296 
CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,  1904.         [bull.  260. 
foot  wall,  sometimes  separated  from  it  by  barren  quartzite,  occur 
numerous  ore  bodies  of  very  irregular  shape  (see  fig.  19).  The 
whole  fissured  zone,  300  feet  in  width,  may  be  regarded  as  a  single 
great  lode,  within  which  the  partly  overlapping  and  partly  connected 
ore  bodies  are  not  uniformly  distributed  in  the  plane  of  the  zone,  but 
are  grouped  into  at  least  four  fairly  distinct  shoots,  three  of  which 
have  a  general  northwesterly  pitch  (in  the  plane  of  the  lode)  of  45°. 
The  fourth,  which  is  the  most  northwestern  of  the  large  pay  shoots,: 
occurs  at  the  junction  of  the  main  foot-wall  fissure,  with  a  zone  of 
fissures  running  off  into  the  hanging  wall  in  a  southwesterly  direction 
and  dipping  southeast.  This  is  the  so-called  Jersey  or  Skookum 
fissure.     Along  this  fissure  zone  for  a  horizontal  distance  of  nearly 
Fig.  19. — Section  through  Bunker  XT  ill  and  Sullivan  lod< 
to  foot-wall  fissure. 
diowinjr  relation  of  ore  bodies 
500  feet,  and  in  the  pitching  trough  formed  by  the  intersection  with 
the  main  foot-wall  fissure,  occurs  some  of  the  richest  ore  in  the 
Wardner  mines.  The  other  pay  shoots  are  also  connected  with  dis-j 
tinct  Assuring  of  the  hanging-wall  quartzite,  but  this  Assuring  is  else- 
where of  a  more  irregular  character  than  in  the  Jersey  fissure  zone. 
The  ore  of  the  Sierra  Nevada  mine  also  occurred  in  a  hanging-wall 
fissure  zone  connecting  with  the  main  foot  wall  of  the  Bunker  Hill 
and  Sullivan  lode. 
Definite  walls  to  the  ore  bodies  of  the  Wardner  mines  occur  only 
where  the  ore  rests  upon  the  gouge  seams  marking  the  main  foot 
wall  or  the  foot  wall  of  the  Jersey  fissure  zone,  or  where  the  ore  has 
