28  CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,  1906,  PART   I. 
the  veins  had  frozen  walls.  Sufficient  ore  had  not  yet  been  taken 
from  the  tunnel  to  make  a  shipment. 
The  two  Cleveland  tunnels  are  also  situated  at  the  mouth  of  Cleve- 
land Gulch.  They  are  short  and  but  a  few  hundred  feel  apart.  The 
rock  in  the  vicinity,  as  well  as  underground,  is  massive  granite. 
Mineralization  is  confined  to  impregnations  of  pyrite  and  veins  of 
quartz,  but  in  places  these  have  suffered  brecciation  and  Assuring 
since  their  formation.  Development  has  not  progressed  sufficiently 
far  to  expose  ore  of  any  account. 
The  Illinois  Boy  is  an  old  prospect  on  the  east  side  of  Cleveland 
Gulch.  It  is  opened  by  a  250-foot  tunnel  in  granite.  Ore  like  that 
of  the  Monticello  is  said  to  have  been  shipped  occasionally,  but  at 
the  time  of  visit  the  mine  was  idle. 
The  Bod  Homme  tunnel  is  situated  southwest  of  Whitecross,  on 
the  south  slope  of  the  valley.  At  present  it  is  closed  under  pending 
litigation.  It  is  said,  however,  to  have  penetrated  nearly  2,000  feet 
of  massive  granite,  which  is  also  the  country  rock  at  the  surface. 
In  this  distance,  as  reported,  it  intercepted  one  of  the  fissures  out- 
cropping on  the  summit  of  the  hill  to  the  south  and  locally  called 
the  Fanny  vein.  Ore  consisting  chiefly  of  chalcopyrite  with  quartz 
is  reported  from  prospects  on  the  vein. 
The  La  Belle  tunnel,  owned  by  the  Columbus  Consolidated  Mining 
and  Tunnel  Company,  is  opposite  Whitecross  post-office,  on  the 
south  slope  of  the  valley.  Development  has  been  carried  on  through 
a  650-foot  tunnel  running  due  south  and  a  L30-foo1  crosscut  to  the 
southeast.  This  tunnel  is  located  in  a  granite  area  and  all  the  work- 
in--  are  in  massive  jointed  granite.  Three  thin  fissures  were  inter- 
cepted, the  first  trending  east  and  west  and  the  others  shifting  to 
the  northeast.  All  are  barren  save  the  last,  which  is  iron  stained, 
hut  no  ore  was  observed.  It  is  said  that  the  management  is  driving 
for  a  Qortheasl  vein  that  outcrops  in  the  first  ravine  to  the  east. 
The  Silver  Star  property  lies  on  the  north  side  of  the  valley  a 
short  distance  northeast  of  Whitecross.  The  workings  are  very  old 
and  at  the  time  of  visit  were  abandoned  and  inaccessible.  Men  who 
have  worked  in  the  tunnel,  however,  agree  that  it  is  about  100  feet 
in  extent  along  a  southwest  vein.  The  rock  at  the  surface  and  also 
underground  belongs  to  the  complex  of  t  nil's  and  Hows  which  fills  the 
valley  to  the  east.  This  mine  is  said  to  have  produced  a  good  grade 
of  copper  ore,  consisting  chiefly  of  gray  copper  with  chalcopyrite. 
Specimens  taken  from  the  dump  confirm  this  report  and  show  in  the 
vein  considerable  tetrahedrite  and  about  equal  amounts  of  chalco- 
pyrite and  pyrite,  with  a  gangue  largely  of  quartz.  The  walls  are 
highly  silicified  fragmental  rocks,  probably  tuffs,  through  which  are 
sprinkled  grains  of  pyrite  and  perhaps  of  tetrahedrite. 
The  Champion  shaft  is  on  the  north  side  of  Lake  Fork,  a  few  hun- 
dred feet  east  of  the  Silver  Star.     The  property  is  now   abandoned 
