OLD  EED  SANDSTONE  OE  THE  COUNTY  OF  WATEEFOED. 
335 
System  A!. 
No. 
Bearing. 
Dip. 
Downthrow. 
Locality. 
1. 
E.  35  N. 
74°  N. 
10  feet  North. 
Lady  Waterford’s  Rocks. 
2. 
E.  35  N. 
75  N. 
3 feet  North. 
Lady  Waterford’s  Rocks. 
3. 
E.  35  N. 
90 
3 feet  North. 
Lady  Waterford’s  Rocks. 
4. 
E.  35  N. 
65  N. 
1 foot  North. 
Portnashrughaun. 
5. 
E.  35  N. 
90 
5 feet  North. 
Portnashrughaun. 
6. 
E.  30  N. 
N. 
104  feet  North. 
Old  Ship’s  Cove. 
7. 
E.  35  N. 
80  N. 
4 feet  North. 
East  of  Swiny  Head. 
8. 
E.  35  N. 
60  N. 
75  feet  North. 
Stony  Cove. 
Mean  =34°  22'  North  of  East  (Magnetic). 
System  C'. 
N'o. 
Bearing. 
Dip. 
Downthrow. 
Locality. 
1. 
N.  35  W. 
53°  W. 
8 feet  West. 
Centre  of  Red  Head. 
2*. 
N.  32  W. 
66  E. 
3 feet  West. 
Portnashrughau  n . 
3. 
N.  30  W. 
75  W. 
6 feet  West. 
Pusnahooan. 
4. 
N.  35  W. 
60  E. 
10  feet  East. 
East  of  Cathedral  Rocks. 
5. 
N.  35  W. 
80  W. 
2 feet  West. 
Creadan  Bay. 
Mean  =33°  24'  West  of  North  (Magnetic). 
There  is  one  other  fault,  not  referable  to  any  of  the  foregoing  systems ; it  occurs  at 
Rathmoylan  Cove  ; bearing,  N.  40°  E. ; clip,  70°  E. ; downthrow,  1 foot  eastward:  although 
it  appears  as  an  exception  at  first  sight,  it  will  be  seen  from  the  discussion  of  the  direc- 
tions of  the  joint  and  cleavage  planes,  that  this  fault  really  belongs  to  another  system  of 
planes  which  is  well  developed  in  other  parts  of  the  district.  Eoughly  speaking,  it 
appears  that  the  systems  A and  C,  A'  and  C',  have  bearings  nearly  at  right  angles  to  each 
other;  the  angle  between  the  fii’st  two  systems  being,  from  East  to  North,  93°  45',  and 
the  angle  between  the  systems  A'  and  C'  being  89°  2'. 
The  most  important  of  the  systems  of  faults,  estimated  by  the  amount  of  dislocation 
caused  by  them,  are  the  systems  C and  A';  the  former  containing  the  well-marked  doAvn- 
throAv  of  50  feet  east  of  Eed  Head,  and  the  latter  containing  the  two  greatest  faults  in 
the  entire  district,  viz.  104  feet  at  Old  Ship’s  Cove,  and  75  feet  at  Stony  Cove,  both  doAvn- 
throws  to  the  west.  If  we  had  no  other  evidence  of  the  physical  structure  of  the  con- 
glomerate than  is  supplied  by  the  foregoing  systems  of  faults,  we  should  be  entitled  to 
conclude  that  tAvo  systems  of  elevating  forces  had  acted,  either  simultaneously  or  in 
succession,  to  raise  the  conglomerate  beds  to  their  present  dip,  and  dislocate  them  along 
the  planes  described.  The  planes  of  the  elevating  forces  were  probably  vertical  planes, 
nearly  in  the  azimuths  of  5°  West  of  North,  and  33°  West  of  North  (both  magnetic  bear- 
ings). I have  reason  to  believe  that  the  conjugate  system  (A,  C)  has  been  principally 
concerned  in  imparting  to  the  mass  of  conglomerate  its  inner  or  latent  structure,  which 
MDCCCLVIII. 
* This  is  a reversed  fault. 
2 z 
