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THE  WEN  GEN  AND  ST.  CASSIAN  STRATA. 
[Feb.  1893, 
abnormal  forms  such  as  Tiarechinus ,  suggested  an  unfavourable 
environment,  and  the  speaker  hoped  that  Miss  Ogilvie’s  work  would 
demonstrate  whether  these  were  due  to  deep-sea  or  lagoon  con¬ 
ditions. 
Mr.  Vaughan  Jennings  said  that  any  geologist  who  knew  the 
country  of  the  Schlern,  the  Lung  Kofi,  and  the  Sella  Joch  would 
welcome  new  evidence  on  the  stratigraphy  of  the  district.  If 
the  area  of  discussion  were  widened,  as  it  had  been  by  previous 
speakers,  to  include  the  Western  Alps,  it  should  also  include  the 
Southern.  In  the  Ligurian  region,  which  he  had  recently  been  able 
to  examine,  there  was  a  sudden  thinning-out  of  dolomite-reefs 
similar  to  that  of  the  Tyrol — for  instance,  Monte  del  Gazo  near  Genoa. 
Here,  careful  examination  and  mapping  precluded  the  idea  of  simple 
faulting  ;  at  any  rate,  later  than  the  Eocene.  If  it  were  a  system 
of  faults  which  here  caused  the  thinning-out  of  the  dolomite,  it  was  a 
very  ancient  series  of  earth-movements,  not  a  recent  one. 
Mr.  Topley  remarked  that  whilst  one  important  result  obtained 
by  Miss  Ogilvie  was  to  fix  the  position  of  the  Schlern  Dolomite 
between  the  St.  Cassian  and  Baibl  strata,  her  observations  at  the 
same  time  showed  that  masses  of  dolomite  occurred  at  other  horizons  ; 
for  instance,  the  Cipit  Limestone  lies  in  the  Lower  St.  Cassian  Beds, 
whilst  the  Bichthofen  Biff  is  a  lenticular  mass  of  dolomite  in  the 
Middle  St.  Cassian. 
The  Bev.  J.  F.  Blake  also  spoke. 
