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MISS  OGILYIE  ON  THE  WENGEN  AND 
[Feb.  1893, 
The  Tofana  system  east  of  the  fault  has  been  thrown  down ; 
hence  it  is  that  Raibl  strata  are  in  contact  with  the  Schlern  Dolomite 
of  Lagazuoi,  and  blocks  of  Schlern  Dolomite  cover  the  greater  pait 
of  the  Roces  Alp  near  Lagazuoi.  The  continuation  of  this  fault-line 
is  followed  across  the  Costeana  Bach,  where  it  passes  between 
fossiliferous  Raibl  beds  (mentioned  in  the  stratigraphical  part  of 
the  present  paper)  on  the  western  or  upthrow  side  of  the  fault,  and 
unfossiliferous  variegated  marls  on  the  eastern  or  downthrow  side. 
The  general  strike  of  the  Tofana  Prima  massif  at  the  Roces  Alp 
is  east-and-west,  and  the  dip  north ;  but  on  the  eastern  slopes  of 
Tofana  Secunda  the  strata  strike  north-and-south,  and  dip  west. 
(This  bending  round  of  the  strata  is  similar  to  that  which  was 
observed  in  the  Enneberg  Valley,  north  of  Gardenazza  and  Kreuz 
Kofi,  and  again  at  Centurinus  Spitz  ;  the  strata  always  dip  towards 
the  central  area  of  Dachstein  Dolomite.) 
This  bending  round  has  been  accompanied  in  the .  neighbourhood 
of  Cortina  by  several  radial  faults.  I  cannot  enter  into  the  minute 
details  of  these.  Figs.  7  and  8  (pp.  ‘29,  30),  together  with  a  glance 
at  Map  B,  show  that  the  radial  faults  are  again  broken  by  faults 
parallel  with  the  main  direction  of  the  mountain  massif.  The 
higher  strata  are  faulted  down,  and  are  always  brought  to  different 
horizons,  until,  at  Col  Druscie,  Dachstein  Dolomite  and  Raibl  strata 
extend  down  to  the  Boita  Valley. 
The  Schlern  Dolomite  is  seen  only  at  two  places  within  the 
system  of  radial  faults.  One  of  these  is  near  the  \  ervieis  or 
Federale  chalets  ;  the  other  is  on  the  Majorera  slope,  just  north-east 
of  the  Lago  di  Majorera.  A  downthrow  of  Raibl  Beds  occurs  imme¬ 
diately  below  the  Schlern  Dolomite  on  Majorera,  and  these  are  again 
faulted  in  a  north-and-south  direction  against  St.  Cassian  strata. 
At  the  Roces  Alp  a  triangular  arrangement  of  faults  has  raised 
the  St.  Cassian  Beds;  in  the  south  they  come  in  contact  with 
Raibl  strata  (the  ‘  Falzarego  fault’),  in  the  west  with  different 
horizons  of  the  Col  dei  Bos  system,  and  in  the  east  the}  reach 
quite  close  up  to  the  sharp  angle  where  the  Dachstein  Dolomite  is 
faulted  so  far  forward,  and  forms  the  prominent  Verviers  (or 
Federale)  ridge.  Near  Cortina  the  outcrop  of  the  St.  Cassian  Beds 
forms  a  wide  undulating  meadow,  in  many  parts  entirely  covered 
by  a  superficial  mass  of  slipped  debris  and  broken  masses  from  the 
steep  Tofana  slopes.  Extensive  slips  have  occurred  in  the  neigh¬ 
bourhood  of  the  Romerlo  chalets,  where  the  red  Raibl  marls  and 
the  lower  fossiliferous  beds  have  slipped  eastward. 
The  Schlern  Dolomite  crag  of  Crepa  rises  abruptly  from  the 
midst  of  these  Cortina  meadows.  South  of  Crepa,  a  small  stream 
has  cut  its  way  through  a  rocky  gorge  in  the  dolomite ;  and  imme¬ 
diately  south  of  that,  St.  Cassian  and  Wengen  strata  are  seen  in 
place.  Exposures  of  these  strata  are,  however,  better  seen  in  the 
Costeana  stream  and  near  Pec  di  Palu.  Crepa  is  faulted  on  all 
sides,  and  is  a  part  of  the  overlying  rock  let  down  in  the  midst  of 
the  St.  Cassian  and  Wengen  strata. 
