42 
r  MISS  OGILVIE  ON  THE  WENGEN  AND 
[Feb.  1893, 
There  are  no  fossiliferous  sandstones  and  limestones  as  in  the 
Cortina  and  Heiligkreuz  district,  but  the  entire  series  is  highly 
dolomitic,  and  the  transition  to  the  Schlern  Dolomite  very  gradual. 
This  explains  in  part  the  greater  thickness  of  the  dolomitic  rock  of 
the  Diirrenstein. 
Y.  Schlern  Plateau  :  Baibl  Beds. 
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These  have  been  long  familiar  in  the  literature  of  Southern  Tyrol, 
and  have  been  again  re- 
pq  cently  made  the  subject  of 
special  research.1  I  quote 
briefly  the  result  of  these 
palaeontological  studies  for 
comparison  with  my  sections 
elsewhere.  The  fossiliferous 
beds  exposed  in  the  Schlern 
Klamm  pass  on  the  plateau 
into  a  facies  of  coral-bearing 
dolomite,  and  farther  on 
into  red  and  bluish-purple 
ferruginous  marls.  These 
rest  upon  a  stratified  dolo¬ 
mite,  in  which  a  bed  of 
augite-porphyry  and  tuff  is 
locally  present,  and  are  suc¬ 
ceeded  by  stratified  dolo¬ 
mite,  in  which  corals  and 
cidarid  spines,  and,  at 
higher  horizons,  small  spe¬ 
cies  of  Megalodon  often 
occur. 
A  full  comparison  of  the 
fauna  has  been  made  by 
Wohrmann,  and  the  con¬ 
clusion  drawn  that  the 
fossiliferous  Schlern-plateau 
strata  correspond  with  the 
Myo'phoria  Kefersteini  - 
horizon  at  Baibl  and  the 
upper  part  of  the  Carditci- 
strata  in  Northern  Tyrol. 
A  number  of  species  are 
entirely  peculiar  to  the  one 
locality  of  the  Schlern  plateau ;  others  occur  in  St.  Cassian .  or 
Baibl  Beds,  or  are  common  to  both.  But,  as  more  St.  Cassian 
species  are  present  in  the  Schlern- plateau  Beds  than  in  the 
1  Wohrmann  u.  Koken,  ‘  Die  Fauna  der  Raibler  Schickten  vom  Schlern 
plateau,’  Zeitschr.  d.  Deutsch.  geol.  Gesellsch.  vol.  xliv.  (1892)  p.  167. 
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