60 
MISS  O&ILYIE  OH  THE  WENGEH  AMD 
[Feb.  1893, 
(i.)  The  District  of  Prelongei  and  Sett  Sass. 
(See  Hap  A,  facing  p.  18.) 
At  the  north-eastern  comer  of  the  Prelongei  map  lies  Centurinus 
Spitz,  a  peak  of  Dachstein  Dolomite.  Southward,  towards  Sore 
Bach,  this  Dachstein  Dolomite  is  in  contact  with  the  Schlern  Dolo¬ 
mite,  and  below  the  Schlern  Dolomite  are  the  St.  Cassian  Beds.  Very 
little  farther  south  the  St.  Cassian  Beds  form  the  slopes  below 
Lagazuoi,  and  above  them  follows  the  complete  succession,  i.  e. 
Schlern  Dolomite,  Raibl  Beds,  and  Dachstein  rocks. 
The  Raibl  Beds  and  part  of  the  Schlern  Dolomite  have  disappeared 
at  Centurinus  Spitz,  owing  to  an  east-and-west  fault.  The  Laga- 
Euoi  massif  is  south  of  the  fault-line,  while  the  Centurinus  Spitz, 
north  of  it,  is  on  the  downthrow  side,  Dachstein  Dolomite  having  been 
faulted  down  against  Schlern  Dolomite.  This  fault-line  bends  round 
towards  the  north,  and  may  be  followed  along  the  eastern  side  of 
the  Enneberg  Yalley.  The  rocks  east  of  it  are  everywhere  let  down 
against  older  strata.  I  shall  have  occasion  to  refer  again  to  this 
fault  in  connexion  with  the  Heiligkreuz  section. 
The  Falzarego  fault-line,  observed  by  Hojsisovics  in  the  Fal- 
zarego  or  Cortina  Yalley,  is  further  continued  over  the  Tra  i  Sassi 
Pass  and  Yalparola  in  a  south-east  and  north-west  direction,  and 
cuts  off  the  Lagazuoi  massif  from  Sett  Sass.  The  relations  at  this 
western  end  of  the  fault  remain  the  same  as  those  already  proved  in 
the  Falzarego  Yalley,  i.  e.  the  rocks  south  of  the  fault-line  are  in  all 
cases  thrown  down. 
In  the  Falzarego  Yalley  Raibl  strata  and  Schlern  Dolomite  are 
faulted  against  St.  Cassian  strata  ;  at  \  alparola,  within  the  district 
of  my  map,  Raibl  strata  and  Dachstein  Dolomite  are  faulted  against 
St.  Cassian  strata  and  Schlern  Dolomite.  The  throw  is  greater  in 
the  west  than  in  the  east,  where  Schlern  Dolomite  is  present  above 
the  St.  Cassian  Beds  south  of  the  fault-line.  According  to  the 
explanation  of  Hojsisovics,  the  Raibl  strata  rest  at  A  alparola  con¬ 
formably  upon  St.  Cassian  strata,  as  a  natural  consequence  of  the 
thinning-out  of  the  Schlern  Dolomite  of  Sett  Sass.  As  may  be  seen 
in  Hap  A  and  in  fig.  3  (p.  21),  there  is  clear  evidence  of  the  already 
mentioned  fault  north  of  Sett  Sass,  bringing  at  first  Raibl  Beds  and 
then  Dachstein  Dolomite  down  to  the  horizon  of  the  St.  Cassian  strata. 
Horeover,  I  have  proved  that  south  of  Sett  Sass  the  higher 
Hiddle  St.  Cassian  horizons  are  separated  by  an  east-and-west 
fault  from  the  IVengen  Beds  of  Honte  Sief,  while  towards  the 
west  the  Schlern  Dolomite,  Raibl  Beds,  and  Dachstein  Dolomite 
are  cut  off  from  the  St.  Cassian  strata  of  Prelongei  and  Stuores  by 
a  north-and- south  fault-line  of  considerable  throw. 
The  Sett  Sass  Berg  has  a  horseshoe  shape,  steep  cliffs  rise  all 
round  the  outer  convex  side,  but  the  rocks  descend  more  gently 
towards  the  inner  side.  In  this  way  the  woods  and  Alpe  of  Yalparola 
lie  in  a  rocky  hollow.  The  strata  have  a  general  east-and-west  strike, 
and  a  northerly  dip. 
The  southern  wall  of  Sett  Sass  is  Schlern  Dolomite,  succeeded 
