher  horizons  some  thick  limestones  occur, 
Fig.  9. — Section  through  Knollhopf  and  the  Durrenstein. 
w.s.w. 
Knapp  enfuss 
Thai.  Knollkopf. 
E.N.E. 
Plata 
Wiese. 
Durrenstein 
(Hellthaler  Schleehten). 
[The  Schlern  Dolomite  of  the  Diirrenstein  should  have  been  shown  dipping 
to  the  W.S.W.,  and  passing  conformably  under  the  Eaibl  Beds.] 
DK  =  Dachstein  Dolomite. 
E  =  Eaibl  Beds  (marls,  limestone,  rauchwacke). 
SD  =  Schlern  Dolomite. 
UC  =  Upper  St.  Cassian  Limestones. 
C  =  St.  Cassian  Strata  (marls  of  the  Stuores  zone  in  fig.  8 ;  fossili¬ 
ferous  marls  and  limestones,  unfossiliferous  marls  and  shales 
in  fig.  9). 
W  =  Wengen  shales  and  limestones. 
1  ‘  Einige  Petrefacten  d.  alpinen  Trias  a.  d.  Sudalpen.’  Zeitschr.  d.  Deutsch. 
geol.  Gesellsch.  vol.  xxvii.  (1875)  p.  784;  see  also  ibid.  vol.  xxvi.  (1874)  p.  377. 
