76 
MISS  OGILVIE  ON  THE  WENGEN  AND 
[Feb.  1893, 
dip.  The  St.  Cassian  strata  are  the  same  as  those  which  dip  below 
the  Diirrenstein  along  its  northern  face,  and  here  also  the  Schlern 
Dolomite  follows  conformably  above  them.  Several  south-west  and 
north-east  faults  of  small  throw  let  down  the  Schlern  Dolomite 
and  the  underlying  strata  at  this  northern  corner.  The  St.  Cassian 
and  Wengen  strata  which  form  the  base  of  the  valley  are  faulted 
against  the  Dachstein  Dolomite  on  the  west. 
Farther  up  the  valley,  towards  the  Platz  Wiese,  the  road  passes 
through  Schlern  Dolomite,  but  towards  the  summit  the  Paibl  strata 
form  steep  slopes  below  the  road,  cut  by  stream-gullies  and  slipped 
in  various  directions. 
On  the  Platz  Wiese  Paibl  strata  are  exposed  in  conformable 
succession  upon  the  dolomite  descending  from  the  highest  ridge  of 
the  Diirrenstein.  The  beds  strike  north-west  and  south-east,  and 
dip  south-west.  On  the  steep  wooded  slope  between  Stolla  and 
the  road,  the  dolomite  and  the  St.  Cassian  strata  of  the  first 
system  strike  against  the  slipped  Paibl  Beds  which  form  part 
of  a  second  system.  This  fault  passes  then  through  the  dolomite 
itself  in  a  general  north-east  and  south-west  direction,  and  although 
it  cannot  be  followed  in  the  dolomite,  the  strike  of  the  two  systems 
differs  as  mentioned. 
The  Paibl  Beds  above  Stolla  do  not  properly  belong  to  the  strike- 
system  of  the  Platz  Wiese  and  the  Wallsche  Boden  farther  south, 
but  are  plainly  the  remains  of  a  big  slip  at  some  former  period  from 
the  rocks  of  the  Diirrenstein  above  the  Wiese. 
Dachstein  Dolomite  follows  conformably  above  the  Paibl  strata 
on  the  Wallsche  Boden  (see  pp.  41,  42,  and  fig.  14),  and  the  whole 
Platz  Wiese  system  is,  like  the  first  system,  faulted  against  the 
Dachstein  Dolomite  to  the  west. 
The  road  continues  southward  on  beds  of  dolomitic  flags,  which 
underlie  the  red  Paibl  marls  on  the  meadow,  and  only  very 
gradually  descends  towards  the  new  fort.  Here  a  rocky  ridge 
running  west  from  the  Hellthaler  Schlechten  spans  the  Platz 
Wiese  and  slopes  steeply  south  towards  the  Seeland  Valley.  The 
dolomite-flags  and  Paibl  marls  bend  up  on  the  northern  slope 
towards  Knollenkopf.  On  the  ascent  to  Knollenkopf  from  the  Platz 
Wiese  they  are  succeeded  conformably  by  rauchwackes  and  Dach¬ 
stein  Dolomite,  but  on  the  Seeland  Valley  face  of  the  ridge  the 
beds  of  the  Lower  Paibl  horizon  meet  the  north-and-south  fault  from 
the  Wallsche  Boden  and  are  cut  off  against  Dachstein  Dolomite. 
Again,  as  at  Stolla,  the  ‘  Platz  Wiese  system  ’  is  let  down  by  a  fault 
running  east-and-west  and  continuing  into  the  Schlern  Dolomite  of 
the  Diirrenstein.  On  the  southern  side  of  this  fault,  an  upthrow  of 
St.  Cassian  strata  forms  the  base  of  the  Seeland  Valley  and  is 
succeeded  eastward  by  Schlern  Dolomite  on  Strudelkopf.  This 
southerly  system  of  the  Diirrenstein  strikes  jNT.N.W.,  and  dips  with 
varying  angle  to  N.E.  ;  it  is  separated  by  the  continuation  of  the 
north-and-south  fault  from  the  Dachstein  Dolomite  of  Knollenkopf 
on  the  west  (see  fig.  9,  p.  32).  The  ‘  Strudelkopf  system  ’  is 
broken  by  several  small  cross-faults  which  bring  down  the 
