OLD  EED  SANDSTONE  OE  THE  COUNTY  OF  WATEEFOED. 
345 
System  A'. 
This  system  is  very  strongly  marked  at  many  places  to  the  west  of  Red  Head.  It 
contains  75  planes  observed;  of  which 
30  are  vertical. 
19  dip  North  at  71°  average. 
26  dip  South  at  81°  average. 
The  northern  dip  of  these  planes  is  also  less  than  the  southern. 
The  average  bearing  of  this  system  is  33°  48'  North  of  East,  which  coincides  remark- 
ably well  with  the  bearing  of  the  most  important  system  of  faults  in  the  district,  viz. 
A'=  34°  22'  North  of  East. 
System  C. 
This  system  contains  24  observed  planes;  of  which 
15  are  vertical. 
6 dip  East  at  79°  average. 
3 dip  West  at  82°  average. 
The  average  bearing  of  this  system  is  6°  15'  West  of  North. 
System  C'. 
This  system,  west  of  Red  Head,  contains  28  observed  planes ; of  which 
13  are  vertical. 
8 dip  East  at  75°  average. 
7 dip  West  at  76°  average. 
This  system  bears  36°  36'  West  of  North ; and  it  is  to  be  observed  that  the  easterly 
and  westerly  dips  of  C and  C'  West  of  Red  Head  are  more  nearly  equal  than  the 
northerly  and  southerly  dips  of  A and  A',  a fact  which  also  appears  from  the  observa- 
tions East  of  Red  Head. 
Besides  the  planes  already  recorded,  which  belong  to  the  conjugate  systems  A,  C,  and 
A',  C',  there  were  several  others,  which  I have  endeavoiwed  to  tabulate  as  follows : — 
3 A 2 
